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Argentex Defines 23.6 Million Ounces Ag Eq. @ 132.4 g/t Ag Eq. Indicated Mineral Resource Estimate at Ping¯ino Silver-Gold Project By [email protected] (IRW-PRESS)
Argentex Defines 23.6 Million Ounces Ag Eq. @ 132.4 g/t Ag Eq. Indicated Mineral Resource Estimate at Ping¯ino Silver-Gold Project

Vancouver, BC, Canada January 31, 2013 - Argentex Mining Corporation ("Argentex" or the "Company") (TSX-V: ATX, OTCQB: AGXMF) is pleased to announce the preliminary results of a National Instrument (NI”) 43-101 compliant Mineral Resource Estimate (the Report) by Mine Development Associates ("MDA") of Reno, Nevada for the Companys 100%-owned Ping¯ino Silver-Gold Project, located in Santa Cruz province, Argentina.

"These results confirm managements belief that the Ping¯ino Project contains a significant high-grade silver and gold resource in veins that outcrop at surface,” commented Mike Brown, President and CEO of Argentex. With close to 84% of the resource falling into the Indicated category, we are accelerating internal engineering studies and completing initial metallurgical studies. Our decision to prepare a new Preliminary Economic Assessment based on this Report will depend upon the outcomes of these studies. Our immediate goal is to determine Ping¯inos economic potential as an open pit mining operation. We are confident that we can continue to add high grade near surface mineral resources as we continue to drill the known vein systems, although this is not an immediate priority.”

Highlights include:

Ping¯ino Exploration Historical Review

Argentex began exploration activities at Ping¯ino in late 2004. Between 2004 and 2009, the Company completed five phases of exploration, which included 269 diamond drill holes (30,037 meters), 311 trenches, geological mapping, geochemical sampling and geophysical surveys. The exploration data provided sufficient density to interpret the basic structural geology from which a resource estimate was made on nine of the known veins. That phase of work was reported in the National Instrument (NI”) 43-101 compliant Report Resource Estimate for the Ping¯ino Silver, Zinc, Indium, Lead, Gold Occurrence”, dated October 28, 2009 (News Release, October 29, 2009).

Argentex subsequently evaluated the data used in the 2009 resource estimate and undertook scoping-level studies of the mining and processing potential of the property. These evaluations led to the NI 43-101 compliant Ping¯ino Property Preliminary Economic Assessment 2011”, dated August 5, 2011, (results reported in News Release, March 22, 2011).

From 2010 to 2012, Argentex completed three additional exploration programs (Phase VI through to VIII), which included 153 diamond drill holes (16,838 metres), 255 reverse circulation drill holes (RC”) (19,610 metres) and 38,300 meters of trenching, all of which improved the geological interpretation of the vein structures. The Company also initiated metallurgical studies (ALS Ammtec and G&T Metallurgical Services Ltd.) with the goal of identifying preliminary recoveries of the oxide, transition and sulphide zones, and to further assist in understanding the Ping¯ino vein system. The phase VI VIII exploration programs were focused on defining and expanding resources in the oxide and transition zones of known vein systems, and to test identified vein structures having the potential to build resources.

The resource model is based on a database of 677 drill holes (66,455 metres), and 744 surface trenches (42,019 metres), all completed between 2004 and 2012 in exploration phases I through VIII. Of the 36 veins drill tested to date only 8 of the most intensely explored veins (Marta Este, Marta Norte, Marta Centro, Marta Noroeste, Marta Sur, Ivonne, Marta Oeste and Tranquilo) were selected to be included in the resource model. These eight veins were focused on in recent drill programs to define near surface high grade silver and gold oxide material. This is a first step towards defining an open pit minable resource as part of a future Preliminary Economic Assessment (PEA).

The Company believes there is significant scope for increasing the mineral resource reported at Ping¯ino. Six other veins were evaluated for potential resources but will require additional drilling before they qualify. Total metal silver-equivalent ounces could range from four to eight million equivalent ounces, with silver grades ranging from 70 to 90 grams per tonne and gold grades ranging from one to two grams per tonne. This range of potential quantity and grade is based on the mapped strike length of the veins and the existing, albeit relatively sparse, drill and trench sample assays. The potential quantity and grade are conceptual in nature, as there is insufficient work to define a mineral resource, and it is uncertain if further exploration will result in the targets being delineated as a mineral resource. The remainder of the tested (and untested) veins will also require additional exploration and drilling before their resources can be estimated.

A best-practices and increasingly stringent protocol for the collection, preparation and submission of rock samples for analysis was followed throughout the phases of exploration at Ping¯ino. All samples were analyzed by Acme Analytical Laboratories (Acme Labs”) except for the 2006 drilling of Phase 2 which were sent to Alex Stewart (Assayers), Argentina, S.A. The current analytical protocol, which was largely instituted in 2007 for the Phase V drilling, and which constitutes the bulk of the assay data that contributed to the resource model, begins with all field samples being submitted to Acme Labs preparation laboratory in Mendoza, Argentina. From there, the sample pulps were sent to its laboratory in Vancouver for multi-element ICP-MS analysis (1DX procedure). Samples overlimit in silver, lead, zinc or copper were rerun by a high-detection limit ICP-ES procedure (Acme Labs code 7AR). Samples overlimit in silver from that procedure and, more recently, all gold assays >300 ppb were rerun by fire assay (G6 procedure). Acme Labs is an accredited ISO 9000:2001 full-service commercial laboratory with its head office in Vancouver. Quality control was maintained by submitting field blanks and duplicates and by reviewing laboratory results of its own replicates, duplicates and analytical standards. The full QA/QC program was further evaluated by J.David Williams, P.Eng. and reviewed by MDA.

About Ping¯ino

Argentex's 10,000-hectare advanced silver and gold exploration Ping¯ino project 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.

The Ping¯ino system has grown to 70+ individual veins, with a combined strike length approaching ~113 line-kilometers. The Ping¯ino project is unique within the Deseado Massif region of Santa Cruz province in that it contains two different and spatially distinct types of mineralization, one precious metal and the other sulphide-rich polymetallic. The Company continues to evaluate the geological model of sulphide-enriched potentially mineralized intrusives at depth, forming the probable source for the polymetallic veins exposed on surface.

Ping¯ino 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.

The mineral resource estimate was prepared by Steven Ristorcelli, C. P. G., Principal Geologist at Mine Development Associates in Reno, Nevada in accordance with NI 43-101, and he is an independent "Qualified Person" as defined by NI 43-101. Mr. S. Ristorcelli has approved the details of the resource estimate as contained herewith.

All other content of this press release has been reviewed and approved by Mr. J. David Williams, P. Eng., and he is an independent "Qualified Person" as defined by NI 43-101.

The Company expects a complete copy of the Report will be filed on SEDAR within 45 days of this press release.

About Argentex

Argentex Mining Corporation is an exploration company focused on advancing its Ping¯ino silver-gold project in Santa Cruz, 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 OTCQB. 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.

On behalf of Argentex Mining Corporation:

"Michael Brown"
President and CEO

For additional information please contact:

Peter A. Ball
EVP Corporate Development

Phone: 604-568-2496 (ext. 103) or 1-888-227-5285 (ext. 103)
Email: [email protected]

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 those concerning managements belief that the Ping¯ino project contains a significant high-grade silver and gold resource, its confidence that it can continue to add high grade near surface mineral resources as it continues to drill the known vein systems, its view that polymetallic mineralization provides potential for additional economic upside, and its belief that there is significant scope for increasing the resource with additional drilling on other veins, with total metal silver-equivalent ounces that could range from four to eight million equivalent ounces, with silver grades ranging from 70 to 90 grams per tonne and gold grades ranging from one to two grams per tonne.

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, the availability of the Companys consultants 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 Information Form and other public disclosure documents filed on the SEDAR website maintained by the Canadian Securities Administrators and the EDGAR website maintained by the Securities and Exchange Commission.

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