文献类型：期刊文献

英文题名：NOBLE GASES FINGERPRINT THE SOURCE AND EVOLUTION OF ORE-FORMING FLUIDS OF CARLIN-TYPE GOLD DEPOSITS IN THE GOLDEN TRIANGLE, SOUTH CHINA

作者：Jin, Xiao-Ye Hofstra, Albert H. Hunt, Andrew G. Liu, Jian-Zhong Yang, Wu Li, Jian-Wei

第一作者：Jin, Xiao-Ye

通信作者：Li, JW[1];Li, JW[2]

机构：[1]China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China;[2]China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China;[3]Minist Nat Resources Peoples Republ China, Innovat Ctr Ore Resources Explorat Technol Reg Be, Guiyang 550018, Peoples R China;[4]US Geol Survey, POB 25046, Denver, CO 80225 USA;[5]Guizhou Bur Geol & Mineral Explorat & Dev, Guiyang 550018, Peoples R China;[6]Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550003, Peoples R China

第一机构：China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China

通信机构：corresponding author), China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China;corresponding author), China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China.

年份：2020

卷号：115

期号：2

起止页码：455-469

外文期刊名：ECONOMIC GEOLOGY

收录：;EI(收录号：20205109635274);Scopus(收录号：2-s2.0-85097613343);WOS:【SCI-EXPANDED(收录号:WOS:000519582100010)】；

基金：This work is supported by the Natural Science Foundation of China (grants 41802094, U1812402), the National Basic Research Program (grant 2014CB440906), the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (CUGCJ1711), and the National Demonstration Center for Experimental Mineral Exploration Education at China University of Geosciences (Wuhan). We are grateful to Chengfu Yang and Zepeng Wang from the 105 Geological Team of Guizhou Province, Ming Chen from Guizhou Zijin Mining Company, and Jiangfeng Zhang and Qingyuan Mao from Shengtun Mining Company for access to the mine and useful discussion during the fieldwork. We thank Profs. Larry Meinert and Adam Simon for editorial handling. The manuscript benefited greatly from reviews by Dr. Thomas Darrah and an anonymous reviewer, and proofreading by Drs. Michael Cosca and Natalie Latysh, which are gratefully appreciated. This is contribution 21 from the China University of Geosciences Center for Research in Economic Geology and Exploration Targeting (CREGET). Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. government.

语种：英文

外文关键词：Air - Calcite - Deposits - Fluorspar - Groundwater - Helium - Isotopes - Metamorphic rocks - Mineralogy - Mixtures - Pyrites - Sedimentology

摘要：Precise constraints on the source and evolution of ore-forming fluids of Carlin-type gold deposits in the Golden Triangle (south China) are of critical importance for a better understanding of the ore genesis and a refined genetic model for gold mineralization. However, constraints on the source of ore fluid components have long been a challenge due to the very fine grained nature of the ore and gangue minerals in the deposits. Here we present He, Ne, and Ar isotope data of fluid inclusion extracts from a variety of ore and gangue minerals (arsenian pyrite, realgar, quartz, calcite, and fluorite) representing the main and late ore stages of three well-characterized major gold deposits (Shuiyindong, Nibao, and Yata) to provide significant new insights into the source and evolution of ore-forming fluids of this important gold province. Measured He isotopes have R/R-A ratios ranging from 0.01 to 0.4 that suggest a maximum of 5% mantle helium with an R/R-A of 8. The Ne and Ar isotope compositions are broadly comparable to air-saturated water, with a few analyses indicating the presence of an external fluid containing nucleogenic Ar-38 and radiogenic Ar-40. Plotted on the Ne-20/He-4 vs. helium R/R-A and He-3/Ne-20 vs. He-4/Ne-20 diagrams, the results define two distinct arrays that emanate from a common sedimentary pore fluid or deeply sourced metamorphic fluid end-member containing crustal He. The main ore-stage fluids are interpreted as a mixture of magmatic fluid containing mantle He and sedimentary pore fluid or deeply sourced metamorphic fluid with predominantly crustal He, whereas the late ore-stage fluids are a mixture of sedimentary pore fluid or deeply sourced metamorphic fluid bearing crustal He and shallow meteoric groundwater containing atmospheric He. Results presented here, when combined with independent evidence, support a magmatic origin for the ore-forming fluids. The ascending magmatic fluid mixed with sedimentary pore fluid or deeply sourced metamorphic fluid in the ore stage and subsequently mixed with the meteoric groundwater in the late ore stage, eventually producing the Carlin-type gold deposits in the Golden Triangle.