Journal
ACTA GEOLOGICA SINICA-ENGLISH EDITION
Volume 87, Issue 6, Pages 1630-1642Publisher
WILEY-BLACKWELL
DOI: 10.1111/1755-6724.12164
Keywords
bauxite; groundwater; geochemistrial characteristics; weathering simulation experiments; Central Guizhou Province
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Funding
- fund of State Key Laboratory of Ore Deposit Geochemistry [SKLODG-ZY125-01]
- Major Project of Chinese National Programs for Fundamental Research and Development (973 Program) [2014CB440906, 2012CB416602]
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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 non-reducing 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.
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