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《JOURNAL OF CHENGDU UNIVERSITY OF TECHNOLOGY》 1998-03
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ISOTOPIC GEOLOGICAL FEATURES OF THE DONGGOUBA MULTIMETAL DEPOSIT

Lu Wuchang, Zhang Ping, Yang Shaoquan (Chengdu University of Technology, China)  
Kinetics of isotopic exchange in ore bearing fluids of the Donggouba deposit is studied in dedail and the main conclusions are as follows: (1) The loss of CO 2 in ore forming fluids may be the primary cause of carbon isotopic variation for calcites. (2) The δ D H 2O variation is strongly controlled by the CH 4 contents and temperature in ore forming fluids. (3) The ore forming fluids were derived from metamorphic waters. The sulfur elements were derived from old seawaters aqueous sulfates and magmatic sulfur. (4) The δ 34 S ∑S (9.8‰) , f O 2 (10 -29.5 ~10 -31.5 ) and pH(6~7) of mineralization period are estimated from sulfur isotopic composition of coprecipitation sulfate sulfide minerals. The residemcetime of sulfur species in hydrothermal systems is evaluated using the kinetic equation of sulfur isotopic exchange.
【Fund】: 国家自然科学基金
【CateGory Index】: P618.402
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