居昌지역에 분포하는 중생대 화성암류에 대한 연령과 주성분 광물의 화학조성

• 영문명: K-Ar Ages and Major Mineral Compositions of the Mesozoic Igneous Rocks in the Vicinity of the Geochang Area
• 발행기관: 대한자원환경지질학회
• 저자명: Young Jun Kim(金勇俊) Deung Lyong Cho(趙騰龍) Young Surk Park(朴永錫)
• 간행물 정보: 『자원환경지질』22권 2호, 117~128쪽, 전체 12쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1989.04.30

영문 초록

Devonian Geochang foliated granite and Jurassic plutonic rocks intrude Precambrian metamorphic Complex at Geochang area, southern part of the Korean Peninsular. Among them hornblendes from four Jurassic plutonic bodies which have had no trace of metamorphism or deformation since their intrusion were dated by K-Ar method. Hornblende gabbro dike which intruded Anorthosite of unknown age revealed 204±10Ma, and hornblende granite and hornblende-biotite granodiorite were 178±9Ma and 181±9Ma, repectively. Also, hornblende diorite which partly showing primary foliations were 178±9Ma, so igneous activity of Geochang area, northern part of Jirisan, were active about 180 Ma before. Microprobe data of dated hornblends and other major constituent minerals such as plagioclases and biotites were also reported, and their chemical composition showed systematic changes in terms of lithologic types.

목차

Abstract

서론

일반지질

각섬석반려암

각섬석섬록암

居昌 각섬석화강암

각섬석-흑운모화강섬록암

중생대 화강암류에 대한 지질시대

결론

참고문헌