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Two-stage gold deposition in response to H2S loss from a single fluid in the Sizhuang deposit (Jiaodong, China)
Hu, Huan-Long1,2; Fan, Hong-Rui1,2,3; Liu, Xuan4; Cai, Ya-Chun1; Yang, Kui-Feng1,2; Ma, Wei-Dong1
2020-05-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume120Pages:16
AbstractThe material source, fluid evolution and mineralizing mechanism in the Jiaodong gold province have been hotly debated for several decades. The Sizhuang gold deposit provides an excellent object for studying these issues. Gold in this deposit mainly precipitated in the quartz-Au-pyrite (stage II) and quartz-Au-polymetallic (stage III) stages. Stage III can be further subdivided into the early stage III (chalcopyrite, galena with minor amounts of electrum, pyrrhotite, pyrite, siderite and sphalerite) and the late stage III (chalcopyrite, magnetite, siderite with a little pyrrhotite). Pyrite from stage II and stage III contains consistent delta S-34 signatures (8.1 parts per thousand-9.6 parts per thousand and 7.5 parts per thousand-9.8 parts per thousand, respectively) as well as trace elements (e.g. Co: 8.19 vs. 2.63 ppm, Ni: 3.54 vs. 0.74 ppm, As: 29.95 vs. 5.78 ppm, and Bi: 3.18 vs. 7.81 ppm). These consistent geochemical features combined with previous fluid inclusion and C-H-O isotope studies argue for a common source for ore-forming materials and fluids of the stage II and III at Sizhuang deposit. During the stage II and III, reduced sulfur species may have been lost from oreforming fluids in response to pyrite precipitation (HS- being scavenged by pyrite) and fluid immiscibility (H2S entering vapor phase), which led to the total sulfur concentration (Sigma S-total) decrease in the ore-forming fluids. Thermodynamic calculations at different Sigma S-total and constant pressure (2000 bar) and temperature (300 degrees C) in Fe-Cu-O-S-H system reveal that Sigma S-total decrease can lead to first enlargement and then shrinkage of pyrrhotite stability field with magnetite stability field being broadened to more acidic field; that sulfur species is dominated by H2S (> 90 mol%) under the bornite-pyrite phase boundaries in the acidic ore-forming fluids; and that decreases in H2S concentration can efficiently cause gold precipitation by reducing gold bisulfide solubility up to 2-3 orders of magnitude while Sigma S-total just decreases similar to 50 times. Pyrrhotite and magnetite precipitated due to enlarged stability field during this physicochemical process, which is in line with geologic observations. It is proposed that the two-stage gold deposition by H2S loss from a single ore-forming fluid could account for gold precipitation coupling with occurrence of pyrrhotite and magnetite in the mineral assemblage at Sizhuang deposit.
KeywordNanoSIMS In situ sulfur isotope Pyrite trace element Thermodynamic Single fluid Sizhuang gold deposit Jiaodong
DOI10.1016/j.oregeorev.2020.103450
Funding OrganizationNational Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordSULFUR ISOTOPE ANALYSIS ; ZIRCON U-PB ; TRACE-ELEMENT ; TECTONIC TRANSITION ; SANSHANDAO DEPOSIT ; SHANDONG PROVINCE ; INVISIBLE GOLD ; CARBON-DIOXIDE ; EASTERN CHINA ; MINERALIZATION
Language英语
Funding ProjectNational Key Research and Development Program[2016YFC0600105] ; National Natural Science Foundation of China[41672094]
Funding OrganizationNational Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000530673300043
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96744
Collection矿产资源研究院重点实验室
Corresponding AuthorFan, Hong-Rui
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Univ Lorraine, GeoRessources Lab, CREGU, CNRS, Vandoeuvre Les Nancy 54500, France
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Hu, Huan-Long,Fan, Hong-Rui,Liu, Xuan,et al. Two-stage gold deposition in response to H2S loss from a single fluid in the Sizhuang deposit (Jiaodong, China)[J]. ORE GEOLOGY REVIEWS,2020,120:16.
APA Hu, Huan-Long,Fan, Hong-Rui,Liu, Xuan,Cai, Ya-Chun,Yang, Kui-Feng,&Ma, Wei-Dong.(2020).Two-stage gold deposition in response to H2S loss from a single fluid in the Sizhuang deposit (Jiaodong, China).ORE GEOLOGY REVIEWS,120,16.
MLA Hu, Huan-Long,et al."Two-stage gold deposition in response to H2S loss from a single fluid in the Sizhuang deposit (Jiaodong, China)".ORE GEOLOGY REVIEWS 120(2020):16.
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