Metallogenic Model of Bauxite in Central Guizhou Province:an Example of Lindai Deposit  

作　　者：LING Kunyue ZHU Xiaoqing WANG Zhonggang HAN Tao TANG Haoshu CHEN Wenyi 

机构地区：[1]Institute of Geochemistry,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Institute of Geology,Guizhou Bureau of Geology and Minerals

出　　处：《Acta Geologica Sinica(English Edition)》2013年第6期1630-1642,共13页地质学报（英文版）

基　　金：granted by the fund of State Key Laboratory of Ore Deposit Geochemistry (SKLODG-ZY125-01);the Major Project of Chinese National Programs for Fundamental Research and Development (973 Program)(No. 2014CB440906 and 2012CB416602)

摘　　要：The bauxites in central Guizhou are hosted by the Lower Carboniferous Jiujialu Formation.Geochemistrial characteristics of the Lindai bauxite deposit indicate that the underlying Shilengshui Formation dolomite is the precursor rock of mineral resources.Weathering simulation experiments show that Si is most likely to migrate with groundwater,the migration rate of which is several magnitude higher than Al and Fe under nature conditions （pH=3-9）.The neutral and acid nonreducing condition is the most conducive to the Al rich and Si removal,while the acid reducing conditions is the most conducive to the Al rich and Fe removal.In the process of bauxite formation,coal beds overlying the Al-bearing rock series or other rock formation rich in organic materials can produce acid reducing groundwater,which are important for the bauxite formation.Finally,propose the metallogenic model of the bauxite in central Guizhou Province and put forward three new words which are ＂original bauxite material＂,＂bauxite material＂ and ＂original bauxite＂.The bauxites in central Guizhou are hosted by the Lower Carboniferous Jiujialu Formation.Geochemistrial characteristics of the Lindai bauxite deposit indicate that the underlying Shilengshui Formation dolomite is the precursor rock of mineral resources.Weathering simulation experiments show that Si is most likely to migrate with groundwater,the migration rate of which is several magnitude higher than Al and Fe under nature conditions （pH=3-9）.The neutral and acid nonreducing condition is the most conducive to the Al rich and Si removal,while the acid reducing conditions is the most conducive to the Al rich and Fe removal.In the process of bauxite formation,coal beds overlying the Al-bearing rock series or other rock formation rich in organic materials can produce acid reducing groundwater,which are important for the bauxite formation.Finally,propose the metallogenic model of the bauxite in central Guizhou Province and put forward three new words which are ＂original bauxite material＂,＂bauxite material＂ and ＂original bauxite＂.

关 键 词：BAUXITE GROUNDWATER geochemistrial characteristics weathering simulation experiments Central Guizhou Province 

分 类 号：P618.45[天文地球—矿床学]