嶺南陸塊에 分布하는 古期花崗岩質岩의 地質年代와 成因에 對한 硏究

• 영문명: Geochronology and petrogenesis on the older granitic rocks collected across the Ryeongnam massif, Korea
• 발행기관: 대한자원환경지질학회
• 저자명: Yong Jun Kim(金勇俊)
• 간행물 정보: 『자원환경지질』19권 5호, 151~162쪽, 전체 12쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1986.10.30

영문 초록

The older granitic rocks of the study area are composed of mainly orthogneiss and foliated granite. These rocks shows mostly mortar or flaser structure by strong mylonitization and thermal metamorphism during several orogenies. ⁴⁰Ar-³⁹Ar incremental-release ages of these rocks have been determined for 6 hornblende, 7 muscovite and 4 biotite concentrates separated from rocks collected across the Ryeongnam massif. Most ⁴⁰Ar-³⁹Ar age are discordant with Rb-Sr whole rock age of the same area. These ages range from 1998 to 172Ma. This discordant age is interpreted to indicate that samples were in contact with Daebo granite body that was characterized by large and variable ⁴⁰Ar-³⁹Ar ratios. Such ratios most likely resulted from widespread diffusion of the argon liberated from older granitic rocks during several metamorphic overprint. The general trend of the chemical composition of these rocks suggest that most of them are some series of differentiated products by fractional crystallization.

목차

Abstract

序言

一般地質

地質時代

岩石地化學的考察

結論

參考文獻