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《Geology of Shaanxi》 1990-02
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DISCUSSION ON THE METALLOGENETIC CONDITIONS,MECHANISM AND THE MODEL OF THE DONGGOUBA Au-Ag POLYMETALLIC DEPOSIT IN SHAANXI PROVINCE

Qiu Zhuguo (Chengdu College of Geology )Tao Xisen (The Geological Team No.2,Shaanxi Bureau of Geology and Mineral Resources)  
On the basis of studies of the geological features of the Donggouba poly- metallic deposit,the measured results of the stable isotopes of sulfur, hydrogen,oxygen and carbon,the fugacity data from sulfur,hydrogen, oxygen and carbon dioxide,the inclusion thermometry,the natural-heat luminosity and the coefficients of pyroelectrcity,the writers analyzed the geochemical conditions and the environments for metallization,calculated the model age of lead isotope in a single phase (858—1042 Ma,correspon- ding to the Qingbaikou Period),divided the metallogenetic phases,set up the metallogenetic model and showed the indication and direction of ores in this area. In the view of the previous studies,it is reasonable to assume a volc- ano-sedimentary-metamorphosed origin for the metallization of the Donggouba polymetallic deposit.
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