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The Results of Drilling in Weondong Mine Area, the Taebaegsan Mineralized District, Republic of Korea

강원도 태백산지역 원동광산 시추탐사연구

  • Lee, Jae-Ho (Korea Institute of Geoscience and Mineral Resources)
  • Received : 2011.06.29
  • Accepted : 2011.08.18
  • Published : 2011.08.28

Abstract

The Taebaegsan Mineralized District is the most prospective region for the useful mineral commodities such as a coal, non-metallic, metallic mineral in South Korea. From a general point of view, Cambro- Ordovician limestone formations, Myobong slate and Pungchon (Daegi) limestone, are the most fertilizable formations in the Taebaegsan Mineralized District. The geology around Weondong mine area consists mainly of Carboniferous-Triassic formations and Cambro-Ordovician formations intruded by rhyolite/quartz porphyry. The great overthrusted fault of N40~$50^{\circ}E$ direction, so called Weondong overthrust fault, is observed in the central part of the mine area and the NS fault system cuts the overthrusted fault. By postulating from the favorable geological and structural condition around Weondong area, the possibility of deep seated hidden ore bodies is expected. In 2010, on the basis of the results of LOTEM and CSAMT survey, the cross-hole survey was performed for the investigation of the hidden polymetallic ore body in the deep parts of the Weondong mine area and the grade of the newly-discovered orebody is as follows; (1) The cut-off grade for lead-zinc 3%; an weighted average grade 5.50% (2.7 m), (2) The cutoff grade for copper 0.1%; an weighted average grade 0.91% (14.65 m), (3) The cut-off grade for iron 30%; an weighted average grade 38.18% (3.3 m), (4) $WO_3$ for each cut-off grade(0.01%, 0.05%, 0.1%); an weighted average grade 0.29 wt. % (8.8 m), 1.15 wt. % (2.1 m), 1.97 wt. % (1.2 m), (5) $MoS_2$ for each cut-off grade(0.01%, 0.1%); an weighted average grade 0.15 wt. % (6.3S m), 0.28 wt. % (3.15 m), (6) $Ta_2O_5$ for each cut-off grade (0.01%, 0.1%); an weighted average grade 0.13% (19.S m), 1.11% (1.8 m), (7) $Nb_2O_5$ for each cut-offgrade (0.01%, 0.1%); an weighted average grade 0.06% 11.5 m), 0.15% (3.0 m).

Keywords

Cambro-Ordovician limestone formations;Weondong overthrust fault;polymetallic skarn deposit;drilling survey;weighted average grade

Acknowledgement

Grant : 국내 금속광(Cu, Pb, Zn, Au 등) 부존량 확보를 위한 개발 가능성 평가

Supported by : 한국지질자원연구원

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Cited by

  1. U-Pb(SHRIMP) and K-Ar Age Dating of Intrusive Rocks and Skarn Minerals at the W-Skarn in Weondong Deposit vol.26, pp.3, 2013, https://doi.org/10.9727/jmsk.2013.26.3.161
  2. Spectral characteristics of minerals associated with skarn deposits: a case study of Weondong skarn deposit, South Korea vol.20, pp.2, 2016, https://doi.org/10.1007/s12303-015-0043-0