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A World-class Tungsten-Molybdenum Deposit
Located south-east of Seoul, the Sangdong tungsten-molybdenum mine was one of the world's largest producing mines between 1947 and 1992. The mine closed prematurely in 1992 due to low metal prices. The Sangdong Mine had historical production rates of 600,000 tpa mainly from the six-metre thick Main Vein. Drilling by KORES during 1980-1987 discovered a deep molybdenum deposit below the remaining tungsten skarn resources.
Both tungsten and molybdenum prices have increased significantly since the mine's closure. Tungsten has risen to US $70/lb from US $4/lb, while molybdenum prices have soared to US $38/lb up from less than US $2/lb. Price increases are based on favourable supply and demand balances, making this a highly attractive deposit for re-evaluation. In March 1989 KORES (Korean Engineering Co.) reported a tungsten historial "remnant ore reserve" of 189 million pounds of tungsten oxide (WO3) from 15.6 million tonnes grading 0.5% WO3 per tonne in the "main ore body" and 1.4 million tonnes at 0.55% WO3 in the "east ore body". Extension zones to the west also report significant mineralization at relatively shallow depths (2.3Mt @ 0.5% WO3), with a total strike length of known mineralization of approximately 10 kilometres. recent work Recent Work at Sangdong
During the latter half of 2008, drilling operations were halted due to lack of funding and will resume upon appropriate funds being raised.Oriental Minerals Inc. (Oriental) retained Wardrop Engineering Inc. (Wardrop) to produce a National Instrument 43-101 (NI 43-101) compliant resource estimate and technical report for the Sangdong Property. The purpose of this report is to support the first time disclosure of mineral resources for the Sangdong Property by Oriental. Wardrop NI 43-101 March 2008 Report can be downloaded here. Mineralization occurs within skarn-altered horizons in the Cambrian-age Myobong Shale Formation, and to a minor extent, within the overlying Pungchon Limestone and underlying Jangsan Quartzite, and is primarily associated with concordant and cross-cutting quartz veins. An extensive database of technical information has been compiled by Oriental. Independent Geological consultants Watts, Griffis McOuat have completed a technical report on Sangdong compliant to National Instrument 43-101. The Company has a multi-pronged evaluation strategy at Sangdong which includes:
 Longitudinal Section (Looking NE)
work program 2007 Work Program
Phase I Drilling Program (4,100 metres)The Phase I Drilling Program is designed to test the zone with an initial ten drillhole fence across the Sangdong deposit. Work will also include compilation and review of old mining data and a surface sampling program. Phase I Results Oriental Minerals commenced drilling of hole SD-01 at the Sangdong Tungsten-Molybdenum Mine on November 17, 2006 and reached total depth of 781 metres on February 6, 2007. SD-01 was a due diligence drill hole and was designed to fully test the tungsten skarn and deep molybdenum deposits. The hole was sampled on a split core, one-metre-interval basis, with samples submitted to ALS Chemex Laboratory in Brisbane, Australia for analysis. Results will be received in installments and announced when available.  Phase I Drilling Program To view results from Oriental's work program please review the company's news release dated February 2, 2007. Surface geological mapping and channel rock chip sampling completed during late 2006, has highlighted the polymetallic nature of mineralization present at Sangdong. This sampling program has also identified silver-copper mineralized fault structures and stratabound horizons within the Pungchon Limestone cover rocks previously regarded as waste rock.  Rock Chip Sample Map Phase II Drilling Program 16,800 metres) Phase II will consist of drilling out the main area(s) of interest at 100 m x 100 m hole spacing, metallurgical and engineering studies, as well as completion of a scoping study. Oriental has mobilized 3 diamond core rigs from Jina Engineering and 2 diamond and reverse circulation drill rigs from Australia (Zen Drilling) to complete this program.
To view the detailed drill results of the April 9th , 2008 News Release and an updated Long Section and Drill Plan, please click here.
To view the updated Longitudinal Section and Drill Plan of the Novemeber 26, 2007 News Release, please click here.
technical reports
Click to view: Wardrop Technical Report on the Sangdong Property Skarn Deposit, March, 2008 (PDF 1.22MB)
Technical Report on the Sangdong Property Skarn Deposit, Republic of Korea (PDF 1.22MB)
Maps and Photos
To view the updated Drill Plan of the Dec 14, 2007 News Release, please click here. |
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