노화납석광산에서 산출되는 명반석대에 대한 지구화학적 연구

• 영문명: A geochemical study on the alunite zone of the Nohwa pyrophyllite deposits
• 발행기관: 대한자원환경지질학회
• 저자명: 신상은(Sang Eun Shin) 박홍봉(Hong Bong Park)
• 간행물 정보: 『자원환경지질』25권 4호, 373~378쪽, 전체 6쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1992.08.30

영문 초록

Ores of the Nohwa Pyrophyllite Deposits are composed mainly of pyrophyllite, kaolinite (dickite), quartz, pyrite, alunite and diaspore, etc. Alunite ore zone is located in the middle-lower parts of the deposits. Alunite ore zone with thickness of 20~30 cm is divided into two parts according to alunite contents: reddish and white greyish zone in the upper and lower parts, respectively. And the reddish alunitic ore has higher contents Al₂O₃, K₂O, Na₂O and Ig. loss than the white greyish alunitic ore. Perhaps alunitization of the deposits occurred in the vicinity of paleo-ground water table. EPMA data shows that sodium replaces potassium considerably in alunite structures and that the hydrothermal solution probably contains considerable amounts of sodium.

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