영남지역 고령토-납석 광상의 성인 연구

• 영문명: Genesis of kaolin-pyrophyllite deposits in the Youngnam area
• 발행기관: 대한자원환경지질학회
• 저자명: 상기남(Ki Nam Sang)
• 간행물 정보: 『자원환경지질』25권 2호, 101~114쪽, 전체 14쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1992.04.30

영문 초록

Occurrences of many kaolin-pyrophyllite deposits in the Youngnam area is related to the Late Cretaceous volcanic rocks, which are widely distributed through southern part from Tongnae-Yangsan to Miryang-Wolsung. The mode of occurrence and genesis of the kaolin-pyrophyllite deposits related to the volcanism was studied. This area is covered by andesitic rocks, rhyolite and rhyolitic welded tuff in ascending order. Lower most andesitic part is almost fresh. The altered rocks in the rhyolitic welded tuff can be classified into the following zones: silicified, pyrophyllite-kaolin, and argillic zone from the center part of ore deposit. The clay deposits occur as irregular massive, layer and funnel type about 5~20 m in width and is accompanied by thin diaspore bed outside of ore shoot. The clays chiefly consist of kaolinite, sericite, pyrophyllite, a little amount of diaspore, alunite, dumortierite, corundum and pyrite. The process of kaolinization-pyrophyllitization has a close relation to a local acidic hydrothermal solution originated from granitic rocks. Acidic hydothermal alteration occurrs mainly in the rhyolitic welded tuff. Initial solution containing H₂S and others was oxidized near the surface and formed hydrothermal sulfuric acid solution.

목차

ABSTRACT

서언

지질개요

고령토-납석광상

광석광물

광상 형성 과정

결론

참고문헌