Genesis of the Yushan Concealed Bauxite Deposit in Xin’ an County, Henan Province

详细信息   

• 责任者：Li Zhongming (Key Laboratory for Geological Process Mineralizing and Resource Utilization in Metal-Mineral ; Institute of Geological Survey of Henan Province ; Zhengzhou 450007 ; China) ; Yan Changhai
• 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.421-429
• 图表：4 illus., 37 refs.
• 分类号：1001,1002
• issnNo：ISSN0495-5331
• isbnNo：CN11-2043/P

摘要

This paper analyzed the metallogenic epoch, ore-forming material source, metallogenic enviromnent, and ore-controlling factors of the Yushan bauxite ore deposit in Xin＇ an County, Henan Province. It is suggested that the Yushan bauxite ore deposit formed in the early Permian. Its ore -forming material sources are weathered products, which mainly came from aluminum silicate rocks of the paleouplift, and a small mount were derived from the underlying Middle Ordovician Majiagou Group carbonate rocks in western Henan Province.  The three periods are ore body emplacement, burial, transformation and preservation ; the five stages are material source preparation, transportation, syngenesis, dlagenesis, deuterogenic stage, weathering and epigenesis. A metallogenic model of bauxite （clay） deposits as ＂paleouplift weathered ＋ clastic and chemical deposits＂ is put forward.  Its principal metallogenic mechanism is mechanical and chemical differentiation.