Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Geology and Mineralization in Trapiche Cu-Mo Deposit, Apurimac State in Southeastern Peru

페루 남동부 아뿌리막주 트라피체 동-몰리브데늄 광상의 지질 및 광화작용

  • Yang, Seok-Jun (Mineral Resources Research Department, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Heo, Chul-Ho (Mineral Resources Research Department, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, You-Dong (Mineral Resources Research Department, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 양석준 (한국지질자원연구원 광물자원연구본부 광물자원연구실) ;
  • 허철호 (한국지질자원연구원 광물자원연구본부 광물자원연구실) ;
  • 김유동 (한국지질자원연구원 광물자원연구본부 광물자원연구실)
  • Received : 2015.11.02
  • Accepted : 2015.12.24
  • Published : 2015.12.28
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Abstract

Trapiche project corresponds to the advanced exploration stage which is thought to be a part of various porphyry copper deposits occurring in the margin of Andahuyalas-Yauri metallogenic belt. This deposit is genetically related to the monzonitic porphyry intrusion and Oligocene breccia pipe. Mineralization consists of primary sulfides such as pyrite, chalcopyrite, bornite, and molybdenite and secondary sulfides such as chalcocite, covellite and digenite. It occurs malachite, tenorite and cuprite as copper oxide. As a result of lixiviation or enrichment process, mineralization shows untypical zonation structure. Breccia and porphyry areas characterize the vertical zonation patterns. In the northern area, lixiviation zone, secondary enrichment zone, transitional zone and primary mineralized zone are distributed in northern area. In the western area of deposit, oxidation zone and mixed zones are narrowly occurred. Inferred resources of deposit is estimated to be 920 Mt @ 0.41% Cu with the cut-off grade of 0.15%.

트라피체 프로젝트는 현재 탐사단계 중 후기(Advanced exploration)단계의 프로젝트이며 안다우아일라스-야우리 광상구 연변에 나타나는 다양한 반암 광상 중 일부라고 볼 수 있다. 이 광상은 몬조나이트 반암의 관입과 관계가 있으며, 또한, 올리고세 각력 파이프와 밀접한 관계를 가지고 있는 광상이다. 광화작용은 일차 유화광물인 황철석, 황동석, 반동석 및 휘수연석으로 구성된다. 2차 유화광물인 휘동석, 코벨라이트, 다이게나이트가 산출되며 산화동으로서 공작석, 흑동석, 적동석등이 산출된다. 침출작용(lixiviation)이나 부화과정 결과로서, 광화작용은 비전형적인 누대구조를 보여주기도 한다. 각력과 반암이 나타나는 구역에서는 수직적인 누대구조를 보여주는데, 북쪽 인근에서는 침출대, 2차부화대, 전이대 및 초생광화대가 나타나고 광상의 서쪽에서는 산화대 및 혼합대가 좁게 나타난다. 광상의 추정자원은 920 Mt @ 0.41% Cu이며 한계품위는 0.15%로 산정하고 있다.

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References

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