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지질조사와 자원연구를 선도하는 한국지질자원연구원 korea institute of geoscience and mineral resouces

논문 상세정보

논문 상세정보
학회/학술지명 Goldschmidt 2019 주저자 유봉철
발표매체 학술발표 국가명 스페인
논문명 국문 구봉 금 광상의 금홍석 지화학
영문 Rutile geochemistry of Gubong Au deposit, Republic of Korea
발표일 2019.08.21
관련과제 북한 광물자원 탐사기술 실증 및 잠재성 평가 바로가기
초록 The Gubong Au deposit is located in the Chenan metallogenic province, one of the most important gold production areas in the Republic of Korea. This deposit is the richest gold deposit in the province and consists of five massive ribbon-banded quartz veins that fill fractures oriented northeast and northwest along fault shear zones in Precambrian metasedimentary rocks of the Gyeonggi massif.
Ores and alteration minerals of Gubong deposit are sericite, chlorite, epidote, illite, K-feldspar, plagioclase, biotite, quartz, calcite, magnetite, ilmenite, rutile, zircon, monazite, apatite, pyrite, gersdorffite, arsenopyrite, pyrrhotite, sphalerite, marcasite, chalcopyrite, galena and electrum.
Rutiles occur in alteration and mineralized zones. Trace element analyses in the rutiles in the two zones were performed using EPMA and LA-ICP-MS (193-nm ArF Excimer laser combined with a Elan 6100 quadrupole mass spectrometer). Concentration of trace elements from two zones are Mg (45.8~1923.1 ppm, 48.3~21519.8 ppm), Al (44.3~9328.6 ppm, 113.6~56660.2 ppm), Sc (<1.2~50.2 ppm, 2.2~13.8 ppm), V (2.2~79.1 ppm, 37.5~283.7 ppm), Mn (<1.0~699.9 ppm, 1.8~593.6 ppm), Fe (546.6~14717.7 ppm, 4364.7~109116.4 ppm), Zn (6.3~67.1 ppm, 7.0~420.3 ppm), Y (0.4~1043.2 ppm, 2.0~242.8 ppm), Nb (629.0~2703.5 ppm, 3024.9~3877.1 ppm), Sb (<1.5~8.5 ppm, 4.7~17.0 ppm), Ta (25.8~312.3 ppm, 355.1~624.7 ppm) and W (36.0~2737.9 ppm, 24.5~2654.5 ppm), respectively. Mg, Al, V, Fe, Zn, Nb, Sb and Ta concentrations in rutile from mineralized zone are higher than those from alteration zone.
We compared the trace element composition in rutiles from other major Korean ore deposits to compare hydrothermal fluid condition and to provide a geochemical tool for mineral exploration.

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