자원환경지질 (Economic and Environmental Geology)

  • 제42권6호
  • /
  • Pages.513-525
  • /
  • 2009
  • /
  • 1225-7281(pISSN)
  • /
  • 2288-7962(eISSN)
대한자원환경지질학회 (The Korean Society of Economic and Environmental Geology)
권호 표지

부영 금-은광상의 광석광물, 유체포유물 및 안정동위원소 연구

Ore Minerals, Fluid Inclusion and Stable Isotope Studies of the Buyeong Gold-silver Deposit, Republic of Korea

  • 이길재 (한국지질자원연구원 광물자원연구본부) ;
  • 유봉철 (한국지질자원연구원 광물자원연구본부) ;
  • 이종길 ((주)도화종합기술공사 지반공학부) ;
  • 지세정 (한국지질자원연구원 광물자원연구본부) ;
  • 이현구 (충남대학교 지질환경과학과)
  • Lee, Gill-Jae (Korea Institute of Geoscience and Mineral Resources) ;
  • Yoo, Bong-Chul (Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Jong-Kil (Geotechnical department, Dohwa Consulting Engineers Co., LTD.) ;
  • Chi, Se-Jung (Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Hyun-Koo (Department of geology and environmental sciences, Chungnam National University)
  • 발행 : 2009.12.28
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초록

부영 금-은광상은 백악기 고성층 내에 발달된 NS단층대의 열극을 충진한 석영맥광상이다. 이들 석영맥의 광화작용은 hypogene 시기와 supergene 시기로 구분된다. Hypogene 시기의 광물은 견운모, 황철석, 녹니석 및 녹염석으로 구성된 열수변질광물과 황철석, 자류철석, 섬아연석, 백철석, 황동석, 방연석 및 갈레노비스무타이트로 구성된 황화광물이 관찰된다. Supergene 시기에는 공작석, 침철석, 휘동석 및 섬아연석 산화물 등이 생성되었다. 유체포유물 자료에 의하면, 광화시기의 균일화온도와 염농도는 각각 $112{\sim}340^{\circ}C$, 0.2~7.9 wt.% NaCl 로서 광화유체가 천수의 혼입에 의한 냉각과 희석이 있었음을 지시한다. 황(3.2~3.9‰) 기원은 주로 화성기원과 일부 모암내의 황에서 유래된 것으로 해석된다. 산소(4.3~6.0‰)와 수소(-60~-64‰) 동위원소값의 자료로 볼 때, 이 광상의 광화유체는 천수 기원의 유체가 주종을 이룬 것으로 보이며 광화작용이 진행됨에 따라 기원이 다른 천수의 혼입이 작용한 것으로 해석할 수 있다.

The Buyeong gold-silver deposit consists of quartz veins that fill along the NS fault zone within Cretaceous Goseong formation. Mineralization can be divided into hypogene and supergene stages. Hypogene stage is associated with hydrothermal alteration minerals such as sericite, pyrite, chlorite, epidote and sulfides such as pyrite, pyrrhotite, marcasite, sphalerite, chalcopyrite, galena and galenobismutite. Supergene stage is composed of malachite, goethite, chalcocite, and sphalerite oxide. Fluid inclusion data indicate that homogenization temperatures and salinities range from 112 to $340^{\circ}C$ and from 0.2 to 7.9 wt.% NaCl, respectively. Sulfur(3.2~3.9‰) isotope composition indicates that ore sulfur was derived from mainly magmatic source as well as partly host rocks. The calculated oxygen(4.3~6.0‰) and hydrogen(-60~-64‰) isotope compositions indicate that hydrothermal fluids may be meteoric origin with some degree of mixing of another meteoric water for paragenetic time.

키워드

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