文献类型：期刊文献

英文题名：MAGMATIC ORIGIN FOR SEDIMENT-HOSTED Au DEPOSITS, GUIZHOU PROVINCE, CHINA: IN SITU CHEMISTRY AND SULFUR ISOTOPE COMPOSITION OF PYRITES, SHUIYINDONG AND JINFENG DEPOSITS

作者：Xie, Zhuojun Xia, Yong Cline, Jean S. Pribil, Michael J. Koenig, Alan Tan, Qinping Wei, Dongtian Wang, Zepeng Yan, Jun

第一作者：Xie, Zhuojun

通信作者：Xia, Y[1]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China;[2]Univ Nevada, Las Vegas, NV 89154 USA;[3]US Geol Survey, Denver, CO 80225 USA;[4]Guilin Univ Technol, Guilin 541004, Peoples R China;[5]Guizhou Bur Geol & Mineral Explorat & Dev, Geol Team 105, Guiyang 550018, Guizhou, Peoples R China;[6]Guizhou Inst Technol, Guiyang 550002, Guizhou, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China.

年份：2018

卷号：113

期号：7

起止页码：1627-1652

外文期刊名：ECONOMIC GEOLOGY

收录：;EI(收录号：20184806152449);Scopus(收录号：2-s2.0-85057146535);WOS:【SCI-EXPANDED(收录号:WOS:000450629400010)】；

基金：We are grateful to Guizhou Zijin Mining Corporation and Eldorado Gold Corporation for access to the Shuiyindong and Jinfeng deposits, respectively. We would like to acknowledge and thank Minghua Ren and Michael Strange from the University of Nevada, Las Vegas, electron microprobe and imaging laboratory (EMiL) for assistance with SEM and EPMA imaging and analyses. Jianzhong Liu is thanked for discussions that contributed to this study. We also thank Prof. Steve Kesler and associate editor Dr. Shaun Barker for their critical and helpful comments, which improved the paper. This work was supported by grants from the National Science Foundation of China (41703046) and the Chinese Academy of Science (CAS) "Light of West China" Program to Zhuojun Xie, from the National Key R&D Program (2016YFC0600607) and 973 Program (2014CB440905) to Yong Xia, and from the National Science Foundation of China (41803046) to Qinping Tan. Any used trade, product, or firm names are for descriptive purposes only and do not imply endorsement by the U.S. government.

语种：英文

外文关键词：Ablation - Antimony compounds - Cobalt deposits - Deposits - Igneous rocks - Inductively coupled plasma - Inductively coupled plasma mass spectrometry - Iron - Isotopes - Laser ablation - Mass spectrometers - Mineralogy - Ore reduction - Pyrites - Sedimentology - Sediments - Sulfide minerals - Sulfur compounds

摘要：The southwest Guizhou Province, China, contains numerous sediment-hosted Au deposits with Au reserves greater than 700 tonnes. To date, the source of ore fluids that formed the Guizhou sediment-hosted Au deposits is controversial, hampering the formulation of genetic models. In this study, we selected the Shuiyindong and Jinfeng Au deposits, the largest strata-bound and fault-controlled deposits in Guizhou, respectively, for detailed research on pyrite chemistry and S isotope composition using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and laser ablation-multicollector-inductively coupled plasma-mass spectrometry ( LA- MC-ICP-MS), respectively. Petrography and pyrite chemistry studies distinguished five generations of pyrite. Among these, pre-ore pyrite 2 and ore pyrite are the most abundant types in the deposits. Pre-ore pyrite 2 is anhedral to euhedral and with similar to 2,639 ppm As and wider ranges of Cu, Sb, and Pb (18 parts per thousand), resulting in elevated delta S-34 values of ore-related sulfide minerals and especially late ore-stage sulfide minerals. Although few igneous rocks are exposed in the mining area around these deposits, there is evidence of magmatic activity similar to 20 km away. Furthermore, gravity and magnetic geophysical investigations indicate the presence of a pluton similar to 5 km below the surface of the Shuiyindong district. Based on in situ S isotope results and recent data indicating proximal intrusions, we interpret a deep magmatic S source for the ore fluids that formed the Guizhou sediment-hosted Au deposits. However, as the age for Au mineralization of Guizhou sediment-hosted Au deposits is still debated, the mineralization-magma connection remains hypothetical. Identifying an ore fluid source and time frame for Guizhou Au mineralization continues to be a critically important research goal for this district.