하동지역 하상퇴적물의 지화학적 특성에 대한 연구

Abstract

The purpose of this study is to get geochemical characteristic of major, minor and rare Earth elements in Hadong area so we can estimate the environmental contamination and understand geochemical disaster. Stream sediments samples are having no possibility of contaimination effect and representing drainage basins composed of uniform geology. Stream sediments is reservoir for heavy metallic elements as a heterogeneous complex of several different particles. Also stream sediments is well reflected the natural environment. So we use stream sediments in this study. The samples are got over 100g by wet sieving under 100mesh(??150??m) along the stream system and dried slowly in the laboratory and rub in to under 200mesh using the alumina mortar and through the XRF, ICP-AES, NAA analysis we earn contents of major elements, minor elements and rare earth elements for geochemical natural background. 1. Contents of major elements. SiO2 contents is 41.6?`57.8wt.%, Al2O3 contents is 14.8?`19.8wt.%, Fe2O3 is 5.84?`10.8wt.%, K2O contents is 1.60?`3.79wt.%, MgO contents is 1.27?`3.84wt.%, Na2O contents is 0.37?`2.14wt.%, CaO contents is 0.63?`5.37wt.%, TiO2 contents is 0.74?`2.02wt.%, P2O5 contents is 0.14?`0.63wt.% MnO contents is 0.07?`0.16wt.%. 2. Contents of minor and rare earth elements. Cu contents is 64.7?`133ppm, Pb contents is 26.5?`37.5ppm, Sr is 95.0?`675ppm, V contents is 1.60?`3.79wt.%, Zr contents is 51.0?`135ppm, Li contents is 27.3?`90.0ppm, Co contents is 15.7?`29.5ppm, Cr contents is 79.6?`153ppm, Hf contents is 6.66?`29.7ppm, Sc contents is 13.4?`27.1ppm, Ce contents is 102?`360ppm, Th contents is10.6?`82.4ppm