한국광물학회지 (Journal of the Mineralogical Society of Korea)

  • 제24권4호
  • /
  • Pages.253-263
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  • 2011
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  • 1225-309X(pISSN)
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  • 2288-7172(eISSN)
한국광물학회 (The Mineralogical Society of Korea)
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뉴칼레도니아 니켈 라테라이트 광석 내 가니어라이트의 광물학적 특징

Mineralogy of Garnierite from New Caledonian Ni Lateritic Ore

  • 조현구 (경상대학교 지구환경과학과 및 기초과학연구소) ;
  • 김순오 (경상대학교 지구환경과학과 및 기초과학연구소) ;
  • 김상배 (한국지질자원연구원 광물자원연구본부)
  • Cho, Hyen-Goo (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University) ;
  • Kim, Soon-Oh (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University) ;
  • Kim, Sang-Bae (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 투고 : 2011.11.09
  • 심사 : 2011.11.24
  • 발행 : 2011.12.31
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초록

뉴칼레도니아 Nakety, Kouaoua, Ouaco 니켈 라테라이트 광상에서 수입하는 가니어라이트 광석의 광물학적 특성을 광학현미경 관찰, X-선 회절 분석과 전자현미분석에 의하여 연구하였다. 녹색 가니어라이트 광석은 교질상, 세포상, boxwork 조직 등 지표 부근의 저온에서 침전에 의한 조직을 잘 나타낸다. 이 광석의 니켈 광석광물은 대부분 니켈 함유 활석~윌렘사이트 계열 광물이며, 일부 리자다이트가 포함되어 있다. 니켈 함유 활석~윌렘사이트 계열 광물 내 NiO의 함량은 Ouaco (평균 40.63%), Nakety (평균 28.58%), Kouaoua (평균 24.90%) 순이며, Mg를 치환하는 Ni 백분율은 43.5~85.0%이다. 암갈색 가니어라이트 광석은 세포상이나 boxwork 조직을 가지며, 주 니켈 광석광물은 리자다이트~니켈 리자다이트 계열 광물에 일부 니켈 함유 활석~윌렘사이트 계열 광물로 구성된다. 리자다이트~니켈 리자다이트 계열 광물 내 NiO의 함량은 1.14~4.06 wt. %이며, Ni/(Mg+Ni) 백분율은 1.7~6.8%인데, 니켈의 함량이 낮은 이유는 팔면체 자리에서 Mg를 치환하는 Fe의 함량이 많은 것에 기인한다.

Mineralogical characteristics of garnierite ores from the Nakety, Kouaoua, and Ouaco Ni laterite deposits in New Caledonia are investigated using optical microscopy, powder X-ray diffractometer, and electron proble microanalyzer. Green garnierite ores have colloform, cellular, and boxwork texture, which are formed by precipitation under low temperature surface environment. They are mainly composed of Ni-bearing talc~willemseite series mineral and partly of lizardite. In Ni-bearing talc~willemseite series mineral, NiO contents are Ouaco (average 40.63%), Nakety (average 28.58%), and Kouaoua (average 24.90%), in descending order. Ni atomic percentage replacing Mg in octahedral site are 43.5~85.0%. Dark brown garnierite ores show cellular or boxwork texture, and consist of lizardite~Ni lizardite with some Ni-bearing talc~willemseite series mineral. Ni contents in lizardite~Ni lizardite are 1.14~4.06 wt. % and Ni atomic percentage replacing Mg in octahedral site 1.7~6.8%. Low NiO content in dark brown garnierite attributes to high Fe content replacing Mg in octahedral site.

키워드

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피인용 문헌

  1. Occurrence of Nickel in Bauxite Ore from Samar Island, Philippines vol.26, pp.4, 2013, https://doi.org/10.9727/jmsk.2013.26.4.313
  2. A Study on Classification of Limonite and Saprolite from Nickel Laterite Ores vol.25, pp.1, 2016, https://doi.org/10.7844/kirr.2016.25.1.40