沃川帶의 地質 및 鑛物資源에 關한 硏究

• 영문명: Petrologic study on the basement and the lower part of Ogcheon zone and igneous intrusives in the Pyeongchang-Jecheon area
• 발행기관: 대한자원환경지질학회
• 저자명: Dai Sung Lee(李大聲) Ki Chang Na(羅基昌) Yong Joon Kim(金勇俊)
• 간행물 정보: 『자원환경지질』18권 4호, 381~397쪽, 전체 17쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1985.08.30

영문 초록

A petrological study has been done in the Pyeongchang-Jaecheon area which is a northwestern part of the basement of Ogcheon zone for the purpose of comparison of the area to the Nogjeon-Yeongchun area which is the antipodal basement of the zone in the petrological and geotectonical view points. The major units of the area are Precambrian granitic gneissic complex, banded gneiss, lineated leucocratic gneiss and pegmatitic leucogranitic gneiss in the west, elongated exposure of quartz schist (or partly quartzite) and phyllite, named as Jungdaegal-bong Group correlated to the lower sequence of Joseon Group, in the middle, and limestone and calcic dolomite, Iptanri Formation, correlated to the middle of Joseon Group in the east. Igneous plutons are distributed in the areas of gneissic complex and limestone formation as well as in the Eosangcheon and Daedaeri areas in the southeastern out of the area. Present study reveals that the gneissic complex are the products of granitization to metamorphism of amphibolite facies in the order of above mentioned from the metasediments of schists and calcareous rocks. A notable characteristics of the phyllite of Jungdaegal-bong Group is the presence of syntectonically segregated quartz rods in the forms of lens, swirl or boudinage in evenly distributed in the phyllitic to chloritic matrix. Igneous rocks range in composition from gabbro through diorite, granodiorite, to schistosed and porphyritic granites in stock and dike. The orogenic movement of the Ogcheon zone initiated in the middle Proterozoic time, pre-sedimentation of Ogcheon Group and superposed the granitization in Permian, Jurassic Daebo orogeny with granitic batholiths and stocks, and Cretaceous plutonic intrusion.

목차

Abstract

序言

地質槪要

地質各論

變成相과 變成作用

地質構造

討論

結論

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