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http://dx.doi.org/10.7854/JPSK.2014.23.1.001

Geological Structures and Mineralization in the Yeongam Mineralized Zone, Korea  

Ryoo, Chung-Ryul (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Park, Seong-Weon (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Lee, Hanyeang (Department of Geoenvironment Sciences, Konju National University)
Publication Information
The Journal of the Petrological Society of Korea / v.23, no.1, 2014 , pp. 1-15 More about this Journal
Abstract
The Yeongam mineralized zone is located in the southwestern part of the Korean peninsula, including the Sangeun, Eunjeok and Baramjai mines. This zone is located in the northeastern part of the Mokpo-Haenam-Yeongam volcanic circular structure. The 13 sites of quartz vein with mineralization are developed in the Sangeun-Eunjeok-Baramjai area, within rhyolitic welded tuff, showing N-S or NNW trend with highly dipping to the west. The quartz veins occur as a single vein or a bundle of veins with width of 1-5 cm in each. The existence of faults parallel to the quartz veins indicates that the faulting occurred before and after the development of quartz veins and mineralization. The quartz veins and mineralized zone are displaced by NW-trending sinistral strike-slip faults. The extension of the Sangeun-Eunjeok mineralized belt is traced to the south, following a NNW-trending tectonic line, and the Au-Ag contents are analysed in the 12 sites of quartz veins. Contents of gold and silver are 12.3 g/t and 1,380.0 g/t in Eunjeok mine, 2.7 g/t, 23.5g in Sangeun mine, and <0.1 g/t, 5.7 g/t in Baramjai mine respectively. Therefore, a highly Ag-Au mineralized zone is not developed in the southern part of the studied area.
Keywords
Yeongam mineralized zone; Eunjeok-Sangeun ore deposit; quartz vein; NNW trend; Ag-Au mineralization;
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