The Hongshan copper-polymetallic deposit is located in Zhongdian district, northwestern Yunnan province, China. The main body of the deposit was a garnet-rich skarn type deposit. We discovered a hot-spring exhalative formation which overprinted on the skarn type deposit. The hot-spring exhalative formation had a well preserved spout with typical hot spring exhalative characteristics. The sulfur isotope compositions of the sulfides from the quartz vein in the exhalative spout varied from 3.73‰ to 5.57‰,with an average value being 5.08‰. The ratios of 206Pb/204Pb varied from 18.670 to 18.808, 207Pb/204Pb from 15.614 to 15.784, respectively. The sulfur and lead isotopic compositions were similar to that of the Himalayan porphyries and porphyry-type deposits in western Yunnan, which comprehened the Cenozoic magmatic activity and mineralization occurring in Hongshan area. The discovery of hot-spring exhalative mineralization not only deepened the understandings of mineralization processes in Zhongdian area and metallogenesis of Hongshan copper-polymetallic deposit, but also supported an important inspiration for expanding the exploration prospect area in northwestern Yunnan.
Song Baochang,Cai Xinping,Xu Xingwang et al. CENOZOIC HOT-SPRING EXHALATIVE MINERALIZATION IN HONGSHAN COPPER-POLYMETALLIC DEPOSIT IN ZHONGDIAN, NW YUNNAN[J]. Chinese Journal of Geology, 2006, (4): 700-710,719.