Geochemical Characteristics and Mineral Genesis Analysisi of Saponite Deposit in Tuokexun,Xinjiang
Based on field observations and geochemiscal test,we found that the deposit has two kinds of ore:Magnesium-saponite and Hectorite.Rare element data indicate that biotite granite of Late Variscan with high Li being 56.70× 10-6,which intruded into carbonate formation of Middle Devonian,harzburgite and granite of Middle Variscan accompanied with metasomatic metamorphism,and the high Li is very benefit to the formation of hectorite eventually.Oxygen and carbon isotopes data show the low value (-2.6‰～1.9‰ of δ13 C,average value is-0.55‰)in mineralized carbonate,while the value of δ18OQ-SMOW varied from 4.9‰ to 19.2‰,Average value is 11.5‰.The mineralized harzburgite value is 15.80‰ of δ18O-SMOW showing the ore-forming fluid is the mixture of magmatic water and underground water obviously.They are strong proof of hydrothermal alteration type deposit.
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万方数据
维普
