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Geology and isotopic composition of helium,neon,xenon and metallogenic age of the jinding and Baiyangping ore deposits,northwest Yunnan,China

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Science China Earth Sciences 2003年第8期46卷 789-800页

作者：薛春纪陈毓川王登红杨建民杨伟光曾荣 Open Laboratory of Mineralization and Dynamics Ministry of Land and ResourcesChina Department of Geology and Mineral Resources Chang'an University Chinese Academy of Geological Sciences Institute of Mineral Resources Chinese Academy of Geological Sciences Yunnan Geological Party 3 Open Laboratory of Mineralization and Dynamics Ministry of Land and ResourcesChina Department of Geology and Mineral ResourcesChang'an University

Both the jinding and Baiyangping ore deposits developed in the Lanping basin, which is a Mesozoic-Cenozoic terrestrial clastic sedimentary basin. Their occurrences can easily lead many people to compare them with the Pb-Zn deposit hosted in sedimentary rocks, such as Mississippian Valley-, Sedex- and sandstone-type Pb-Zn deposits. However, the Lanping basin developed in the settings of strong tectonic activity of the continental crust, which could cause an effective material exchange between the lower crust and the upper mantle. The orebodies are clearly tectonically controlled without syngenetic features, which probably represents a new type of the sedimentary rock-hosted Pb-Zn deposit. The isotopic compositions of noble gases in ore-forming fluids indicate that 2%32% of helium (3He/4He = 0.19 Ra1.97 Ra) is derived from the mantle, 50.1% of neon (20Ne/22Ne = 10.4510.83; 21Ne/22Ne = 0.03) from the mantle, and considerable amount of xenon (129Xe/130Xe = 5.846.86; 134Xe/130Xe = 2.262.71) from the mantle, which show that mantle fluids played an important role in the ore formation. The ore-forming age of 6760 Ma obtained by Re-Os and 40Ar-39Ar dating methods is later than the host rock, which is coeval with the Himalayan alkali magmatism of the mantle source and mantle-crust source. In this paper, the mineralization of the jinding and Baiyangping ore deposits is considered to be related to the mantle fluids which move upward with the magma or along the deep faults, and mix with the meteoritic brine in the crust to result in large-scale deposition.

关键词： geology of ore deposits, isotopes of helium, neon and xenon, ore-forming age, jinding and Baiyangping, Yunnan, China.

Helium and argon isotopic geochemistry of jinding superlarge Pb-Zn deposit

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Science China Earth Sciences 1998年第4期41卷 442-448页

作者：胡瑞忠 G.Turner P.G.Burnard 钟宏叶造军毕献武

The study results of He and Ar isotopes from fluid inclusions in pyrites formed during mineralization stage of jinding superlarge Pb-Zn deposit in west Yunnan, China are reported. The data show that the 40Ar/ 36Ar and 3He/ 4He ratios of fluid inclusions are respectively in the range of 301.7\385.7 and 0.03\0.06Ra, suggesting the ore-forming fluid is a kind of air saturated meteoric groundwater. On the basis of research on coupled relationships among He, Ar, S and Pb isotopes, the evolution history of ore-forming fluid of the deposit can be summarized as （i） air saturated meteogenic groundwater infiltrated down and was heated→ （ii） leached S, C and radiogenic He, Ar from the basinal strata → （iii） leached Pb and Zn from mantle-derived igneous rocks located in the bottom of the basin→ （iv） ore-forming fluid ascended and formed the deposit. Due to this process, the isotope signatures of crustal radiogenic He, atmospheric Ar （with partial radiogenic 40Ar）, crustal S and mantle-derived Pb remained in the ore-forming fluid.

关键词： jinding superlarge Pb-Zn deposit fluid inclusion ore-forming fluid He and Ar isotope air saturated meteoric water.

Relationship Between Organic Matters and Zn-Pb Mineralization in the Giant jinding Zn-Pb Deposit,SW China

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地学前缘 2009年第S1期16卷 163-163页

作者： Yongbao Gao,Chunji Xue,Jiangwei Zhang 1.Xi’an Center,China Geological Survey,Xi’an 710054,China. 2.State Key Laboratory of Geological Processes and Mineral Resources,Faculty of Earth Sciences and Resources, China University of Geosciences(Beijing),Beijing 100083,China

The jinding Zn-Pb deposit,Yunnan Province, southwestern China,represents the youngest,only continental sediment-hosted giant Zn-Pb deposit in the *** kinds of organic matters,such as the kerogen,light-and heavy-oil,hydrocarbon gas, bitumen of different occurrences and maturation,have been observed in recent underground and open pit ***-gas traces and oil-and methane-in-

关键词： organic matter former oil-gas reservoir hydrogen sulfide jinding Zn-Pb deposit SW China