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Metallogenic mechanism of gibbsite from accumulated bauxite in western Guangxi province(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2004年第02期
Page:
26-31
Research Field:
Publishing date:

Info

Title:
Metallogenic mechanism of gibbsite from accumulated bauxite in western Guangxi province
Author(s):
LIU Yun-hua 1; 3; MAO Xiao-dong 2; 3; HUANG Tong-xing 4
1.Institute ofGeosciences and Resources, China University ofGeosciences(Beijing), Beijing 100083, China; 2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059,China;3. Yichang Institute ofGeology and Mineral Resources, CGS,
Keywords:
accumulated bauxite ; gibbsite ; metallogenic mechanism ; hydrolytic dissociation ; western Guangxi
PACS:
P611.2
DOI:
-
Abstract:
The mineral assemblage, spatial features of minerals distribution, characters of occurrence, generations of minerals form- ing, chemical compositions, rare earth elements and water contents inside or surrounding ore-body have been securely researched. The results indicate that the gibbsite from accumulated bauxite(Salento-type)in western Guangxi province was formed through hydratation of diaspore. The formation of gibbsite was strictly controlled by the concentrations of Al3+、[SiO4] 4-and pHin of un- derground water. It experienced several periods as precipitation, solidification, devitrification and crystallization of Al(OH)3. In early period kaolinite was formed by means of leaching and secondary quartz was formed in lightly leached position. This kind of bauxite is considered to be not only a new deposit type, and its particular genesis to be shown as a degeneration bauxite deposit as well.

References:

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Memo

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Last Update: 2004-06-20