Mineral Genesis and Evolutionary Sequence of the Bauxite Deposits in Henan Province

详细信息   

• 责任者：Liu Xuefei (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Belting 100083 ; China) ; Wang Qingfei
• 刊名：Geology and Prospecting
• 出版年：2012
• 卷期：48(3)
• 关键词：铝土矿 ; bauxite deposit ; 河南 ; Henan Province
• 页码：p.449-459
• 图表：5 illus., 71 tables, 5 refs.
• 分类号：1001,1002
• issnNo：ISSN0495-5331
• isbnNo：CN11-2043/P

摘要

The bauxite deposits in western Henan are the typical ones representative of karstie bauxite deposits in China. Some typical bauxite deposits in western Henan were chosen to conduct researches of mineral composition, occurrence, genesis and evolutionary sequence through analyses using XRD, SEM-EDS, EPMA and DTA techniques. The results show that the major minerals in the bauxite deposit in western Henan include diaspore, illite, anatase, kaolinite, goethite, hematite and futile. Diaspore is of a simple diagenetic genesis. Illite was mainly transformed from mica during the weathering process, and a few are silica replacement products. Most of the kaolinites were formed during the weathering process ; a few of them were formed by silica replacement.