沃川帶 北東邊에 分布하는 婦山混成片麻岩에 對한 岩石學的 硏究

• 영문명: Petrologic Study on the Busan Migmatitic Gneiss in the northeastern Margin of the Ogcheon Zone
• 발행기관: 대한자원환경지질학회
• 저자명: Ki Chang Na(羅基昌)
• 간행물 정보: 『자원환경지질』20권 4호, 235~246쪽, 전체 12쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1987.08.30

영문 초록

Busan migmatitic gneisses in the northeastern margin of the Ogcheon zone have been studied petrologically in order to clarify their origin. Petrochemical and mineralogical studies show that the gneisses are Precambrian basemental paragneisses and the rocks were migmatized more intensively than the Bagdalryeong gneisses which have been known to constitute the basemental gneisses of Ogcheon zone. K-Ar biotite isotopic ages are 150.79±3.37Ma in Busan migmatitic gneiss and 191±4.27Ma in Bagdalryeong gneisses. These ages seem to be isotopic homogenised ages. Progressive regional metamorphisms are predominent in the studied area showing greenschist facies, epidote amphibolite facies and amphibolite facies toward N-W direction.

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