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News Release: April 18th, 2005

New Mexican Ag-Pb-Zn Project Acquired by Staking

Almaden Minerals Ltd. (Almaden) is pleased to announce that it has acquired by staking a 100% interest in the Santa Isabela property. The property covers a roughly 14,000 hectare area and is located in Coahuila State, Mexico. The project was identified in a regional helicopter-borne prospecting program and covers an a low-lying ridge located within 50 kilometers of the large Penasquito Ag-Pb-Zn deposit owned by Western Silver Corporation and the historic Concepcion del Oro polymetallic mining camp.

The Santa Isabela property is road accessible and covers an area of structurally controlled jasperoid replacement silicification and calcite veining traceable over 700 meters in outcrop and developed within a package of limestones. To date twenty four samples have been taken of oxidized jasperoid and calcite veined limestone returning zinc values up to 11.95% and averaging 4.68%, lead values up to 7.33% and averaging 1.94% and silver values up to 172 g/t and averaging 34.8 g/t.

Preliminary soil geochemical and induced polarization (IP) geophysical surveys were conducted along three lines, approximately 1 km long established at roughly 500 m intervals perpendicular to the ridge. Seventy-four soil samples were collected along the lines at 25 m spacings within the arc of the ridge and at 50 m intervals along the flats at its base. The strongest response for lead, zinc and silver was obtained from the central line. A continuous series of samples representing a width of 150 m yielded lead values >250 ppm (to 1.78%), zinc values >300 ppm (to 2.10%) and silver values >1 g/t (to 17.1 g/t). The preliminary pole-dipole IP survey identified a broad chargeability high that was most prominent on one line with chargeability values over 40 mV/V. This response likely indicates the presence of significant sulphides at depth.

Silver-lead-zinc mineralization at the Santa Isabela property is thought to represent the upper levels of a potentially much larger mineralized carbonate replacement (CRD) system at depth, likely identified by the IP survey described above. Although the work at the Santa Isabela property to date is preliminary in nature, it has identified an interesting and prospective CRD style target. Grades associated with the mineralization sampled are consistent with CRD style mineralization from the districts within the Mexican CRD Belt. The most notable of which is the nearby Conception del Oro mining district which is thought to have produced in excess of 40 Mt reportedly grading 12.8% Zn, 5.8% Pb, 275 g/t Ag, up to 1.5 g/t Au and up to 1.5% Cu. Western Silver Corporation has recently released a new resource estimate for its Penasquito deposit, located immediately west of the Concepcion del Oro camp, with a total measured and indicated sulphide resource of 309.75 Million tonnes grading 31.56 g/t Ag, 0.31% Pb and 0.78% Zn.

Samples were collected under the supervision of Bill Wengzynowsi, P.Eng., president of the consulting firm Archer Cathro and Associates (1981) Ltd., and Morgan Poliquin, M.Sc., P.Eng., a director of Almaden, and the qualified person on the project under the meaning of National Instrument 43-101. Samples were analysed at ALS Chemex Labs of North Vancouver, B.C., using conventional fire assay, and inductively coupled plasma atomic emission spectroscopy (ICP).

Almaden currently has 11 active joint ventures, including 7 in which other companies are carrying all costs in order to earn an interest in the projects. Almaden will continue with its successful business model of identifying exciting new projects through early stage grass roots exploration and managing risk by forming joint ventures in which partner companies explore and develop our projects in return for the right to earn an interest in them. Almaden is seeking a joint venture partner to advance the Santa Isabela property under similar terms to those of its present joint venture agreements.

 

ON BEHALF OF THE BOARD OF DIRECTORS
Duane Poliquin


The Toronto Stock Exchange has not reviewed nor accepted responsibility for the adequacy or accuracy of the contents of this news release which has been prepared by management. Statements contained in this news release that are not historical facts are forward looking statements as that term is defined in the private securities litigation reform act of 1995. Such forward -looking statements are subject to risks and uncertainties which could cause actual results to differ materially from estimated results. Such risks and uncertainties are detailed in the Company's filing with the Securities and Exchange Commission.

 

Almaden Minerals