聞慶南部一帶에 分布하는 白堊紀 花崗岩類의 微量元素 및 鑛物化學

• 영문명: Trace element and mineral chemistry of the cretaceous granites in the southern Mungyeong area
• 발행기관: 대한자원환경지질학회
• 저자명: Hyun Soo Yun(尹顯秀)
• 간행물 정보: 『자원환경지질』24권 4호, 379~391쪽, 전체 13쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1991.08.30

영문 초록

The studied Cretaceous granties are widely distributed at the southern Mungyeong area in the southwestern part of Ogcheon Fold Belt. From the mineralogical and geochemical compositions, it is suggested that they show the characteristics of I-type and magnetite-series and formed under the conditions of high oxygen fugacity. The mineral chemistry of plagioclase, alkali feldspar and biotite in the granites by EMPA, was revealed as albite to oligoclase, microcline to microcline perthite and orthoclase perthite, and annite compositions, respectively. The granites have the distribution patterns of enriched LREE and depleted HREE, and show Eu negative anomalies suggesting mainly due to the feldspar fractionation in the residual magma. The geochemical data of Eu, Eu/*Eu, Sm and Gd suggest that the granites of the area have more abundant alkali feldspar crystallization than plagioclase. From the geochemical characteristics of Sr/Ba, La/Sm vs. Ce/Yb and other trace element evidences, the granites were the late stage products of differentiation and fractionated from a homogeneous parental granitic magma.

목차

ABSTRACT

序言

地質槪要

白堊紀 花崗岩類의 鑛物化學

花崗岩類의 微量元素 地化學

結言

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