자원환경지질 (Economic and Environmental Geology)
- 제31권5호
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- Pages.447-458
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- 1998
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
제주도 동부 알칼리 현무암내 스피넬-레졸라이트 포획체의 연구
A Study on the Spinel-Lherzolite Xenolith in the Alkali Basalt from Eastern Cheju Island, Korea
- Yun, Sung Hyo (Department of Earth Sciences, Pusan National University) ;
- Koh, Jeong Seon (Department of Earth Sciences, Pusan National University) ;
- Anh, Ji Young (Department of Earth Sciences, Pusan National University)
- 투고 : 1998.06.12
- 심사 : 1998.08.07
- 발행 : 1998.10.31
초록
The spinel Ihelzolite of ultramafic xenoliths are found in the alkali basalt from eastern part of the Cheju island, Korea. The xenolith is are mainly composed of olivine, orthopyroxene, clinopyroxene and spinel. Based on the chemical compositions of the constituent minerals, the ultramafic xenolith belong to upper mantle peridotite. Each minerals have a protogranular texture. Olivine with kink band texture partly shows undulatory extinction. Some clinopyroxenes have spongy textured rims. Brown spinels occur in the interstices between olivine and pyroxene grains. Olivine is mostly forsterite
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