Soho Resources Corp.

Soho Resources Corp.

April 20, 2010 11:39 ET

Soho Resources Achieves Recoveries of 85.6% Gold, 90.1% Silver, 87.9% Copper, 86.7% Lead and 88.1% Zinc in Recent Metallurgical Testing Results From Its Tahuehueto Project

VANCOUVER, BRITISH COLUMBIA--(Marketwire - April 20, 2010) - Soho Resources Corp. (TSX VENTURE:SOH) ("Soho" or the "Company") is pleased to announce recently completed metallurgical testing results for its Tahuehueto Project located in Durango, Mexico.

In October 2009, Soho Resources Corp prepared five metallurgical composites, all from diamond drill core samples, from the Tahuehueto Project in the state of Durango, Mexico.

The composites were prepared to reflect the known resource grades as determined in the company's most recent 43-101 compliant mineral resource calculation, prepared by Scott E. Wilson Consulting, Inc. (see new release dated May11, 2009). The grades of the prepared composites are tabled below.

Zone Au g/t Ag g/t Cu % Pb % Zn %
Cinco de Mayo 1.70 57.9 0.45 0.92 2.29
El Creston 2.89 37.3 0.36 1.41 2.11
El Perdido 1.42 35.1 0.25 1.07 1.50
El Catorce 1.53 26.9 0.07 0.81 1.97
Overall Composite (weighted average of all above zones) 2.11 37.7 0.28 1.12 2.02

Each composite was made up of material from mineralized intersections in not less than five separate drill holes from spatially different parts of the mineralized zone in question. The overall composite represents the weighted average of the contribution of each of the four individual zone composites to the total May 11th 2009 mineral resource.

At current metal prices (Kitco – April 20, 2010), the contained metals value in the overall composite is $195/tonne, equally split between the precious and base metals.

The composites have been subjected to 12 bench scale flotation tests by Westcoast Mineral Testing of North Vancouver, B.C.

The most recent and best test result to date was on the overall composite, yielding the following overall recoveries:

Composite   Rougher Recovery %
  Test Au Ag Cu Pb Zn
Overall composite 10-16 85.6 90.1 87.9 86.7 88.1

Testing on the individual zone composites yielded the following results.

Zone   Rougher Recovery %
  Test Au Ag Cu Pb Zn
Cinco de Mayo 10-06 91.5 91.4 88.6 98.8 97.2
El Creston 10-07 83.4 78.7 81.6 87.7 53.2
El Perdido 10-08 82.5 74.2 84.8 93.6 64.9
El Catorce 10-09 87.2 83.5 73.9 98.3 87.7
Arithmetic average   86.2 82.0 82.2 94.6 75.8

Although overall recoveries are important, the distribution of the payable metals into the most advantageous marketable products is the ultimate goal of any metallurgical program.

The following has been determined on the overall composite:

  • 77.0% of the lead has been recovered into a flotation concentrate grading 53.9% Pb, 96 g/t Au, 1,007 g/t Ag, 7.86% Cu, and 8.1% Zn.
  • Initial testing to separate the bulk copper / lead concentrate, was encouraging and partially successful. In addition to the lead concentrate described above, the "copper" concentrate graded 10.0% Cu, 50 g/t Au, 1,154 g/t Ag, 4.6% Pb, and 22.0% Zn. Although the zinc grade is higher than that of the copper, it is anticipated that this product would be marketed as a copper concentrate.
  • Ongoing testing is evaluating the potential to shift the 7% of the zinc that reports to the copper concentrate, into the zinc flotation circuit, since otherwise it is a diluent in the copper concentrate, and in effect could become a penalty component.
  • The zinc cleaner stage concentrate, containing 63.0% of the zinc and grading 55.3% Zn is of a good marketable grade.

Reagent usage is consistent with industry norms for this type of base metal deposit. Zinc sulphate and sodium cyanide, when used together, are effective sphalerite (zinc mineral) depressants, as was sodium cyanide in the copper / lead separation stage.

Future testing will investigate:

  • The role of finer primary grinding than the previous 40 – 60% passing 200 mesh
  • Alternative dosages of the above depressants.
  • Alternative depressants in an attempt to improve the distribution of the base metals into their respective concentrates.
  • Potential to achieve improved results by separately processing material from the four zones.

Note that some of the composites exhibit modest oxidation of the based metals, averaging < 5%. That portion of the base metal minerals and any associated precious metals are not recoverable.

The mineral processing portion of this news release has been prepared and approved by Gary Hawthorn, P.Eng (BC) the principal of Westcoast Mineral Testing Inc, and an independent Qualified Person as defined by NI 43-101.

Mr. Ralph Shearing, P.Geol, President and CEO of the company, is responsible for the preparation of this news release.


Ralph Shearing, Chief Executive Officer

WARNING: The Company relies upon litigation protection for "forward-looking" statements. This News Release may contain forward-looking statements including but not limited to comments regarding the timing and content of up-coming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements. Soho Resources Corp. relies upon litigation protection for forward-looking statements.

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