울산-언양 지역 화강암체 주변의 퇴적암류에 대한 접촉변성작용에 관한 연구

• 영문명: Contact metamorphism from the aureoles of the granitic rocks, Ulsan-Eonyang region
• 발행기관: 대한자원환경지질학회
• 저자명: 이상원(Sang Won Lee) 이준동(Joon Dong Lee) 김정진(Jeong Jin Kim)
• 간행물 정보: 『자원환경지질』25권 4호, 463~477쪽, 전체 15쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1992.08.30

영문 초록

The study area consists of sedimentary and volcanic rocks of Gyeongsang Supergroup, granitoid intrusives, and hornfelses around the granitoids. Granitoid intrusives occur in small stocks in Nijeon-ri, Uggog-ri, and Yul-ri area. The masses in Nijeon-ri and Uggog-ri are hornblende-biotite granodiorite, biotite granodiorite respectively, and Yul-ri mass is biotite granite. Surrounding sediments of these masses were thermally metamorphosed and contact aureoles were formed. The studied granitoids are considered to be formed by sequential crystallization-differentiation from calc-alkalic granitoid magma. Metamorphic minerals occurring in contact aureole are chlorite, actinolite, epidote, and biotite. Diopside and hornblende are observed in small amount in some lithology around contact aureole. The lithology of contact aureole is predominantly silty and sandy, and characteristic metamorphic minerals were poorly developed because of low temperature metamorphism. Low temperature in contact aureole could be deduced from the facts that the intrusions were small size, shallow depth, low temperature, and rare movement of volatiles from magma.

목차

ABSTRACT

서언

일반지질

화강암질암

화강암질암의 화학조성

접촉변성암

접촉변성암의 화학조성

변성광물

변성분대

변성작용의 고찰

결론

참고문헌