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Multiple element mapping and in-situ S isotopes of Au-carrying pyrite of Shuiyindong gold deposit, southwestern China using NanoSIMS: Constraints on Au sources, ore fluids, and mineralization processes
Liang, Jinlong1; Li, Jie2,3; Liu, Xuemin1; Zhai, Wei4; Huang, Yi1; Zhao, Jing5; Sun, Weidong3,6,7; Song, Mingchun8; Li, Jianzhong1,9
2020-08-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume123Pages:16
Corresponding AuthorLi, Jie(lijiesue@163.com)
AbstractThis study employed high-sensitivity and high-resolution secondary ionizing mass spectrometry (NanoSIMS) to determine the distribution of Au, As, Cu, Se, and S isotopes of pyrite from the Shuiyindong Au deposit, southwestern China. NanoSIMS maps show that Au occurs as solid solution, and heterogeneously distributes at micron scale in the ore pyrite, which is the overgrowth of the preexisting synsedimentary or hydrothermal pyrite core, commonly rimmed again by the As- and Au-poor outermost zone. There is no detectable Au in the synsedimentary pyrite. Invisible Au was observed to fill in the submicron-scale cracks of the ore pyrite. Meanwhile, element line profile analysis shows that Au occurs in three discrete climaxes in the ore pyrite. In-situ S isotopic analyses identified two types of S sources. The synsedimentary pyrites have large negative delta S-34 values ranging from - 38.3 parts per thousand to -18.8 parts per thousand, which is a typical biogenetic S generated by bacterial reduction of sea water sulfate. The hydrothermal pyrites with zoned texture have a narrow delta S-34 range of - 3.5 parts per thousand similar to-7.4 parts per thousand with a median of 2.3 parts per thousand, similar to the recently published sulfur isotope data of the Southwest China's Carlin-type gold deposits except for the Lannigou Mine. Combining the distribution of Au and S isotopes in pyrite indicates that the Aucarrying zones have lower delta S-34 values than that of the ore-unrelated zones. These NanoSIMS observations indicate that the Au mineralization was closely associated with strong deformation of the host rock. The Au forming the deposit was exotic, instead of the reactivated Au in the preexisting pyrite formed in the synsedimentary basin. The mineralization progress was multistage. The distribution of Au and S isotopes is hard to interpret by the viewpoint of metamorphic fluid or fluid pressure fluctuation. Instead, it is more consistent with magmatic fluid, likely contaminated by sedimentary sulfur during its ascending to the surface. In addition, the multistage ore formation pattern discovered in this study poses new challenges to determine the mineralization age of the Au deposits in southwestern China.
KeywordShuiyindong gold deposit NanoSIMS elements mapping In-situ sulfur isotopes Mineralization processes Southwestern China
DOI10.1016/j.oregeorev.2020.103576
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDA22050103] ; National Natural Science Foundation of China[41273031] ; National Natural Science Foundation of China[41573034] ; National Natural Science Foundation Youth Fund[41603044] ; Taishan Scholar Special Project Funds[ts201511076] ; Key Research and Development Project of Shandong Province[2017CXGC1604] ; Program of Isotope Identification for Anomalous Sources of Deep-penetration Geochemistry[2016YFC0600604]
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000540196600020
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/167742
Collection深海极端环境与生命过程研究中心
Corresponding AuthorLi, Jie
Affiliation1.Chengdu Univ Technol, Dept Geochem, Chengdu 610059, Peoples R China
2.Hebei GEO Univ, Sch Resources, Shijiazhuang 050031, Hebei, Peoples R China
3.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China
4.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510006, Peoples R China
5.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China
7.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
8.Shandong Prov Bur Geol & Mineral Resources, Jinan 250013, Peoples R China
9.Chinese Gold Armed Police Army, Branch 12, Chengdu 610036, Peoples R China
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liang, Jinlong,Li, Jie,Liu, Xuemin,et al. Multiple element mapping and in-situ S isotopes of Au-carrying pyrite of Shuiyindong gold deposit, southwestern China using NanoSIMS: Constraints on Au sources, ore fluids, and mineralization processes[J]. ORE GEOLOGY REVIEWS,2020,123:16.
APA Liang, Jinlong.,Li, Jie.,Liu, Xuemin.,Zhai, Wei.,Huang, Yi.,...&Li, Jianzhong.(2020).Multiple element mapping and in-situ S isotopes of Au-carrying pyrite of Shuiyindong gold deposit, southwestern China using NanoSIMS: Constraints on Au sources, ore fluids, and mineralization processes.ORE GEOLOGY REVIEWS,123,16.
MLA Liang, Jinlong,et al."Multiple element mapping and in-situ S isotopes of Au-carrying pyrite of Shuiyindong gold deposit, southwestern China using NanoSIMS: Constraints on Au sources, ore fluids, and mineralization processes".ORE GEOLOGY REVIEWS 123(2020):16.
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