U3O8 Corp. Files NI 43-101 Technical Report on the Laguna Salada Project, Argentina

TORONTO, ONTARIO--(Marketwire - May 20, 2011) -U3O8 Corp. (TSX VENTURE:UWE), a Canadian-based company focused on exploration and resource expansion of uranium and associated commodities in South America, reports the filing of the National Instrument 43-101 ("NI 43-101") Technical Report on the Laguna Salada Project in Chubut Province, Argentina, following the company's press release on April 7, 2011 that announced the uranium- vanadium resource estimate on this project as follows:

Uranium:

* Indicated Resource: 6.3 million pounds ("mlbs") U3O8 (47 million tonnes at a grade of 60ppm U3O8);
* Inferred Resource: 3.8mlbs U3O8 (21 million tonnes at a grade of 85ppm U3O8);

Vanadium:

* Indicated Resource: 57mlbs V2O5 (47 million tonnes at a grade of 550ppm V2O5); and
* Inferred Resource: 27mlbs V2O5 (21 million tonnes at a grade of 590ppm V2O5).

Laguna Salada is a low-grade prospect with a number of positive attributes for a potentially low-cost mining project including excellent beneficiation features that can increase the uranium and vanadium grades by four to 12 times through simple and inexpensive screening (see U3O8 Corp's press releases dated April 7, 2011 and March 2, 2011.) For uranium, this would lead to a head grade of approximately 550-580 ppm U3O8 – typical of head grades of similar deposits elsewhere in the world1. The mineralized layer at Laguna Salada lies near the surface of flat-topped mesas and mining could simply lower the profile of the mesas. The uranium-vanadium occurs in soft, unconsolidated gravel that should require no blasting and crushing. Acid leach tests yielded good recoveries of both metals. Metallurgical test work on both acid and alkaline leach is ongoing.

Mineralization remains open in both the Guanaco and Lago Seco areas of Laguna Salada. Further resource growth will be investigated through the exploration of possible extensions to the Laguna Salada Project as well as through exploration of similar targets in Santa Cruz Province in southern Argentina.

A summary of the resource estimates in the Laguna Salada Project is shown below. The recommended cut-off grades for the two mineralized areas, taking into account their distinct beneficiation characteristics, are: 25ppm U3O8 for Guanaco and 100ppm U3O8 for Lago Seco.



The NI 43-101 Technical Report is dated May 20, 2011 and titled "Laguna Salada Project, Chubut Province, Argentina, NI 43-101 Technical Report on Laguna Salada, Initial Resource Estimate". The report can be viewed on SEDAR at www.sedar.com and on the company's web site at www.u3o8corp.com. The report was undertaken by Mr. Neil Inwood, a Member of The Australasian Institute of Mining and Metallurgy, is employed by Coffey Mining Pty Ltd, and visited the Laguna Salada site in May 2010. Mr. Inwood has sufficient experience which is relevant to the style of mineralization and type of deposit under consideration and to the activity which he is undertaking, to qualify as a Competent Person as defined in the 2004 Edition of the "Australasian Code for Reporting of Mineral Resources and Reserves" and as a "qualified person" for purposes of NI 43-101. The disclosure contained in this news release relating to the Mineral Resource set forth above has been prepared under the supervision of, and verified by, Mr. Inwood and is included herein with his consent.

All other scientific and technical information contained in this news release has been prepared under the supervision of, and verified by Dr. Richard Spencer, P. Geo, President & CEO of U3O8 Corp., a "qualified person" within the meaning of NI 43-101.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company, focused on exploration and resource expansion of uranium and associated commodities in South America – a promising new frontier for uranium exploration and development. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region comprising NI 43-101 resources in Guyana and Argentina to significant historic resources in Colombia.
(1) Similar deposits elsewhere in the world such as Langer Heinrich typically have a mill feed grade of 500- 600ppm after beneficiation. These deposits have not been independently verified by U3O8 Corp. and information regarding these deposits is drawn from publicly available information.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the possibility that the open-pit mining ban in Chubut Province may not be lifted or amended on terms that would allow for mining of the Laguna Salada Project, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates and that the resource potential will be achieved on exploration projects, currency fluctuations, dependence upon regulatory approvals, the accuracy on which resource calculations are based, actual mineralization differing from resource estimates, and the uncertainty of obtaining additional financing and exploration risk. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Announces Creation of Rare Earth Subsidiary & Concurrent Financing

TORONTO, ONTARIO--(Marketwire - March 7, 2011) -

NOT FOR DISSEMINATION IN THE UNITED STATES OR THROUGH U.S. NEWSWIRE SERVICES

U3O8 Corp. (TSX VENTURE:UWE), a Canadian-based company focused on exploration and resource expansion of uranium and associated commodities in South America, has announced the transfer of its Jasimampa rare earth property in Santiago del Estero Province, Argentina, into a new rare earth focused subsidiary, South American Rare Earth Corp. (the "Property Spin Out"). The spin-out of this non-core asset allows for a focused strategy to explore and finance early-stage rare earth properties by South American Rare Earth while looking for other rare earth opportunities in South America.

"While exploring for uranium, we found promising rare earth mineralization exposed at surface that extended under shallow soil cover on our Jasimampa property in Argentina," said Dr. Richard Spencer, U3O8 Corp's President and CEO. "Although rare earth elements are not U3O8 Corp's core business, we recognized clear potential in the Jasimampa area, which has mineralization that appears analogous to the Mountain Pass deposit in California – currently being restarted as USA's sole rare earth mine. With the spin out of this asset, U3O8 Corp. retains exposure to a new company focused exclusively on prospective rare earth targets that can progress at their own rate and on their own merit, while we continue to aggressively advance our priority uranium projects with the potential for rapid resource growth in the near-term."

New Rare Earth Subsidiary

Following the completion of the Property Spin Out and Offering, U3O8 Corp. will hold approximately 19.9% of the shares issued in South American Rare Earth as well as a 2% net smelter royalty in return for its interest in the Jasimampa property, which is being transferred to South American Rare Earth. U3O8 Corp. will initially manage the exploration program and corporate development opportunities of South American Rare Earth, and will be reimbursed for funds used to explore the Jasimampa property. This opportunity is initially proposed to be a private company and could transition to a publicly traded vehicle as early as 12 months from inception if exploration results are positive.

Reconnaissance exploration of the Jasimampa property has defined a core zone that has an average grade of approximately 1.1% total rare earth oxides ("TREO"). Mineralization appears to extend beneath shallow soil cover and drilling is required to further evaluate the extent and grade of the mineralized area. Early indications are that the core target area measures approximately 600 metres long by 250 metres wide.

The exploration target is a carbonatite intrusive centre that contains cerium, lanthanum and neodymium-bearing minerals. Approximately 5% of the TREO consist of heavy rare earth elements ("HREO"). The potential of the property will be investigated further through an extensive trenching program. Subject to good assay results, drilling is planned to commence in the latter part of 2011.

Concurrent Financing

In connection with the Property Spin Out, U3O8 Corp. has engaged PowerOne Capital Markets Limited ("PowerOne") to complete a private placement (the "Offering") of up to 20,000,000 units ("Units") of South American Rare Earth at a price of $0.20 per Unit to raise up to $4,000,000. Each Unit will consist of one common share (a "Common Share") and one-half of one Common Share purchase warrant (a "Warrant"). Each full Warrant will be exercisable into one Common Share of South American Rare Earth at a price of $0.30 per share for a period ending on the earlier of (i) 24 months following the public listing of the Common Shares; and (ii) five years following the completion of the Offering.

As consideration for the services of PowerOne, U3O8 Corp. shall pay a cash commission and issue broker warrants ("Broker Warrants") equal to 7.5% of the Units issued in the Offering. Each Broker Warrant will be exercisable into one Unit of South American Rare Earth at a price of $0.20 per Unit for 24 months following the public listing of the Common Shares.

Insiders of U3O8 Corp. will initially be limited to subscribe for no more than 25% of the Units, which is approximately proportional to their direct and indirect holdings in U3O8 Corp. In the event that the Offering is not fully subscribed, U3O8 Corp. insiders will be eligible to subscribe for additional Units. The net proceeds of the Offering will be used to explore the Jasimampa property, to search for and acquire additional properties prospective for rare earth metals and to reimburse the costs of U3O8 Corp. incurred in the acquisition and exploration of the Jasimampa property.

The Property Spin Out and Offering remain subject to the receipt of all applicable regulatory approvals, including the approval of the TSX Venture Exchange.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company focused on exploration of uranium and associated commodities in South America – a promising new frontier for uranium exploration and development. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region comprising NI 43-101 compliant resources in Guyana to significant historic resources in Colombia and near-resource and discovery potential in Argentina. Additional information on U3O8 Corp., each material project and technical reports are available on the company's web site at www.u3o8corp.com and on SEDAR at www.sedar.com.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the impact of general economic conditions, industry conditions, volatility of financial markets and commodity prices, currency fluctuations, dependence upon regulatory approvals, and the uncertainty of obtaining financing and exploration risk. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.


Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact

U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Reports Positive Metallurgical Test Results From the Laguna Salada Project, Argentina

Corroborates Potential for Low-Cost Uranium-Vanadium Project


TORONTO, ONTARIO--(Marketwire - March 2, 2011) - U3O8 Corp. (TSX VENTURE:UWE), a Canadian-based company focused on exploration and resource expansion of uranium and associated commodities in South America, reports positive results from the first metallurgical tests on uranium- and vanadium-bearing gravels from the Laguna Salada Project, Chubut Province, Argentina, which show that:

Uranium and vanadium grades can be increased between 4 and 12 times simply by screening;
Uranium leach recovery from upgraded material was between 74% and 96%; and
Vanadium leach recovery from upgraded material was between 71% and 86%.

"U3O8 Corp's initial metallurgical test results mark an important step towards demonstrating the economic viability of Laguna Salada, adding yet another positive attribute to this potentially low cost project" said Richard Spencer, U3O8 Corp's President and CEO. "Firstly, the mineralized layer at Laguna Salada lies near the surface of flat-topped mesas and mining could simply lower the profile of the mesas. Secondly, the uranium-vanadium occurs in soft, unconsolidated sandy gravel that should be amenable to low-cost mining techniques that require no blasting and crushing. Thirdly, our metallurgical tests show that simple and inexpensive screening results in a concentration of the uranium-vanadium into a small component of the original gravel."

Dr. Spencer continued, "These metallurgical results show good recoveries for both uranium and vanadium using an acid leach. Other similar deposits use an alkaline leach and our tests using this approach are in progress. Further test work will be ongoing in 2011 to optimize the recovery of uranium and vanadium. Coffey Mining, of Australia, is incorporating these preliminary beneficiation and uranium-vanadium extraction results into its calculation of a proposed National Instrument 43-101 ("NI 43-101") resource estimate on Laguna Salada that is due out shortly."

Metallurgical Test Work

The Laguna Salada Project contains slightly different types of gravel that occur in two distinct areas. Both gravels are soft and unconsolidated. A composite sample from each area was excavated with a backhoe and sent, without any processing or crushing, to SGS Lakefield's laboratory in Lakefield, Ontario, for metallurgical testing. The metallurgical tests involved three components as follows:

1. Wet Screening of Mineralized Gravel

The gravel samples from both areas were screened to determine the extent to which the fine powdery uranium-vanadium mineral, carnotite, could be separated from the coarser pebbles and sand grains in the gravel. In each case, the gravel was tumbled and wet screened through successively smaller mesh sizes. Optimal results were achieved by screening the samples through a 0.15 millimetre ("mm") mesh.

Results from the Guanaco area show that the coarse material can be screened from the sample, leaving between 70% and 100% of the fine-grained carnotite concentrated in only 8% of the weight of the original sample. Therefore, the carnotite can be upgraded as much as 12 times by tumbling and wet screening the raw mineralized gravel.

Results from the Lago Seco area show that between 88% and 100% of the carnotite can be concentrated in 23% of the original sample, which corresponds to about a four time increase in grade by screening the raw sample that was excavated from the field.

2. Acid Leach Test

The fine-grained material that contains up to 100% of the uranium and vanadium screened from the original raw sample was then subjected to an acid leach test to determine the extent to which the mineralization can be recovered.

The sample from the Guanaco area showed 74% uranium and 86% vanadium recovery after a leach time of 36 hours with 23.6 kilogram/tonne ("kg/t") sulphuric acid consumption per tonne of the raw mineralized gravel.

The sample from the Lago Seco area showed 96% uranium and 71% vanadium recovery with 49.2 kg/t of acid consumption per tonne of the raw mineralized gravel.

3. Carbonate Leach Test

Carbonate leach testing on the fine-grained samples is underway to determine the extent to which uranium and vanadium can be recovered using alkaline fluids as opposed to acid. Results are due in late March.

Table 1 – Summary of Provisional Metallurgical Tests from the Laguna Salada Project

Table 2 – Summary Trench Results from the Laguna Salada Project

Summary of assay results from the 465 trenches (of the 1,090 trenches excavated) in the Laguna Salada Project that have grade-thickness values greater than 50 ppm-m (parts per million - metre) before screening of the mineralized gravel to increase the uranium and vanadium grades.

The results have been separated into three groups according to the uranium grade-thickness value from each trench. Grade-thickness (the uranium grade in ppm multiplied by the thickness in metres of the uranium-bearing layer in each trench). This table shows the average grade and average thickness of all the trenches within each of the three groups or contour-bounded intervals. The arithmetic average thickness of the uranium-vanadium-bearing layer in the 465 trenches is 0.93 metres at an average sample grade of 155ppm U3O8 and 842ppm V2O5. The average density of the gravel is 1.68 tonnes per cubic metre.

Regulatory Update in Chubut Province

The Laguna Salada Project is located in Chubut Province of Argentina, where an open-pit mining ban is currently in effect. Draft legislation is under review in the Provincial Legislature, which proposes that mining carried out in an environmentally and socially responsible manner be allowed in the central, semi-desert plain of the region. A similar approach that allows mining in the central plain, which is an area of low economic viability, is in effect in the adjacent Santa Cruz Province. Laguna Salada and several other mining projects are situated in this central plain of Chubut Province including CNEA's (Argentinean National Nuclear Authority) Cerro Solo uranium deposit and Pan American Silver's Navidad silver project, both of which are due to be mined by open-pit methods. Both of these projects are moving towards production and indications are that a change in Chubut Province's mining policy may be made in late 2011.

Mr. John Goode, P.Eng., a Qualified Person within the definition of that term in NI 43-101 of the Canadian Securities Administrators, has overseen the metallurgical test work carried out by SGS Lakefield, and verified the technical information relating to the tests from which results are reported in this press release. Dr. Richard Spencer, P. Geo., President & CEO of U3O8 Corp., a Qualified Person within the definition of that term in NI 43-101 of the Canadian Securities Administrators, has supervised the preparation of, and verified the technical information relating to the Laguna Salada Project and the grade-thickness information provided above.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company, focused on exploration and resource expansion of uranium and associated commodities in South America – a promising new frontier for uranium exploration and development. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region comprising NI 43-101 compliant resources in Guyana to significant historic resources in Colombia and near-resource and discovery potential in Argentina.

For further information on U3O8 Corp's Laguna Project, refer to the technical report entitled "The Geology of Uranium Mineralization of the Laguna Salada Project, Chubut Province, and exploration strategies for exploration of early-stage properties in Argentina" prepared by Richard Spencer and Richard Cleath dated March 23, 2010, which is available on the company's web site at www.u3o8corp.com or on SEDAR at www.sedar.com. Potential quantity and grade is conceptual in nature. There has been insufficient exploration to define a mineral resource at the Laguna Salada Project to date, and it is uncertain if further exploration will result in the target being delineated as a mineral resource.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the possibility that the open-pit mining ban in Chubut Province may not be lifted or amended on terms that would allow for mining of the Laguna Salada Project, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates and that the resource potential will be achieved on exploration projects, currency fluctuations, dependence upon regulatory approvals, and the uncertainty of obtaining additional financing and exploration risk. There is no assurance that the Laguna Salada Project will add to U3O8 Corp's resource base in the short-term, or at all. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

To view the photo associated with this press release, please visit the following link: http://media3.marketwire.com/docs/Laguna_Salada.jpg.


Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact

U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Outlines 2011 Exploration Program Aimed at Rapidly Expanding Its NI 43-101 Resource Portfolio in South America

TORONTO, ONTARIO--(Marketwire - Jan. 24, 2011) - U3O8 Corp. (TSX VENTURE:UWE), a Canadian-based company, focused on exploration and resource expansion of uranium and associated commodities in South America, today announced its planned exploration program, which aims to substantially increase its National Instrument 43-101 ("NI 43-101") resource portfolio in Colombia, Guyana and Argentina in 2011.

The primary objectives are:

* Berlin Project, Colombia: to define a potential NI 43-101 resource of an initial 20 to 25 million pounds ("mlb") uranium in part of the area on which a historic resource was estimated1;

* Kurupung Project, Guyana: to expand the current NI 43-101 resource to 20 to 25mlb2 of uranium while continuing to show further size potential of the Kurupung uranium system; and

* Laguna Salada Project, Argentina: to report a NI 43-101 resource estimate on Laguna Salada while exploring the next target with the aim of increasing the overall resource to 20 to 24mlb3 uranium on these two projects in southern Argentina.

Berlin Project1

A 10,000 metre ("m") exploration drilling program is underway in the southern part of the mineralized trend at Berlin – in the area on which a historic resource was estimated. A second drill rig is scheduled to arrive on-site in February. U3O8 Corp's trenching has demonstrated consistent mineralization over 3km along trend and drilling has intersected similar uranium grades to historic data, but over greater widths than those recorded in historic reports. In addition, potential co-products including phosphate, vanadium, yttrium, rhenium, molybdenum and silver have been identified (December 8, 2010 press release).

Preliminary metallurgical test results are expected in Q1 2011. Infill drilling is planned to start in Q2 as the Berlin Project is advanced towards a potential NI 43-101 uranium resource estimate with an initial objective of 20 to 25mlb by year-end. In addition, trenching continues in the northern part of the property to confirm historic records that show that the entire 10.5km mineralized trend is prospective, which could substantially expand the size potential of the project.

Kurupung Project2

An infill drill program of approximately 11,000m is planned to begin in March, on the first of three mineralized areas: the Aricheng West corridor, Aricheng C, and on the Accori North C structure – towards expanding the current NI 43-101 resource on the Kurupung Project (January 20, 2011 press release).

Concurrent with infill drilling, scout drilling will continue with the aim of showing that the Kurupung could be of comparable size to peer deposits that typically contain 60 to 130mlb of uranium4.

Laguna Salada Project3

Initial metallurgical test results and a NI 43-101 resource on Laguna Salada are expected in Q1 2011. U3O8 Corp. has commenced exploration of another surficial uranium target with similar size potential and grade to Laguna Salada. As with Laguna Salada, exploration of the second target is planned through mechanized trenching due to the soft and unconsolidated nature of the uranium-vanadium - bearing gravels. The goal is to have a cumulative resource estimate of 20 to 24mlb completed on the two projects in southern Argentina by the end of 2011.

"U3O8 Corp. has established a clear path to efficiently and rapidly increase its uranium resources through organic growth in the next 12 months," said Dr. Richard Spencer, U3O8 Corp's President and CEO. "In addition, we are finding potentially valuable co-products such as phosphate, vanadium, rhenium and the heavy rare earth, yttrium."

Dr. Richard Spencer (P.Geo.), CEO and President of U3O8 Corp., a Qualified Person within the definition of that term in NI 43-101 of the Canadian Securities Administrators, has overall responsibility for all aspects of the exploration program. Dr. Spencer has supervised the preparation of, and verified, the technical information in this release.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company, focused on exploration and resource expansion of uranium and associated commodities in South America – a promising new frontier for exploration and development in the uranium industry. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region comprising NI 43-101 compliant resources in Guyana to significant historic resources in Colombia and near-resource and discovery potential in Argentina.

1. The Berlin Project has a historic resource of 12.9 million tonnes at an average grade of 0.13% U3O8 (38mlb U3O8) and is reported in Castano, R. (1981), Calcul provisoire des reserves geologiques de Berlin, sur la base des resultants des sondages, unpublished Minatome report, 15p. There has been insufficient exploration to verify the historic estimate and it should not be relied upon as a NI 43-101 compliant resource.

2. Scout drilling to date suggests that the Kurupung may contain a conceptual target of 13-18 million tonnes at a grade of 0.08% to 0.10% U3O8 (estimated 30 to 35mlb U3O8) including the initial NI 43-101 resource. The initial NI 43-101 resource estimate of 5.8mlb Indicated at an average grade of 0.10% (2.0 lbs/st) U3O8 and 1.3mlb Inferred at an average grade of 0.09% (1.9 lbs/st) U3O8 was reported on the Aricheng North and Aricheng South structures. Refer to the technical report dated January 14, 2009 titled "A Technical Review of the Aricheng North and Aricheng South Uranium Deposits in Western Guyana for U3O8 Corp. and Prometheus Resources (Guyana) Inc.", available on U3O8 Corp's web site at www.u3o8corp.com and on SEDAR at www.sedar.com.

3. Based on trench results reported to date on the Laguna Salada Project (press release dated October 27, 2010), two projects of similar size and grade have the potential to contain a cumulative target of 9 to 11 million tonnes at a grade of 100ppm to 150ppm U3O8 (estimated 20 to 24mlb U3O8).

4. Geologically similar albitite-hosted uranium deposits worldwide (e.g. Coles Hill (USA), the Valhalla (Australia) and Michelin (Canada)) typically host resources in the 60 to 130mlb range with typical grades of 0.06% to 0.10% U3O8. These deposits have not been independently verified by U3O8 Corp. and information regarding these deposits is drawn from publicly available information. Comparisons of U3O8 Corp's uranium resource and exploration targets with other uranium deposits are conceptual in nature. There is no certainty that further exploration of U3O8 Corp's resource or targets will result in a similar mineral resource.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates and that the resource potential will be achieved on the Kurupung Project, Berlin Project and Laguna Salada, currency fluctuations, dependence upon regulatory approvals, and the uncertainty of obtaining additional financing and exploration risk. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact
U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491

richard@u3o8corp.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Extends Near-Surface Uranium Mineralization Over a 28km2 Area in the Laguna Salada Project, Argentina

Free-Digging Surficial Uranium in Sandy Gravel Offers Low-Cost Mining Potential

TORONTO, ONTARIO--(Marketwire - Oct. 27, 2010) - U3O8 Corp. (TSX VENTURE:UWE), a Canadian-based company focused on exploration and resource expansion of uranium and associated commodities in South America, reports that successful exploration has increased the size of its uranium-vanadium discovery at Laguna Salada, in Chubut Province, Argentina, to 28 square kilometres ("km2") in extent (Figure 1). A total of 1,090 trenches have been excavated to determine the extent of the mineralized layer which occurs from surface down to a maximum depth of three metres in unconsolidated sandy gravel. The average thickness of the mineralized layer is 0.9 metres at average uranium and vanadium grades of 155 parts per million ("ppm") U3O8 and 842ppm V2O5 respectively at a cut-off grade of 50ppm U3O8 (Table 1).

"Uranium and vanadium at Laguna Salada occur within a low-grade flat mineralized layer located just beneath surface in a soft sandy gravel that should be amenable to simple and low cost mining techniques," said Dr. Richard Spencer, President and CEO of U3O8 Corp. "Laguna Salada is comparable to known surficial uranium deposits in Namibia such as the free-digging Tubas Red Sand at an average grade of 160ppm U3O81. Infill trenching is underway towards our goal of completing a National Instrument 43-101 ("NI 43-101") resource estimate on the project by the end of 2010. Thereafter, our exploration will focus on similar targets in the vicinity of Laguna Salada with the objective of increasing the size of the overall resource in the district."

Table 1 – Summary Trench Results from the Laguna Salada Project

Summary of assay results from the 465 trenches (of the 1,090 trenches excavated) in the Laguna Salada Project that have grade-thickness values greater than 50 (parts per million - metre).

The results have been separated into three groups according to the uranium grade-thickness value from each trench. Grade-thickness (the uranium grade in ppm multiplied by the thickness in metres of the uranium-bearing layer in each trench) provides a way of visualizing the distribution of uranium as shown in Figure 2. This table shows the average grade and average thickness of all the trenches within each of the three groups or contour-bounded intervals (each of which is coloured differently in Figure 2). The arithmetic average thickness of the uranium-vanadium- bearing layer in the 465 trenches is 0.93 metres at an average sample grade of 155ppm U3O8 and 842ppm V2O5. The average density of the gravel is 1.68 tonnes per cubic metre.

Mineralization at Laguna Salada is contained in two flat-topped mesas that are about 10 metres higher than the surrounding plain. Carnotite, the principal uranium-vanadium mineral at Laguna Salada, occurs as a powdery filling between the sand grains in the gravel and also as a partial rim on pebbles. Tests done at the time of sampling suggest that dry sieving through a quarter-inch (nominal six millimetre) mesh may provide a simple and inexpensive means of augmenting the uranium and vanadium grade of the sand.

Exploration at Laguna Salada has been mainly through mechanized trenching since the unconsolidated nature of the gravel renders conventional diamond, aircore or reverse circulation drilling an ineffective means of sampling (Figure 3). The areas that have been trenched at nominal 400 by 400 metre spacing are being in-filled to nominal 200 by 200 metre spacing in preparation for the NI 43-101 resource estimation planned for completion by the end of the year.

Regulatory Update in Chubut Province

The Laguna Salada Project is located in Chubut Province of Argentina, where an open-pit mining ban is currently in effect. Draft legislation is under review in the Provincial Legislature, which proposes that mining carried out in an environmentally and socially responsible manner be allowed in the central, semi- desert plain of the region. A similar approach that allows mining in the central plain, which is an area of low economic viability, has already been adopted in the adjacent Santa Cruz Province. Laguna Salada and several other mining projects are situated in this central plain of Chubut Province including CNEA's (Argentinean National Nuclear Authority) Cerro Solo uranium deposit and Pan American Silver's Navidad silver project, which it plans to mine by open-pit methods. Both of these projects are moving towards production and indications are that a change in Chubut Province's mining policy may be made in 2011.

Quality Assurance & Quality Control

Exploration trenches were excavated at a nominal 400 metre by 400 metre square grid and infilled to a 200 metre by 200 metre grid in the mineralized areas. The mineralized layer, identified with a scintillometer, was marked in the trench wall and its thickness and depth below surface recorded before the sample profile was removed with the bucket of the excavator. Sample material was placed on a tarpaulin where it was homogenized and quartered, one quarter being bagged and weighed before being shipped to the laboratory in Mendoza City in Argentina. Standards, blanks and other control samples constitute approximately 13% of the total number of samples submitted to the laboratory. The samples were dried, jaw crushed to -10 mesh (2.0mm grain size), riffle split and pulverized with a puck and ring to -140 mesh (106 micron grain size). A split of the -140 mesh pulp was analyzed using Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) after four-acid digestion. Samples sent to Alex Stewart Assayers were prepared and analyzed in Mendoza, while those submitted to ALS Chemex were prepared in Mendoza City and the pulps analyzed in its assay laboratory in Lima, Peru.

Dr. Richard Spencer, President & CEO of U3O8 Corp., a Qualified Person within the definition of that term in NI 43-101 of the Canadian Securities Administrators, has supervised the preparation of, and verified the technical information in this release.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company, focused on exploration and resource expansion of uranium and associated commodities in South America – a promising new frontier for exploration and development. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region comprising NI 43-101 compliant resources in Guyana to significant historic resources in Colombia and near-resource and discovery potential in Argentina.

For further information on U3O8 Corp's Laguna Project, refer to the technical report entitled "The Geology of Uranium Mineralization of the Laguna Salada Project, Chubut Province, and exploration strategies for exploration of early- stage properties in Argentina" prepared by Richard Spencer and Richard Cleath dated March 23, 2010, which is available on the company's web site at www.u3o8corp.com or on SEDAR at www.sedar.com. Potential quantity and grade is conceptual in nature. There has been insufficient exploration to define a mineral resource at the Laguna Salada Project to date, and it is uncertain if further exploration will result in the target being delineated as a mineral resource.

(1) The Tubas Red Sand uranium deposit referred to in this press release has not been independently verified by U3O8 Corp. and information regarding this deposit is drawn from publicly available information. There is no certainty that further exploration of U3O8 Corp's Laguna Salada Project or other targets will result in the delineation of a similar mineral resource.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the possibility that the open-pit mining ban in Chubut Province may not be lifted or amended on terms that would allow for mining of the Laguna Salada Project, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates and that the resource potential will be achieved on exploration projects, currency fluctuations, dependence upon regulatory approvals, and the uncertainty of obtaining additional financing and exploration risk. There is no assurance that the Laguna Salada Project will add to U3O8 Corp's resource base in the short-term, or at all. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

To view "Figure 1 – The Laguna Salada Project in Argentina", please visit the following link:

http://media3.marketwire.com/docs/uwe1027fig1.pdf

To view "Figure 2 – Uranium Grade-Thickness Map of the Laguna Salada Project", please visit the following link:

http://media3.marketwire.com/docs/uwe1027fig2.pdf

To view "Figure 3 – Free-Digging Near Surface Mineralization in the Laguna Salada Project", please visit the following link:

http://media3.marketwire.com/docs/uwe1027fig3.pdf

To view the photo associated with this press release, please visit the following link:

http://www.marketwire.com/library/20101026-uwe1027fd_800.jpg

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact
U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Advances Towards NI 43-101 Resource Estimation on the Laguna Salada Project, Argentina

Surficial Uranium in Sandy Gravel Offers Low-Cost Mining Potential

TORONTO, ONTARIO--(Marketwire - June 3, 2010) - U3O8 Corp. (TSX VENTURE:UWE), a Canadian-based company focused on uranium exploration and resource expansion in South America, reports trench results from the Laguna Salada Project in Chubut Province, Argentina. A total of 463 trenches have defined two areas of near surface uranium-vanadium mineralization extending over 16.4 square kilometres (Figure 1). The trenching program continues, aimed at expanding the mineralized area and towards completing a National Instrument 43-101 ("NI 43-101") resource in late 2010. The Laguna Salada Project is a grassroots discovery recently acquired from Mega Uranium Ltd. ("Mega") in which uranium-vanadium mineralization occurs within three metres from surface in unconsolidated gravel in a semi-desert environment.

"The Laguna Salada Project gives our shareholders exposure to a style of uranium deposit that consists of low-grade mineralized layers located very close to surface that can typically be easy and inexpensive to mine and process. Laguna Salada is similar to known surficial uranium deposits found in arid regions in the world including Paladin's Langer Heinrich and Areva's Trekkopje both in Namibia and Mega's Lake Maitland in Australia," said Dr. Richard Spencer, U3O8 Corp's President and CEO. "We are focused on extending the mineralized zones at Laguna Salada through a mechanized trenching program of about 1,000 trenches planned for completion in September. We aim to complete a NI 43-101 resource estimate on the project by the end of 2010 under the guidance of Coffey Mining ("Coffey")."

Table 1 – Summary Trench Results from the Laguna Salada Project

Summary of assay results from the 285 trenches (of the 463 trenches excavated) in the Laguna Salada Project that have grade-thickness values greater than 50 parts per million – metre (ppm-m).


The results have been separated into three groups according to the uranium grade-thickness value from each trench. Grade-thickness (the uranium grade in ppm multiplied by the thickness in metres of the uranium-bearing layer in each trench) provides a way of visualizing the distribution of uranium as shown in Figure 2. This table shows the average grade and average thickness of all the trenches within each of the three groups or contour-bounded intervals (each of which is coloured differently in Figure 2). The arithmetic average thickness of the uranium-vanadium-bearing layer in the 285 trenches is 0.82 metres at an average sample grade of 201ppm U3O8 and 881ppm V2O5. The average density of the gravel is 1.72 tonnes per cubic metre.

Uranium-vanadium mineralization at Laguna Salada occurs from surface to a depth of three metres in unconsolidated sandy gravel. This surficial uranium target is typical of a class of deposits known as caliche-type uranium, which is similar to, but softer than, calcrete-type uranium deposits such as Paladin's Langer Heinrich and Areva's Trekkopje, both in Namibia and Mega's Lake Maitland in Western Australia (Table 2)1. The continuity of mineralization, shallow depths and unconsolidated nature of the gravel that contains the uranium-vanadium at Laguna Salada potentially offers a lower-cost mining opportunity than calcrete-type uranium in which the hardness of the uranium-bearing layer may necessitate blasting.

Table 2 – Resource and Average U3O8 Grade for Surficial Type Uranium Deposits1


Mineralization at Laguna Salada is contained in two flat-topped mesas that are about 10 metres higher than the surrounding plain. Carnotite, the principal uranium-vanadium mineral at Laguna Salada, occurs as a powdery filling between the sand grains in the gravel and also as a partial rim on pebbles. Tests done at the time of sampling suggest that dry sieving through a quarter-inch (nominal six millimetre) mesh may augment the uranium and vanadium grade of the sand by up to 20%.

Extension Program and NI 43-101 Preparation

Exploration at Laguna Salada has been mainly through mechanized trenching since the unconsolidated nature of the gravel renders conventional diamond, aircore or reverse circulation drilling an ineffective means of sampling. An extension program of approximately 1,000 trenches is underway to expand on the potential size of the mineralized zones through follow-up of significant uranium-vanadium grades identified in exploration trenches both to the west and east of the central zones (Figure 2). Trenches will be spaced in a 400 by 400 metre square grid and reduced to 200 by 200 metre spacing in mineralized areas. Extension trenching is expected to be completed by September 2010.

Coffey, an independent consulting company experienced in surficial-type uranium, has been retained to undertake a NI 43-101 resource estimate on the Laguna Salada Project. A consultant from Coffey made a site visit in May 2010. Ongoing exploration data will be submitted to Coffey at regular intervals towards the planned completion of a NI 43-101 resource estimate in late 2010.

Regulatory Update in Chubut Province

The Laguna Salada Project is located in Chubut Province of Argentina, where a ban on open-pit mining is currently in effect. Numerous statements made by the Governor of the Province indicate that this law is under review and the Provincial Government may be moving to support pro-mining legislation. Discussions are underway between government officials and mining industry representatives to lift the provincial ban in certain areas, including the central semi-desert plain, where Laguna Salada is situated. Another positive sign is that Pan American Silver has commenced an aggressive program towards development of its La Navidad silver project. The proposed open pit mine is located in Chubut Province about 300 kilometres northwest of Laguna Salada. Progress to date suggests the policy change could occur as early as 2011.

Quality Assurance & Quality Control

Trenches were excavated at a nominal 400 metre by 400 metre square grid and reduced to a 200 metre by 200 metre grid in the mineralized areas. The mineralized layer, identified with a scintillometer, was marked in the trench wall and its thickness and depth below surface recorded before the sample was removed with the bucket of the excavator. This sample material was placed on a tarpaulin where it was homogenized and quartered, one quarter being bagged and weighed before being shipped to the laboratory in Mendoza city in Argentina. Standards and blank samples were inserted at an average of one per 32 field samples. The samples were analyzed by either Alex Stewart Assayers S.A. or ALS Chemex. The samples were dried, jaw crushed to -10 mesh (2.0mm grain size), riffle split and pulverized with a puck and ring to -140 mesh (106 micron grain size). A split of the -140 mesh pulp was analyzed using Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) after four-acid digestion. Samples sent to Alex Stewart Assayers were prepared and analyzed in Mendoza, while those submitted to ALS Chemex were prepared in Mendoza and the pulps analyzed in its assay laboratory in Lima, Peru.

Density measurements were taken on 268 samples and the average measured was 1.72 tonnes per cubic metre. The sandy gravel contains, on average, 37% sand.

Mr. Richard Cleath (M.Sc.), Vice President of U3O8 Corp., a Qualified Person within the definition of that term in NI 43-101 of the Canadian Securities Administrators, has supervised the preparation of, and verified the technical information in this release.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company, focused on uranium exploration and resource expansion in South America – a promising new frontier for uranium exploration and development. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region comprising NI 43-101 compliant resources in Guyana to significant historic resources in Colombia and near-resource and discovery potential in Argentina.

For further information on U3O8 Corp's Laguna Project, refer to the technical report entitled "The Geology of Uranium Mineralization of the Laguna Salada Project, Chubut Province, and exploration strategies for exploration of early-stage properties in Argentina" prepared by Richard Spencer and Richard Cleath dated March 23, 2010, which is available on the company's web site at www.u3o8corp.com or on SEDAR at www.sedar.com.

(1) The uranium deposits (Lake Maitland, Langer Heinrich and Trekkopje) referred to in this press release have not been independently verified by U3O8 Corp. and information regarding these deposits are drawn from publicly available information. There is no certainty that further exploration of U3O8 Corp's uranium resource or other targets will result in the delineation of a similar mineral resource.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the possibility that the open-pit mining ban in Chubut Province may not be lifted or amended on terms that would allow for mining of the Laguna Salada Project, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates and that the resource potential will be achieved on exploration projects, currency fluctuations, dependence upon regulatory approvals, and the uncertainty of obtaining additional financing and exploration risk. There is no assurance that the Laguna Salada Project will add to U3O8 Corp's resource base in the short-term, or at all. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

To view Figure 1 – The Laguna Salada Project in Argentina, please visit the following link: http://media3.marketwire.com/docs/UWE63fig1i.pdf.

To view Figure 2 – Uranium Grade-Thickness Map of the Laguna Salada Project, please visit the following link: http://media3.marketwire.com/docs/UWE63fig2i.pdf.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact
U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

Proximity to Argentina’s largest known uranium deposits

U3O8 Corp. has an extensive land position adjacent to Argentina’s largest known uranium deposits (the Cerro Solo deposit in Chubut province with a historic resource of 10 million pounds at 0.15% U3O8 and the Sierra Pintada deposit in Mendoza Province with a historic resource of 30 million pounds at 0.12% U3O8)1 presently owned and under development by the National Atomic Energy Commission of Argentina (CNEA). The CNEA has identified these two areas – the Cretaceous San Jorge Basin of Chubut Province and the Sierra Pintada Uranium District in Mendoza Province – as having the country’s best uranium discovery potential.

U3O8 Corp’s most advanced properties in Argentina are in Chubut Province, and contain both surficial uranium and sandstone-hosted uranium targets.

Surficial uranium – Laguna Salada is the first project in Argentina that is being readied to add to our resource inventory, and we aim to complete a NI 43-101 resource estimate by the end of 2010. The Laguna Salada Project hosts surficial uranium that occurs over an extensive 30 square kilometre area and lies within three metres from surface. The contained uranium appears to be leachable from the soft gravel.

Sandstone-hosted uranium – The Cerro Solo Area target lies adjacent to the State-owned Cerro Solo uranium deposit. Scout drilling has intersected significant sandstone-hosted uranium of 1-2 metres at 0.1-0.2% U3O8 in two bore holes. Target areas will be refined through IP geophysical surveys and further drilling.

Other properties in Chubut, Mendoza, Salta, Catamarca, San Luis and Santa Cruz provinces constitute grassroots prospects, which are being evaluated and prioritized for further exploration.

Quick Facts:

* Large land holdings near Argentina’s largest known uranium deposits
* Surficial uranium target appears amenable to low-cost mining
* Aim to complete NI 43-101 uranium resource estimate on the Laguna Salada Project in 2010

Property Interests in Argentina




Exploration Properties in Chubut Province

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Completes Acquisition of Mega Uranium's South American Assets

To create a dominant South American-focused uranium exploration company

TORONTO, ONTARIO--(Marketwire - April 8, 2010) - U3O8 Corp. (TSX VENTURE:UWE) and Mega Uranium Ltd. (TSX:MGA) ("Mega") are pleased to announce the closing of U3O8 Corp's acquisition of Mega's South American uranium properties as previously detailed in the press release dated February 17, 2010. The acquisition creates a well funded, premier South American-focused exploration company with one of the most advanced uranium portfolios on that continent, comprising National Instrument 43-101 ("NI 43-101") compliant resources, historic resources and near-resource potential in an environment of accelerating demand for uranium.

Under the terms of the acquisition, U3O8 Corp. has issued 30,564,858 common shares of U3O8 Corp. (the "U3O8 Shares") in exchange for Mega's South American properties and $4 million in cash. Mega will distribute the U3O8 Shares to its Canadian shareholders, on a pro-rata basis, as a dividend-in-kind paid on Mega's common shares (the "Dividend"), providing Mega shareholders with direct ownership in U3O8 Corp. Non-resident shareholders will receive cash proceeds in lieu of U3O8 Shares. Mega will advise its shareholders of the record date and payment date of the Dividend. As a result of the acquisition, U3O8 Corp. presently has 53,622,558 common shares outstanding and a strengthened balance sheet with a total of more than $7 million in cash.

With the acquisition complete, U3O8 Corp. will focus primarily on the three most advanced projects with the potential to add NI 43-101 resources in the short-term, which are:

* Kurupung Project, Guyana: Ongoing scout drilling aims to identify additional mineralized areas to demonstrate the size potential of the Kurupung Project. Resource drilling on new mineralized areas will then be undertaken to potentially add to the existing NI 43-101 resource. Geologically similar albitite-hosted deposits elsewhere in the world typically contain resources in the 50 to 130 million pound U3O8 range;

* Berlin Project, Colombia: Trenching and drilling will aim to verify the grade and width of mineralization reported in the historical uranium resource(1) of 12.9 million tonnes at a grade of 0.13% U3O8 (38 million pounds U3O8), which also indicated significant grades of vanadium, molybdenum and phosphate; and

* Laguna Salada Project, Argentina: The aim is to complete a NI 43-101 resource estimate by the end of 2010 on this project, which hosts uranium mineralization that lies within three metres from surface in unconsolidated sandy gravel.

It is uncertain if further exploration will define a mineral resource of significant size in the Kurupung Project. Potential quantity and grade is conceptual in nature. To date, there has been insufficient exploration to define a mineral resource in either the Berlin Project or the Laguna Salada Project, and it is uncertain if further exploration will result in a mineral resource being defined in either of these projects.

In connection with the acquisition, the size of U3O8 Corp's board of directors was increased by one to six directors. Patrick Anderson and Richard Spencer resigned as directors of U3O8 Corp. The company expresses sincere thanks to Mr. Anderson for the valued contribution he has made as a co-founder and director of U3O8 Corp., and to Dr. Spencer for his service as a director, who continues to lead U3O8 Corp. as its President and CEO. U3O8 Corp's board of directors now comprises Sheldon Inwentash, Stewart Taylor and Richard Patricio (each nominees of Mega) and Keith Barron, Bryan Coates and David Constable (the remaining existing directors of U3O8 Corp.). U3O8 Corp's current management team will be joined by Phillip Williams (Vice President, Business Development) and Dr. Hugo Bastias (Vice President, Exploration in Argentina/Colombia).

(1) The Berlin resource estimate is historical and is reported in Castano, R. (1981), Calcul provisoire des reserves geologiques de Berlin, sur la base des resultants des sondages, unpublished Minatome report, 15p. Recent independent verification of the historical data has not been performed and sufficient exploration work has not been completed to verify the historic estimate. Neither Mega nor U3O8 Corp. is treating the historical estimate as current mineral resources and it should not be relied upon. As the 38 million pound U3O8 estimated is based only on 11 widely-spaced drill holes, it is regarded by Mega and U3O8 Corp. as merely an indication of the magnitude of the uranium resource potential of the southernmost five kilometre long portion of the syncline containing the Berlin uranium mineralization.

About U3O8 Corp.

With the acquisition complete, U3O8 Corp. is a Toronto-based exploration company, focused on uranium exploration in South America – a promising new frontier for uranium exploration and development. U3O8 Corp. has one of the most advanced portfolios of uranium projects in the region, from NI 43-101 compliant resources in Guyana, to significant historic resources in Colombia and near-resource and discovery potential in Argentina.

Further information on U3O8 Corp. is available on the company's web site at www.u3o8corp.com.

Forward-Looking Statements

Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates and that the resource potential will be achieved on exploration projects, currency fluctuations, dependence upon regulatory approvals, and the uncertainty of obtaining additional financing and exploration risk. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements. All scientific and technical information contained in this press release has been prepared under the supervision of Richard Spencer, President and CEO of U3O8 Corp., pertaining to U3O8 Corp's mineral properties, and Stewart Taylor, President of Mega, pertaining to Mega's mineral properties. Richard Spencer and Stewart Taylor are qualified persons within the meaning of NI 43-101.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact
U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com
www.u3o8corp.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

Mega Uranium Acquires Securities of U3O8 Corp.

TORONTO, ONTARIO--(Marketwire - April 7, 2010) -

NOT FOR DISSEMINATION IN THE UNITED STATES OR FOR DISTRIBUTION TO U.S. NEWSWIRE SERVICES

Mega Uranium Ltd. (TSX:MGA) ("Mega") announces that it acquired ownership today of 30,564,858 common shares of U3O8 Corp. (the U3O8 Shares"), representing approximately 57% of all of the common shares of U3O8 Corp. outstanding as at today. Mega does not own or control any common shares of U3O8 Corp., other than the U3O8 Shares.

Mega acquired the U3O8 Shares as consideration for the sale of its South American assets to U3O8 Corp. pursuant to the terms of an agreement that Mega entered into with the company (details of which were provided in a press release issued by Mega earlier today).

The U3O8 Shares were acquired for the purposes of distributing them to Mega shareholders by way of a pro rata dividend-in-kind on Mega's common shares, which was declared by Mega's board of directors today. Mega has no current intention of acquiring additional common shares of U3O8 Corp. and will dispose of the U3O8 Shares by way of the dividend on April 26, 2010, or otherwise in the market, to the extent that it holds any remaining U3O8 Shares following payment of the dividend (due to rounding for fractional interests).

The securities described in this press release have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws and may not be offered or sold within the United States unless registered under the U.S. Securities Act and applicable state securities laws or an exemption from such registration is available. This press release is for information purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any jurisdiction in which such offer, solicitation or sale would be unlawful.

ABOUT MEGA URANIUM

Mega Uranium Ltd. is a Toronto-based mineral resources company with a focus on uranium properties in Australia, Argentina, Cameroon, Canada and Colombia. Further information on Mega can be found on the company's website at www.megauranium.com. Mega Uranium's Ben Lomond and Maureen properties in Queensland, Australia, are subject to a State policy which presently prohibits the mining of uranium.

For more information, please contact
Investor Relations
Mega Uranium Ltd.
Richard Patricio, Executive VP, Corporate Affairs
(416) 643-7630
info@megauranium.com
www.megauranium.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/

U3O8 Corp. Shares Resume Trading

TORONTO, ONTARIO--(Marketwire - March 2, 2010) - U3O8 Corp. (TSX VENTURE:UWE) announces that in connection with its previously announced acquisition of Mega Uranium Ltd.'s South American properties (see press release dated February 17, 2010), U3O8 Corp's common shares will resume trading at the opening of the market today on the TSX Venture Exchange ("the TSX-V").

U3O8 Corp's proposed acquisition will result in a well funded, premier South American-focused uranium company that brings together a strong portfolio of projects at various stages, from National Instrument 43-101 ("NI 43-101") compliant resources to historic resources and near-resource potential, and merges proven technical and executive teams. This transaction will create a strong foundation for a dominant explorer and future developer in an environment of accelerating demand for uranium.

The three most advanced projects with the potential to add NI 43-101 resources in the short-term are:

* Kurupung Project, Guyana: Ongoing scout drilling aims to identify additional mineralized areas to demonstrate the size potential of the Kurupung. Resource drilling on new mineralized areas will then be undertaken to potentially add to the existing NI 43-101 resource. Geologically similar albitite-hosted deposits elsewhere in the world typically contain resources in the 50 to 130 million pound;

* Berlin Project, Colombia: Drilling will aim to verify the grade and width of mineralization reported in the historical uranium resource1 of 12.9 million tonnes at a grade of 0.13% U3O8 (38 million pounds U3O8), which also indicated significant grades of vanadium, molybdenum and phosphate; and

* Laguna Salada Project, Argentina: Aim to complete a NI 43-101 resource estimate by the end of 2010 on this project, which hosts uranium mineralization that lies within three metres from surface in soft gravel.

It is uncertain if further exploration will define a mineral resource of significant size in the Kurupung or result in a mineral resource being defined in either the Berlin or Laguna Salada projects.

The proposed acquisition remains subject to the satisfaction of various conditions including final TSX-V approval.

(1) The Berlin resource estimate is historical and is reported in Castano, R. (1981), Calcul provisoire des reserves geologiques de Berlin, sur la base des resultants des sondages, unpublished Minatome report, 15p. Recent independent verification of the historical data has not been performed and sufficient exploration work has not been completed to verify the historic estimate. Mega is not treating the historical estimate as current mineral resources and it should not be relied upon. As the 38 million pound U3O8 estimated is based only on 11 widely-spaced drill holes, it is regarded by Mega as merely an indication of the magnitude of the uranium resource potential of the southernmost five kilometre long portion of the syncline containing the Berlin uranium mineralization.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based uranium exploration company in Canada. Currently focused on uranium exploration in the Roraima Basin in Guyana, South America, U3O8 Corp. has exclusive uranium exploration rights covering about one million hectares that straddles the edge of the Roraima Basin in Guyana. The company is advancing a two-pronged exploration strategy that focuses on: (1) exploration for multiple uranium-bearing structures within structural systems in the basement adjacent to the Roraima Basin with the concept that the individual breccia zones could potentially aggregate to a significant total resource; and (2) exploration for unconformity-related uranium deposits near the base of the Roraima Basin, which are similar to those of the prolific Athabasca Basin in Saskatchewan.

Further information on U3O8 Corp's properties are available in the technical report prepared for the company by Dahrouge Geological Consulting Ltd. and dated September 15, 2006 as amended and restated December 12, 2006; and on U3O8 Corp's NI 43-101 resource as detailed in the NI 43-101 report titled "A Technical Review of the Aricheng North and Aricheng South Uranium Deposits in Western Guyana for U3O8 Corp. and Prometheus Resources (Guyana) Inc." by Watts, Griffis and McOuat dated January 14, 2009.

Forward-Looking Statements
Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of U3O8 Corp., including, but not limited to, the impact of general economic conditions, industry conditions, volatility of commodity prices, risks associated with the uncertainty of exploration results and estimates, currency fluctuations, the uncertainty of obtaining additional financing and exploration risk, and dependence upon regulatory approvals including no guarantee that the TSX-V will approve the transaction nor approve the transaction as currently proposed nor that the resource potential will be achieved on exploration projects from the proposed transaction. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact
U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com

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U3O8 Corp. to Acquire Mega Uranium’s South American Assets to Create a Dominant South American-Focused Uranium Exploration Company

TORONTO, ONTARIO--(Marketwire - Feb. 17, 2010) -U3O8 Corp. (TSX VENTURE:UWE) and Mega Uranium Ltd. (TSX:MGA) ("Mega") are pleased to announce that they have entered into a definitive agreement under which U3O8 Corp. will acquire all of Mega's South American uranium properties and $4 million in cash in exchange for 30,564,858 common shares of U3O8 Corp. (the "U3O8 Shares"). The acquisition will provide U3O8 Corp. with an expanded portfolio of projects at various stages, from National Instrument 43-101 ("NI 43-101") compliant resources in Guyana, to significant historical resources in Colombia and near-resource and discovery potential in Argentina. U3O8 Corp. will emerge as a well funded dominant explorer with a strong platform for growth in South America – one of the world's promising new frontiers for uranium exploration and development.

Following completion of the sale, Mega has agreed to take steps necessary to distribute the U3O8 Shares directly to its Canadian shareholders, on a pro-rata basis, by way of a dividend-in-kind paid on Mega's common shares, providing Mega's shareholders with direct ownership in U3O8 Corp. Non-resident shareholders will receive cash proceeds in lieu of U3O8 Shares, as further described below.

Strategic Benefits

U3O8 Corp. and Mega believe this transaction will result in significant strategic benefits and enhance shareholder value for both companies by creating a South American-focused uranium discovery and development company that will have:

* Strengthened balance sheet – $8 million in cash to advance resource expansion and drive exploration;

* NI 43-101 resource – U3O8 Corp's initial Indicated Resource of 5.8 million pounds U3O8 (2.7 million tonnes at a grade of 0.10% U3O8) and Inferred Resource of 1.3 million pounds U3O8 (0.65 million tonnes at a grade of 0.09% U3O8) in the Kurupung Batholith in Guyana. Uranium in the Kurupung is geologically similar to albitite-hosted uranium deposits worldwide that typically contain resources in the 50 to 130 million pound range, although there is no guarantee that the Kurupung will host a resource of similar size;

* Significant historic resource – Mega's Berlin Project in Colombia with historical uranium resource1 potential of 12.9 million tonnes at a grade of 0.13% U3O8 (38 million pounds U3O8) as well as potential for vanadium, molybdenum and phosphate by-products;

* Near-resource potential – Ongoing exploration drilling in the Kurupung project continues to define new mineralized areas that are expected to lead to potentially strong resource growth in the short-term. Mega's Laguna Salada project in Chubut Province, Argentina, is poised to advance to resource estimation in 2010;

* Principal exploration opportunities – Drilling on Mega's mineral concessions near the Cerro Solo uranium deposit in Argentina has intersected significant sandstone-hosted uranium mineralization. U3O8 Corp's exploration in the Roraima Basin in Guyana is identifying key features typically associated with unconformity-related uranium in Canada's Athabasca Basin, which is host to approximately one third of the world's uranium resources. U3O8 Corp. expects to commence drilling of its unconformity-related targets in the Roraima Basin in 2010;

* Strong land positions in favourable South American jurisdictions – broader geographic presence in highly prospective regions in Colombia, Guyana and Argentina. Mega has an extensive land position near Argentina's two largest known uranium deposits (10 million pound Cerro Solo and 30 million pound Sierra Pintada deposits) presently owned and under development by Comision Nacional de Energia Atomica (CNEA), the Argentinean national nuclear authority;

* Strong management and board – proven technical and executive teams with a track record of discoveries and experience in South America, uranium exploration, resource development, and financial markets; and

* Broader investor reach – expanded and diverse shareholder base for enhanced market exposure and liquidity.

"This acquisition enhances U3O8 Corp's position as a premier South American uranium exploration company by significantly adding to our resource pipeline and expanding our geographic presence in highly prospective regions. Together, we are establishing a larger platform and a strengthened balance sheet from which to advance a strong uranium portfolio to create value for our shareholders and stakeholders," said Dr. Richard Spencer, U3O8 Corp's President and CEO.

"This transaction represents the first step for us in unlocking shareholder value attributable to our exploration properties, but not fully recognized, as Mega has become more identified as a near-production company due to the progress of our Lake Maitland project," said Sheldon Inwentash, Mega Uranium's Chairman and CEO. "Shareholders of U3O8 Corp. and Mega (through their equity participation in U3O8 Corp.) can benefit directly from the formation of a unique South American-focused uranium company that brings together a suite of advanced projects, strategic land holdings and highly experienced exploration and executive teams aimed at creating a dominant explorer in an environment of accelerating demand for uranium."

Management and Directors

Upon completion of the transaction, management of U3O8 Corp. will consist of Richard Spencer (President and Chief Executive Officer), Carmelo Marrelli (Chief Financial Officer), Richard Cleath and Dr. Hugo Bastias (Vice Presidents responsible for exploration and resource development), Philip Williams (Vice President, Business Development) and Nancy Chan-Palmateer (Vice President, Investor Relations). In addition, two of the existing five directors of U3O8 Corp. will resign, the size of the board of directors of U3O8 Corp. will be increased by one, and three nominees of Mega will be appointed. Accordingly, the U3O8 Corp. board of directors post-closing will be comprised of Sheldon Inwentash, Stewart Taylor, Richard Patricio (as nominees of Mega), and Keith Barron, Bryan Coates, David Constable (the remaining existing directors of U3O8 Corp.). The six directors of U3O8 Corp. post-closing will then agree upon a seventh candidate to be nominated for election at the next shareholders meeting of U3O8 Corp.

Transaction Details

As currently proposed, U3O8 Corp. will issue the U3O8 Shares to Mega, in exchange for all of the outstanding shares of a wholly-owned subsidiary of Mega, which will indirectly hold Mega's South American properties and $4 million in cash. Following completion of the sale, it is expected that Mega will distribute the U3O8 Shares to its shareholders as a dividend-in-kind paid on its common shares (the "Dividend").

No U3O8 Shares will be delivered to Mega shareholders who are, or are deemed to be, non-residents of Canada. Instead, these shares will be aggregated and sold in the open market, in an orderly fashion, on behalf of the non-resident shareholders who will receive a pro-rata share of the cash proceeds from the sale, net of applicable withholding taxes and brokerage fees.

If the transaction is completed as contemplated, Mega will advise shareholders of the record date and payment date of the Dividend.

Prior to the transaction, there are 23,057,700 issued and outstanding common shares of U3O8 Corp. After the completion of the transaction, there will be 53,622,558 common shares outstanding of U3O8 Corp. (approximately 57% of which will be held by Mega shareholders without consideration of U3O8 Shares to be sold on behalf of non-residents and treatment of fractional shares).

The acquisition is subject to the satisfaction of various conditions, including the approval by the Toronto Stock Exchange, TSX Venture Exchange and, in order to effect the Dividend, the approval by Mega's shareholders of a reduction in the stated capital of Mega's common shares at its Annual and Special Meeting to be held on March 19, 2010 (the "Meeting"). Subject to the satisfaction of all conditions, the transaction is expected to close on or about March 31, 2010.

U3O8 Corp's financial advisor is Cormark Securities Inc.

Stewart Taylor, President of Mega and a qualified person for the purposes of NI 43-101, has reviewed the technical information contained in this news release pertaining to Mega's mineral properties.

Richard Spencer, President and CEO of U3O8 Corp., a qualified person for the purposes of NI 43-101, has reviewed the technical information contained in this news release pertaining to U3O8 Corp's mineral properties.

The securities described in this press release have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws and may not be offered or sold within the United States unless registered under the U.S. Securities Act and applicable state securities laws or an exemption from such registration is available. This press release is for information purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any jurisdiction in which such offer, solicitation or sale would be unlawful.
(1) The Berlin resource estimate is historical and is reported in Castano, R. (1981), Calcul provisoire des reserves geologiques de Berlin, sur la base des resultants des sondages, unpublished Minatome report, 15p. Recent independent verification of the historical data has not been performed and sufficient exploration work has not been completed to verify the historic estimate. Mega is not treating the historical estimate as current mineral resources and it should not be relied upon. As the 38 million pound U3O8 estimated is based only on 11 widely-spaced drill holes, it is regarded by Mega as merely an indication of the magnitude of the uranium resource potential of the southernmost five kilometre long portion of the syncline containing the Berlin uranium mineralization.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based uranium exploration company in Canada. Currently focused on uranium exploration in the Roraima Basin in Guyana, South America, U3O8 Corp. has exclusive uranium exploration rights covering about one million hectares that straddles the edge of the Roraima Basin in Guyana. The company is advancing a two-pronged exploration strategy that focuses on: (1) exploration for multiple uranium-bearing structures within structural systems in the basement adjacent to the Roraima Basin with the concept that the individual breccia zones could potentially aggregate to a significant total resource; and (2) exploration for unconformity-related uranium deposits near the base of the Roraima Basin, which are similar to those of the prolific Athabasca Basin in Saskatchewan.

Further information on U3O8 Corp's properties are available in the technical report prepared for the company by Dahrouge Geological Consulting Ltd. and dated September 15, 2006 as amended and restated December 12, 2006; and on U3O8 Corp's NI 43-101 resource as detailed in the NI 43-101 report titled "A Technical Review of the Aricheng North and Aricheng South Uranium Deposits in Western Guyana for U3O8 Corp. and Prometheus Resources (Guyana) Inc." by Watts, Griffis and McOuat dated January 14, 2009.

About Mega Uranium Ltd.

Mega is a Toronto-based mineral resources company with a focus on uranium properties in Australia, Canada, Argentina, Colombia and Cameroon. Mega is currently advancing its Lake Maitland uranium project in Western Australia to production. Mega's Ben Lomond and Maureen uranium resources are subject to a Queensland State Government policy that presently prohibits the mining of uranium.

Forward-Looking Information

Certain information in this news release constitutes forward-looking information, which is information regarding possible events, conditions or results of operations that is based upon assumptions about future economic conditions and courses of action. All information other than matters of historical fact may be forward-looking information. In some cases, forward-looking information can be identified by the use of words such as "seek", "expect", "anticipate", "budget", "plan", "estimate", "continue", "forecast", "intend", "believe", "predict", "potential", "target", "may", "could", "would", "might", "will" and similar words or phrases (including negative variations) suggesting future outcomes or statements regarding an outlook. Forward-looking information in this press release includes, but is not limited to, statements about our expectations regarding Mega's and U3O8 Corp's future business and operations, including the resource potential of its properties, and our expectations regarding the strategic benefits and enhanced shareholder value that will result from the proposed transaction.

By its nature, forward-looking information involves known and unknown risks, uncertainties and other factors which may cause actual results, performance or achievements to differ materially from those expressed or implied by such forward-looking information. Some of the risks and other factors that could cause actual results to differ materially from those expressed in the forward-looking information contained in this release include, but are not limited to: the possibility that the necessary shareholder and regulatory approvals will not be obtained in a timely manner or at all, and that other conditions to completion of the acquisition will not be satisfied; risks related to the inherent uncertainty of mineral exploration and development activities generally, including political and regulatory risks; various factors beyond our control which influence the market prices of our shares. Although we have attempted to identify important factors that could cause actual results or events to differ materially from those described in the forward-looking information, readers are cautioned that this list is not exhaustive and there may be other factors that we have not identified. Readers are cautioned not to place undue reliance on forward-looking information contained in this release. Forward-looking information is based upon our beliefs, estimates and opinions as at the date of this release, which we believe are reasonable, but no assurance can be given that these will prove to be correct. Furthermore, we undertake no obligation to update or revise forward-looking information if these beliefs, estimates and opinions or other circumstances should change, except as otherwise required by applicable law.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For more information, please contact
U3O8 Corp.
Nancy Chan-Palmateer
VP, Investor Relations
(416) 868-1491
nancy@u3o8corp.com
or
U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com
www.u3o8corp.com
or
Mega Uranium Ltd.
Richard Patricio
Executive VP, Corporate Affairs
(416) 643-7630
info@megauranium.com
www.megauranium.com

For more information on Mining in Argentina, active companies, projects and operating mines, statistics and much more, please visit our website: http://www.argentinamining.com/