文献类型：期刊文献

英文题名：Alteration and paragenesis of the basalt-hosted Au deposits, southwestern Guizhou Province, China: Implications for ore genesis and exploration

作者：Li, Junhai Wu, Pan Xie, Zhuojun Liu, Jianzhong Zhang, Shuangju Song, Weifang Zhang, Bingqiang Li, Songtao Xu, Liangyi Zheng, Lulin

第一作者：Li, Junhai

通信作者：Xie, ZJ[1]

机构：[1]Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China;[2]Guizhou Bur Geol & Mineral Explorat & Dev, 105 Geol Party, Guiyang 550018, Peoples R China;[3]Minist Nat Resources Peoples Republ China, Innovat Ctr Ore Resources Explorat Technol Reg Be, Guiyang 550081, Peoples R China;[4]Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China;[5]Guizhou Bur Geol & Mineral Explorat Dev, Guiyang 550004, Peoples R China;[6]Guizhou Inst Technol, Guiyang 550003, Peoples R China;[7]Guizhou Educ Univ, Sch Geog & Resources, Guiyang 550018, Peoples R China;[8]Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China

第一机构：Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China

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

年份：2021

卷号：131

外文期刊名：ORE GEOLOGY REVIEWS

收录：;EI(收录号：20210909982452);Scopus(收录号：2-s2.0-85101398642);WOS:【SCI-EXPANDED(收录号:WOS:000632182700001)】；

基金：The authors are grateful to Rui Li and Xiang Li from the Institute of Geochemistry, Chinese Academy of Sciences (IGCAS) for assistance with SEM and EPMA, respectively. Liang Li from the Nanjing FocuMS Technology Co. Ltd is thanked for LA-ICP-MS analyses. We particularly thank Yimeng Zhao from the IGCAS for data collection and processing. This work was financially supported by grants from the Natural Science Foundation of China (41802088; U1812402; 42073044), Guizhou Bureau of Geology and Mineral Exploration & Development (Qian Di Kuang Ke He (2016) No. 12), Science and Technology Foundation of Guizhou Province (Qian Ke He Ping Tai Ren Cai [2018]5765; Qian Ke He Ji Chu [2020]1Z034), and the Youth Innovative Talents Program from Institute of Geochemistry, Chinese Academy of Sciences.

语种：英文

外文关键词：Basalt-hosted Au deposit; Carlin-type Au deposit; Jiadi deposit; Damaidi deposit; Dain-Qian-Gui area

摘要：Carlin-type Au deposits are dominantly hosted in sedimentary rocks. Recent exploration has identified two deposits (Jiadi and Damaidi) hosted in the Emeishan basalt in southwestern Guizhou Province, China, that contain Carlin-type mineralization. In this study, ore and alteration minerals from the two deposits were examined, mineral parageneses were established through detailed petrography, whole-rock chemistry and mineralogical studies, and results were compared with the sediment-hosted Carlin-type Au deposits. In both deposits, pre-ore stage minerals are mainly igneous minerals in basalt, including orthopyroxene, clinopyroxene, plagioclase, magnetite, and minor ilmenite and apatite. These minerals formed during the eruption and formation of the Emeishan Large Igneous Province. The Au ore-stage mineral assemblage consists of arsenian pyrite, arsenopyrite, illite, jasperoid quartz, (Fe)-dolomite (locally Ca-Mg-siderite), rutile, and apatite. This transition indicates that pre-ore basalt was altered to minerals that characterize Carlin-type ore. Electron probe microanalysis and laser ablation-inductively coupled plasma-mass spectrometry analyses show that the arsenian pyrite and arsenopyrite contain -457 ppm and -556 ppm Au, respectively, and are enriched in As, Cu, Sb, Hg, and Tl. Gold is ionically bound in the disseminated arsenian pyrite and arsenopyrite which formed during sulfidation. During the late-ore stage, open space-filling realgar, calcite, quartz, stibnite, and orpiment precipitated as the hydrothermal system cooled and collapsed. Post-ore stage minerals include hematite and chlorite, reflecting post-ore oxidation. Comparison studies indicate the two deposits share remarkable similarities to the Guizhou sediment-hosted Carlin-type Au deposits. The basalt-hosted and sediment-hosted Au deposits in Dian-Qian-Gui area formed in response to the same widespread metallogenic event. This study confirms that basalt can host Carlin-type Au mineralization. Future exploration for Carlin-type Au deposits in Dian-Qian-Gui area can be expanded into regions dominated by basalt, especially the anticlines above the unconformity between the Maokou limestone and Emeishan basalt.