질석화가 진행된 풍화단면에서의 광물조성과 주원소의 변화

• 영문명: Mineralogical and chemical variation in weathering profile on ultramafic rocks during vermiculitization
• 발행기관: 대한자원환경지질학회
• 저자명: 문희수(Hi Soo Moon) 송윤구(Yungoo Song) 신상은(Sang Eun Sin)
• 간행물 정보: 『자원환경지질』26권 1호, 29~40쪽, 전체 12쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1993.02.28

영문 초록

Several vermiculite deposits occur as the alteration product from phlogopite in ultramafic rock, in the Hongseong and Cheongyang area, South Korea. Some quaries 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 H₂O, and decrease of K as depth of profile decrease reflecting the characteristics in vermiculitization. Also, there was a tendency that weathering indicies of each sample horizon change gradually with increasing depth. This tendency can be explained as variations of degree of vermiculitization. The regular changes of mineralogical and chemical composition in vertical profile suggest that weathering is the most important process in vermiculitization in this area.

목차

ABSTRACT

서론

시료 및 연구방법

일반지질

질석의 산출상태

풍화단면 구성광물

변질대의 주원소 거동과 풍화지수의 변화

결론

참고문헌