Economic and Environmental Geology (자원환경지질)
- Volume 27 Issue 4
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- Pages.335-343
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- 1994
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
A Study on the Genesis of Eonyang Amethyst Deposits
언양(彦陽) 자수정 광상(鑛床)의 성인(成因)에 관한 연구(硏究)
- Youn, Seok-Tai (Dept. of Earth Science Education, Chonnam National Univ.) ;
- Park, Hee-In (Dept. of Geological Science, Seoul National Univ.)
- Received : 1994.07.14
- Published : 1994.08.30
Abstract
The Eonyang amethyst deposits are composed of vug quartz emplaced in the Eonyang granites of Mesozoic Cretaceous age. The Eonyang granites are composed of biotite granite, porphyritic biotite granite, aplite and miarolitic granite. The petrochemical data of the Eonyang granites show the trend of subalkaline magma, calc-alkaline magma, I-type granitoid and magnetite series. The vug quartz show the characteristic growth zoning (white quartz-smoky quartz-amethyst) from wall side. Generally fluid inclusions in the vug quartz can be divided into four main types based on compositions (I-type: gas inclusion, II-type: liquid inclusion, III-type: polyphase inclusion, IV-type: liquid
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