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《Conributions To Geology and Mineral Resources Research》 2002-02
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ADVANCE ON THE RELATION OF ORDERS OF KAOLINITE CRYSTALLIZATION IN COAL SERIES TO THE ORIGIN

LIU Chang-ling 1,LIU Qin-fu 2 (1.Tianjin Geological Research Institute, Tianjin 300061, China; 2.China University of Mining and Technology, Beijing 100083, China)  
The order of kaolinite repersents its origin. A new discovery and understanding about the relationship of kaolinite order and its origin are obtained from the detail study of kaolinite in coal measures. Disorder kaolinite is generally formed under the conditions of normal temperature and pressure and will be preserved as disorder because of substitution of Fe or Ti ion for Al ion in octahedron and dislocation of neighouring crystal layers for long period under the stable geological conditions However, the disorder kaolinite is generally turned to the ordered under geotherm, high temperature water and water-rock reactions. In the past, the experts in our country thought that very well order kaolinite is related to the shallow hydrothermal alteration of shallow dyke and extrusive rocks. But our studies in this paper show that very well order kaolinite in the purple partings (soft kaolin clay) of coal is formed by superimposition of ascended hydrothermal fluid related to regional magmatism on geotherm in intergrain space.
【Fund】: 国家自然科学基金项目 (批准号 :4980 2 0 10 );; 教育部高等学校优秀青年教师教学科研奖励基金联合资助
【CateGory Index】: P578
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