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Metamorphic evolution and geochronology of garnet amphibolite in Jeongok area in the Imjingang Belt, Korea: tectonic implications : 임진강대 전곡 석류석 각섬암의 변성학적 진화와 지질 연대학: 지체구조적 의미

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Authors

이정민

Advisor
정해명
Major
자연과학대학 지구환경과학부
Issue Date
2016-08
Publisher
서울대학교 대학원
Keywords
변성암석학지질연대학
Description
학위논문 (석사)-- 서울대학교 대학원 : 지구환경과학부, 2016. 8. 정해명.
Abstract
The Imjingang belt is located between the Gyeonggi massif and Nangrim massif, and has been considered as the Permo-Triassic collisional belt. This master degree thesis concentrates on the metamorphic evolution and geochronological approach of garnet amphibolite to understand the tectonic environment of the Imjingang belt. The garnet amphibolite mainly consists of amphibole + plagioclase + garnet + diopside + quartz + titanite + rutile. It emplaced at ca. 367 ± 3 Ma estimated by zircon U-Pb age dating technique. The early Devonian tectonic movement of Paleo-Qinling orogenic belt influenced mafic magmatism in the Injingang belt. After that, the Imjingang belt underwent regional metamorphism (588-803 °C and 5.9-12.2 kbar) corresponding to upper amphibolite facies at ca. 237 ± 9 Ma and 265 ± 15 Ma. These Permo-Triassic metamorphic events agree well with the regional metamorphism reported from other areas of the Imjingang belt and Gyeonggi Massif.
Language
English
URI
https://hdl.handle.net/10371/131429
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