Economic and Environmental Geology (자원환경지질)
- Volume 26 Issue 1
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- Pages.29-40
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- 1993
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
Mineralogical and Chemical Variation in Weathering Profile on Ultramafic Rocks During Vermiculitization
질석화가 진행된 풍화단면에서의 광물조성과 주원소의 변화
- Moon, Hi-Soo (Dept. of Geology, Yonsei University) ;
- Song, Yungoo (Dept. of Geology, Yonsei University) ;
- Sin, Sang Eun (Dept. of Geology, Chonnam National University)
- Received : 1992.11.10
- Published : 1993.02.28
Abstract
Several vermiculite deposits occur as the alteration product from phlogopite in ultramafic rock, in the Hongseong and Cheongyang area, South Korea. Some quarries show well-defined weathering profile. Samples collected from those quarries were examined by XRD and chemistry to define a vertical variations in mineralogy and chemistry of the weathering profile developed on ultramafic rocks. The analysis by X-ray diffractometry showed that mineral compositions changed continuously as depth of profile increasing, the vermiculite-the phlogopite/vermiculite interstratified-the phlogopite. Chemical analysis of bulk samples in altered zone revealed that regardless of composition and kinds of mineral in the rock, there are significant increase of MgO, CaO and
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