SOURCE: Oriental Minerals Inc.

February 07, 2007 09:00 ET

Oriental Minerals' Channel Sample Results Confirm Significant Grades of Tungsten, Silver, Copper and Tin

VANCOUVER, BC -- (MARKET WIRE) -- February 7, 2007 -- Oriental Minerals Inc. (TSX-V: OTL) is pleased to announce the results from the continuous-composited rock chip channel samples and geological mapping from above the Sangdong tungsten-molybdenum mine in South Korea. Significant results confirming the presence of silver-copper-tin-tungsten-bismuth-fluorine mineralization both within crosscutting fault structures and at the base of the Pungchon Limestone include:

10 metres of 56.9 g/t Ag, 2.5% Cu, 0.25% Zn, 1.0% F

8 metres of 0.34% W, 12.5 g/t Ag, 0.18% Cu, 113 ppm Mo, 703 ppm Bi, 425 ppm Sn, 3.3% F

The Company considers these results significant as further indication of the poly-metallic potential of the deposit and the potential for several other mineralized horizons above and below the partially-mined tungsten vein that was not previously recognized by prior operators at Sangdong. The Pungchon Limestone was previously regarded as waste rock at the mine.

The entire skarn package, locally about 150 metres thick, is currently being drill tested with a 9 hole fence with the first hole completed (see news release 02/02/2007) and results pending. This first hole was designed as a due diligence hole to test the mineralization of the overlying Pungchon Limestone, the various horizons within the skarn (within the Myobong Slate), including the 5-6 metre thick Main Vein that was previously in production, down into the deep molybdenum zone previously drilled by the Koreans.

* 30 metres @ 0.11% W, 243 ppm Mo, 0.14 g/t Au, 490 ppm Bi, 1.9% F (3 samples). This result is obtained from the very top of the exposed skarn outcrops of the Myobong Slate, just below its contact with the Pungchon Limestone.

* 20 metres @ 405 ppm W, 106 ppm Mo, 0.16 g/t Au, 630 ppm Bi (2 samples). This result is obtained from the very top of the exposed skarn outcrops of the Myobong Slate, just below its contact with the Pungchon Limestone.

* 10 metres @ 56.9 g/t Ag, 2.5% Cu, 0.25% Zn, 1.0% F (1 sample). This result is obtained from the Pungchon Limestone.

* 8 metres @ 0.34% W, 12.5 g/t Ag, 0.18% Cu, 113 ppm Mo, 703 ppm Bi, 425 ppm Sn, 3.3% F (2 samples). This result is obtained from a 10.5 metre wide north-northeast striking, steep west dipping fault structure cutting across the Pungchon Limestone.

* 2.5 metres @ 43.1 g/t Ag, 0.66% Cu, 630 ppm W, 810 ppm Bi, 337 ppm Sn, 2.8% F (1 sample). This result is obtained from a 10.5 metre wide north-northeast striking, steep west dipping fault structure cutting across the Pungchon Limestone.

* 10 metres @ 0.13% W (1 sample). This result is obtained from the very top of the exposed outcrops of the Jangsan Quartzite.

* 10 metres @ 31.8 g/t Ag, 0.13% W, 0.13% Cu, 0.12% Sn, 133 ppm Bi (1 sample). This result is obtained from the basal section of the Pungchon Limestone, near the contact of the skarn of the Myobong Slate.

* 2 metres @ 72.5 g/t Ag, 750 ppm W, 0.34% Cu, 222 ppm Bi, 743 ppm Sn, 0.86% Zn, 6.9% F. This result is obtained from a 2 metre wide east-west striking, steep north dipping fault structure cutting across the Pungchon Limestone.

* 2 metres @ 340 ppm W, 0.12% Cu, 133 ppm Bi, 277 ppm Sn (1 sample). This result is obtained from a 2 metre wide north-northeast striking, steep west dipping fault structure cutting across the Pungchon Limestone.

* 1 metre @ 750 ppm W, 964 ppm Sn, 0.15% Zn (1 sample). This result is obtained from a 1 metre wide east-west striking, steep north dipping fault structure cutting across the Pungchon Limestone.

The above results are in addition to the previously reported (January 15, 2007) results of:

* 44 metres @ 52.5 g/t Ag, 0.47% Cu, 940 ppm Sn, 488 ppm W, 275 ppm Bi and 4.9% F

* 40 metres @ 460 ppm W and 427 ppm Bi

* 10.5 metres @ 13 g/t Ag, 0.37% Cu, 815 ppm Sn, 433 ppm W, 127 ppm Bi, 3.1 % F

Note: Samples are continuous composited rock chip channel samples and were submitted to ALS Chemex laboratory in Brisbane, Australia and analyzed by methods Au-AA25, ME-ICP41s, Ag-OG46, Cu-OG45, F-ELE-81a, F-ELE82 and XRF-ME05.

The Sangdong Mine map is accessible by clicking onto the link below: http://www.usetdas.com/maps/orientalminerals/OTLsangdongmap.pdf

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QUALIFIED PERSON

The qualified person for the purposes of this release is Mr. Mark Dugmore.

On behalf of the Board of Directors,
Damien Reynolds
Chairman and Director
About Oriental Minerals Inc.

Oriental Minerals is a Canadian based exploration company exploring for world-class mineral deposits in South Korea. The Company's current projects include tungsten-molybdenum, base metals and gold-silver properties with significant known mineralization and excellent regional potential.

South Korea is an independent country with strong ties to the USA and a key trading partner with Canada and Australia. The country has an excellent infrastructure, established and workable Mining Laws, and available trained mining workforce.

These factors combined with an in country bi-lingual team, assists OTL in capturing a first class country-wide, diversified minerals portfolio.

Statements in this news release, other than purely historical information, including statements relating to the Company's future plans and objectives or expected results, constitute Forward-looking statements. Such statements are based on numerous assumptions and are subject to all the risks and uncertainties inherent in the Company's business, including risks related to mineral exploration and development. Consequently, actual results may vary materially from those described in the forward-looking statements.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.

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