Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
권호 표지

Interlayered Structures of Talc and Chlorite in the Talc Deposits of the Yugu Area, Korea

충남 유구지역 활석광상에서 관찰되는 활석과 녹니석의 혼합층상 특성

  • 김건영 (한국원자력연구소 방사성폐기물처분연구부) ;
  • 김수진 (서울대학교 지구환경과학부) ;
  • 고용권 (한국원자력연구소 방사성폐기물처분연구부) ;
  • 배대석 (한국원자력연구소 방사성폐기물처분연구부)
  • Published : 2005.09.01
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Abstract

Interlayered structures of talc and chlorite in the talc deposits of the Yugu area are studied using transmission electron microscope. Packets of chlorite-like layer in talcs or packets of talc-like layer in chlorites are commonly observed. Randomly interlayered features of talc and chlorite are locally observed in some specimens. Reactions observed in the present study include the addition or removal of a brucite-like layer in the interlayer region of the talc or chlorite resulting in the , transformation between a talc and a chlorite layers and breakdown or formation of a talc-like layer resulting in transformation between two talc layer and one chlorite layer. Both reactions are accompanied by a significant change in volume. In addition to these mechanisms, there are two volume conserving mechanisms; the combination of both mechanisms and mutual transformation in a complex manner. Reactions from 2 chlorite layers to 3 talc layers, from 2 chlorite layers + 1 talc layers to 1 chlorite layers + 3 talc layers, and from 3 chlorite layers to 5 talc layers are observed among the complex type mechanisms.

충남 유구지역 활석광상의 활석광석에서 관찰되는 활석과 녹니석의 혼합층상특성을 투과전자 현미경을 이용하여 연구하였다. 일반적으로 활석 내에 녹니석의 패킷이 존재하거나 혹은 그 반대로 녹니석 내에 활석의 패킷이 존재하는 것을 쉽게 관찰할 수 있다. 일부 시료에서는 국지적으로 불규칙한 활석-녹니석 혼합층상을 보인다. 확인된 활석-녹리석의 반응관계는 활석 층내에서 브루사이트층이 첨가 또는 제거되어 1개의 활석층과 1개의 녹니석층의 반응으로 나타나는 경우와, 하나의 활석층이 손실되면서 브루사이트층을 제공하거나 브루사이트층이 활석화되어 2개의 활석층과 1개의 녹니석층의 반응관계로 나타나는 경우가 있다. 이들은 모두 상당한 부피 변화를 수반한다. 또한 부피변화가 최소화되는 반응으로서 앞의 두 경우가 서로 결합된 경우와 부피변화가 증가되거나 감소되는 반응이 복합적으로 일어나는 경우가 있다. 이 경우 2개의 녹니석층과 3개의 활석층, 두 개의 녹니석층 + 1개의 활석층과 1개의 녹니석층 + 3개의 활석층, 3개의 녹니석층과 5개의 활석층 등의 복합적인 반응관계가 관찰되었다.

Keywords

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