忠南 禮山地區 滑石鑛床의 成因에 關한 硏究

• 영문명: Genesis of talc ore deposits in the Yesan area of Chungnam, Korea
• 발행기관: 대한자원환경지질학회
• 저자명: 우영균(Young Kyun Woo) 최석원(Suck Won Choi) 박기화(Ki Hwa Park)
• 간행물 정보: 『자원환경지질』24권 4호, 363~378쪽, 전체 16쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1991.08.30

영문 초록

Field and microscopic evidence, XRD, EPMA and chemical data suggest that parent rock of talc ore deposits of Yesan district was originated from ultramafic igneous rock. Parent rock can be divided into serpentinized dunite, serpentinized peridotite, metagabbro, amphibolite and hornblende schist. The ore deposits are highly sheared, and show many evidences of hydrothermal alteration and metamorphism at the greenschist and albite-epidote amphibolite facies. The process of steatitization is variable depending upon the composition, and the degree of alteration and metamorphism of the parent rocks. Steatitization can be divided into two processes with or without serpentinization. The parent rocks with serpentinization are serpentinized dunite, serpentinized peridotite and metagabbro, showing the following alteration process; olivine→serpentine→talc. The rocks without serpentinization are amphibolite and hornblende schist showing the following sequence; hornblende→chlorite→talc. Formation of talc deposits is summarized as following six stages; 1) Intrusion of ultramafic rocks, 2) autometamorphism, 3) metamorphism at greenschist and albite-epidote-amphibolite facies, 4) brittle deformation, 5) hydrothermal alteration, 6) purification of low-grade talc by late dyke intrusion.

목차

ABSTRACT

序言

鑛床附近의 地質槪要및 地質構造

滑石鑛床과 母岩의 産出狀態

母岩, 鑛石鑛物 및 滑石化過程

酸素 및 水素 同位元素比 分析 結果 및 解析

滑石鑛床의 成因

參考文獻