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To: LoneClone who wrote (17452)	4/9/2008 4:25:11 PM
From: LoneClone	Read Replies (1) \| Respond to of 194034

Oriental Continues Engineering Work and Drilling at Sangdong Tungsten-Molybdenum Project Wednesday April 9, 4:10 pm ET ca.us.biz.yahoo.com VANCOUVER, BC--(MARKET WIRE)--Apr 9, 2008 -- Oriental Minerals Inc. (CDNX:OTL.V - News) is pleased to announce further results from an additional 12 holes from the on-going drill program at the Sangdong tungsten-molybdenum project in South Korea, including an interval grading 0.97% WO3 and 0.95% MoS2 over 5 metres. The Company has also received geotechnical recommendations for various slopes within the anticipated open-pit and an assessment of potential tailings management technologies and site alternatives, while metallurgical work continues. Oriental Minerals has completed 68 holes at Sangdong and 5 drill rigs will continue to operate at the site over the next few months. The Preliminary Economic Assessment (PEA) for Sangdong remains on-schedule for completion by Wardrop Engineering in the third quarter of calendar 2008. The resource estimate updated on March 17th will be updated with the results announced today for use in the Sangdong PEA. Significant drill results highlights are as follows: ---------------------------------------------------------------- Drillhole Interval length WO3 Grade MoS2 Grade From-to ---------------------------------------------------------------- SD-29 78 metres 0.11% 0.09% 198m - 276m ---------------------------------------------------------------- 62 metres 0.14% 346m - 408m ---------------------------------------------------------------- SD-39 19 metres 0.28% 0.02% 0m - 19m ---------------------------------------------------------------- 40 metres 0.13% 0.06% 41m - 81m ---------------------------------------------------------------- 6 metres 0.15% 224m - 230m ---------------------------------------------------------------- SD-44 4 metres 0.23% 0.01% 3m - 7m ---------------------------------------------------------------- SD-47 24 metres 0.25% 0.02% 66m - 90m ---------------------------------------------------------------- 9 metres 0.16% 0.04% 127m - 136m ---------------------------------------------------------------- 7 metres 0.22% 0.03% 143m - 150m ---------------------------------------------------------------- SD-48 5 metres 0.97% 0.95% 0m - 5m ---------------------------------------------------------------- SD-51 23 metres 0.19% 0.04% 0m - 23m ---------------------------------------------------------------- SD-52 24 metres 0.15% 0.04% 0m - 24m ---------------------------------------------------------------- SD-53 17 metres 0.20% 0.01% 107m - 124m ---------------------------------------------------------------- 21 metres 0.15% 0.01% 159m - 180m ---------------------------------------------------------------- SD-54 8 metres 0.13% 130m - 138m ---------------------------------------------------------------- These results continue to indicate significant mineralization, with a number of positive results occurring right at surface, and other results providing additional confirmation of the deep molybdenum resource which underlies the Sangdong tungsten-molybdenum deposit under assessment. No significant results were reported by 3 of the 12 holes released today. The 3 holes targeted potential extensions to the known mineralization at Sangdong, as did hole SD-39. The Sangdong deposit remains open in multiple directions and further step-out holes are planned. Complete details of the above drill intersections, using a 0.1 WO3% Equivalent cut-off, an updated Drill Status Table and an updated Drill Program Map can be found on the Company's website at www.orientalminerals.com. Engineering Update Metallurgy: Approximately 600 kg of sample is currently being tested at SGS in Cornwall, UK under the supervision of Wardrop. This Phase 1 test work is focused on mineral liberation and recovery. A series of QEMSCAN mineralogical analysis have already been completed and the Phase 1 testing has now advanced to the scoping separation tests, which should be completed early in the third quarter of calendar 2008. Towards the latter part of 2008, the Phase 2 metallurgical testing program will commence, which will focus on further flotation tests and involve generating larger quantities of concentrate to allow cleaning tests for producing high quality tungsten and molybdenum concentrates. Pit Slope Geotechnical: A Korean firm, Nexgeo Inc., has completed a structural evaluation of the mine site, undertaken a series of geotechnical strength tests on core samples, and developed pit slope criteria for use in the PEA. Pit slopes recommendations ranged from 50 deg to 63 deg. Tailings & Waste Rock: AMEC Earth & Environmental have completed an assessment of tailings siting alternatives and tailings technology alternatives (conventional tailings, thickened tailings, and filtered tailings) and have provided recommendations that filtered tailings or thickened tailings co-disposal approaches merit further study. Further review of the tailings alternatives will be done as part of the PEA once waste volumes are defined and the metallurgical test work provides some data on the tailings properties. On behalf of the Board of Directors, Ian Fodie, Lead Director + 604-681-5755 QA/QC Drill samples are 1-metre split PQ, HQ or NQ core or 1-metre split RC. The samples were prepared at the on-site preparation facility and pulps were submitted to ALS Chemex laboratory in Brisbane, Australia and analyzed by Ore Grade Method XRF-ME05, Au-AA21, ME-ICP41s and Ag-OG46. Quality Control: Blanks, Standards and Coarse and Pulp Duplicates samples were routinely inserted with the drill samples at random intervals. Blank samples were clean, indicating no cross contamination in the samples. All results confirm analysis of Standards and Coarse Duplicates are within the normal bounds of acceptable error of +/- 5%. Pulp Duplicate samples processed by another independent laboratory are also within the normal bounds of acceptable error of +/- 5%. QUALIFIED PERSON This Press Release has been prepared by Oriental Minerals Senior Geologist Heyward Bates. Heyward Bates is a member of the AusIMM with over ten years' relevant experience, and is the Qualified Person for the purposes of this release. 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. Distributed by Filing Services Canada and retransmitted by Marketwire Contact: For More Information Contact: Spiro Kletas Investor Relations + 604-681-5755 Email Contact orientalminerals.com Source: Oriental Minerals Inc.