Primary Dispersion of Elements in Altered Wallrocks around the Gold-bearing Quartz Veins at the Okgye Mine

옥계 함금석영맥광상 주변모암에서의 원소들의 일차분산

  • Hwang, In Ho (Dept. of Mineral and Petroleum Eng., Seoul National Univ.) ;
  • Chon, Hyo Taek (Dept. of Mineral and Petroleum Eng., Seoul National Univ.)
  • 황인호 (서울대학교 공과대학 자원공학과) ;
  • 전효택 (서울대학교 공과대학 자원공학과)
  • Received : 1994.11.15
  • Published : 1994.12.30

Abstract

Geochemical studies on gold-bearing quartz veins and wallrocks from the Okgye mine were carried out in order to investigate the primary dispersion patterns of gold and associated elements and to quantify the dispersion width of elements with distance from the gold-bearing quartz veins. Gold-bearing quartz veins occur in basaltic trachyandesite of unknown age. Enrichment of $k_2O$, MnO, Au, As, Rb, Sb, Pb, Zn, Cu, Ag and Cd, and depletion of $Na_2O$ and Sr are found in altered wallrocks. The ratio of $k_2O(k_2O+Na_2O)$, alteration index for trace elements, and Rb/Sr in altered wallrocks are increased, whereas Sr/CaO ratio is decreased with approach to the gold-bearing quartz veins. The widths of primary dispersion range from 17 cm to 155 cm. The relative dispersion width increases in order Au=Cu=Zn=Ag=Cd$k_2O$=Rb and Ba< $Na_2O$ $Na_2O$, As, Sb, Sr, Pb, Au, Cu, Zn, Ag and Cd, and a quadratic function for $k_2O$, MnO, Rb and Ba.

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Acknowledgement

Supported by : 과학재단