Argentex Mining Corporation: Ivonne Vein Returns 3.30 Meters of 4.69 g/t Gold at Pinguino, Including 1.80 Meters of 8.30 g/t Gold

VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 08/23/11 -- Argentex Mining Corporation (TSX VENTURE: ATX)(OTCBB: AGXMF) ('Argentex' or the 'Company') is pleased to release additional drill results from its recently completed 2011 exploration program at the Pinguino project, located in the Santa Cruz province of Argentina. The program consisted of 19,704 meters of drilling in 206 holes. To date, the Company has received results for 8,924 meters of drilling from 100 of the 206 holes, with approximately 51% of holes remaining to be processed in the lab.

Results below are from the most recent 5 holes from the Ivonne Norte vein and 1 hole from Ivonne Sur vein (a map of drill hole collars is available on the Company's web site at www.argentexmining.com):

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                   From        To   Interval     Gold   Silver   (ii)Silver
Drill Hole           (m)       (m)     (m)(i)    (g/t)    (g/t)     Eq (g/t)
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IVONNE NORTE
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PR45-11           20.00     45.00      25.00     0.46      8.6         28.1
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     including    20.00     22.00       2.00     3.48     31.4        181.0
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P390-11          109.40    112.70       3.30     4.69     80.5        282.2
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     including   110.90    112.70       1.80     8.30    115.4        472.1
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P394-11          119.90    124.90       5.00     2.27    116.0        213.8
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     including   120.65    122.25       1.60     6.31    311.0        582.3
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P395-11          124.60    127.00       2.40     1.45     20.5         82.9
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P396-11          231.20    247.35      16.15     1.04     18.6         63.4
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     including   242.65    246.35       3.70     3.04     60.5        191.2
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IVONNE SUR
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P373-11          126.70    135.30       8.60     0.07     20.9         24.0
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           and   172.30    180.55       8.25     0.31     46.1         59.5
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(i)  True widths are estimated to be 85-90% of the stated interval.
(ii) Silver Eq is Silver Equivalent of gold and silver and based upon a
     price ratio of 43:1 gold to silver.
'P'  represents core holes.
'PR' represents RC holes.

'Assay results from the drilling of the Ivonne vein continue to report multi-gram gold values. Ivonne Norte, which is a segment of the 2,300 meter Ivonne vein system, has returned encouraging silver and gold grades in the near-surface oxidized zones as well as at depths of approximately 200 meters below surface within the unoxidized primary mineralization,' commented Ken Hicks, President of Argentex. 'The exploration focus of the 2011 program was the discovery of new precious metal occurrences within the Pinguino vein system and we are pleased with the success reported to date.'

About Pinguino

Argentex's 10,000-hectare Pinguino property is located in Argentina's Patagonia region, within the Deseado Massif of Santa Cruz province. The Deseado Massif is an active region of mining with four precious metal mines currently in production, and includes multiple active advanced and early stage exploration projects.

Pinguino is easily accessible, situated approximately 400 meters above sea level in low-relief topography. An existing system of all-weather roads provides year-round access to the property. Argentex believes that recent high-grade precious metal discoveries within newly tested structures of the district scale vein system at Pinguino show potential for the development of a significant silver-gold resource.

Quality Assurance

Samples selected for analysis are sent to Acme Analytical Laboratories' sample preparation lab in Mendoza, Argentina. From there, sample pulps are sent to Santiago, Chile for fire assay gold analysis and to Vancouver, Canada for Group 1DX multi-element MS-ICP analysis. Samples with over-limit zinc, lead, silver and/or copper are reanalyzed using an ore-grade high detection limit 7AR analysis, also conducted in Vancouver. Acme Analytical Laboratories is an accredited ISO 9000:2001 full-service commercial laboratory with its head office located in Vancouver. Referee analyses will be carried out by Alex Stewart (assayers) Argentina S.A. in Mendoza, Argentina. Argentex, Acme and Alex Stewart all maintain comprehensive and independent Quality Control/Quality Assurance programs.

Exploration on the Pinguino property is being conducted under the supervision of Mr. Kenneth Hicks, P.Geo., Argentex's President and a 'Qualified Person' (QP) as defined by Canada's National Instrument 43-101.

About Argentex:

Argentex Mining Corporation is an exploration company focused on the discovery of silver, gold and polymetallic deposits on its advanced exploration project portfolio in the Patagonia region of southern Argentina. In total, Argentex owns 100% of the mineral rights to more than 35 properties located within approximately 307,981 acres (124,636 hectares) of highly prospective land located in the Santa Cruz and Rio Negro provinces.

Shares of Argentex common stock trade under the symbol ATX on the TSX Venture Exchange and under the symbol AGXMF on the OTCBB.

On behalf of Argentex Mining Corporation:

Ken E. Hicks, President

Statements in this news release that are not historical facts are forward-looking statements that are subject to risks and uncertainties. Words such as 'expects', 'intends', 'plans', 'may', 'could', 'should', 'anticipates', 'likely', 'believes' and words of similar import also identify forward-looking statements. Forward-looking statements in this news release include statements about the Company's belief that recent high-grade precious metal discoveries within newly tested structures of the district scale vein system at Pinguino show potential for the development of a significant silver-gold resource. Actual results may differ materially from those currently anticipated due to a number of factors beyond the Company's control. These risks and uncertainties include, among other things, competition for qualified personnel and risks that are inherent in Argentex's operations including the risks that the Company may not find any minerals in commercially feasible quantity or raise enough money to fund its exploration plans. These and other risks are described in the Company's Annual Report on Form 10-K and other public disclosure documents filed on the EDGAR website maintained by the Securities and Exchange Commission and the SEDAR website maintained by the Canadian Securities Administrators.

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.

Contacts:

Argentex Mining Corporation

Peter A. Ball

Executive Vice President Corporate Development

604-568-2496 (ext. 103) or 1-888-227-5285 (ext. 103)

604-568-1540 (FAX)
peter@argentexmining.com
www.argentexmining.com