The Bentonite Ore Geochemistry Barkol Characteristics And Mineralogical Studies

Bentonite mineral research in recent years has been a lot of results come out, butknow very little previous geochemical characteristics of mine formed, thegeochemical between the original rock geochemistry characteristics andmineralization role of relationship do not know enough about the geochemicalcharacteristics of system, failed to build up deposits formed. This paper on the majorand trace element and REE geochemical characteristics of mineralization protolith,montmorillonite content and mineralogical studies, combined with the geologicalcharacteristics of the deposit, the ore fabric, the mineral paragenesis relations and orephysical and chemical properties, to a new the perspective to understand thegeochemical process of the deposit. In study, the formation of the deposits of theUpper Carboniferous to Lower Permian Haerjiawu Group andesitic volcanic rocks areclosely related rocks are in mafic calc-alkaline series, has the characteristics of highthe Al₂O₃, rich Na₂O its formation tectonic setting with signs of the transition to themainland from the island arc subduction environment. Late Carboniferous-EarlyPermian volcanic activity is extremely strong, magmatic eruption with multi-stage,multi-phase characteristics of the formation of a large number of andesitic volcaniclava and volcanic clastic, after experiencing large tectonic movement, regional bymarginal basin gradually evolved into overall was negative inland basins. Volcanicmaterial is stable sedimentary basin before covering andesitic volcanic rocks. Withthe intensification of magmatic activity, the erupted magma influenced by theexternal environment, the atmospheric, oceanic and biological decomposition of CO₂and sediment carbonate, sulfate, calcium and magnesium salts interaction that issimilar CaCO₃+H₂O+CO₂â†'Ca²⁺+2[HCO₃]-the chemical reaction, therebymaintaining the-weakly alkaline aqueous medium. Hydrolysis rock in an alkalineenvironment, Al₂O₃and Na₂O huge loss not due to weathering, resulting rock in a more stable environment, full time devitrification, hydration and recrystallization Allarge number of replacement protolith minerals The Si and completedmontmorillonitization.