Oremex receives excellent silver recovery results

www.oremex.com

VANCOUVER, Sept. 20 /CNW/ - Oremex Resources Inc. is pleased to announce
that it has received excellent preliminary metallurgical silver recovery
results from the bottle roll leach test program (conducted by McClelland
Laboratories, Inc., located in Sparks, Nevada) on its 40 million ounce Tejamen
silver property. The leaching program was comprised of bottle roll leaching
tests on drill cuttings collected from the approximate 30,000 meter percussion
drill program. The samples selected represent the broad range of material in
the deposit, covering the low-grade material as well as the high-grade
material in both zones (Cerro Prieto and Los Mantos) of the Tejamen property.
Each sample was tested in an "as received" state and then ground to 80% minus
75 microns (200 mesh) for additional testing. Silver extraction averaged about
60% for all twelve tests (six "as received" and six "minus 75 microns"). This
recovery is considered to be very good (see next paragraphs) for the short
time frame (only 4 days) utilized for bottle roll testing.

Mr. Jack McPartland, Metallurgist and Vice President Operations for
McClelland Laboratories, Inc., commented on the results of the Oremex test
program:

"Silver recovery rates by cyanidation are typically substantially slower
than gold recovery rates. Consequently, in general, short term (1 to 4
day) bottle roll test silver recoveries are often substantially lower
than obtained during longer term (60 day+) column leach testing of the
same samples, at the same feed size. Because of differences in leach
cycle duration, ultimate commercial heap leach silver recoveries often
are somewhat higher than column test silver recoveries (leached under the
same conditions - feed size, cyanide concentration, etc.) on the same
ore. Silver recovery rate data from the bottle rolls conducted on the
Tejamen cuttings samples show that silver extraction was progressing at a
slow, but significant rate, when leaching was terminated after 4 days of
leaching. These results indicate that silver recovery will improve with a
longer leaching cycle."

Based on the foregoing, and experience at actual silver heap leach
operations, a full scale heap leach operation at Tejamen might expect silver
recoveries in the range of 65% to 75% (based on three to nine months of
leaching). As a result of the excellent preliminary tests, Oremex plans to
commence column leach tests, which will be conducted over 60 days, as opposed
to the short-term (4 days) bottle roll tests.

Ross Glanville, PEng is the qualified person responsible for and has
verified the above data.

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