Economic and Environmental Geology (자원환경지질)
- Volume 29 Issue 4
- /
- Pages.529-541
- /
- 1996
- /
- 1225-7281(pISSN)
- /
- 2288-7962(eISSN)
Petrogenesis of the so-called Masanite in the Kyeongsang Sedimentary Basin
경상퇴적분지내에 분포하는 소위 마산암에 대한 암석성인연구
- Kim, Kyu Han (Dept. of Science Education, Ewha Womans University) ;
- Lee, Hwa Jung (Dept. of Science Education, Ewha Womans University)
- Received : 1996.05.27
- Published : 1996.08.30
Abstract
The granitic rocks, so called Masanite, characterized by the micrographic, mylmekitic and perthitic textures, and zonal structure of the plagioclase in the Masan, Changwon and Jinhae areas belong to normal granite and granodiorite based on the modal analysis. These petrographic features strongly suggest the shallow emplacement of the plutons which are defined a typical calc-alkaline suite and I-type granitoids. The pressures of emplacement of the granitic plutons using the amphibole geobarometer were calculated to be 1.2kbar in the Masan area and 1.4kbar in the Changwon area. Their amphibole-plagioclase equilibrium temperatures were obtained to be
Keywords