IGGCAS OpenIR  > 地球与行星物理院重点实验室
Genesis and evolution of framboidal pyrite and its implications for the ore-forming process of Carlin-style gold deposits, southwestern China
Zhao, Jing1; Liang, Jinlong2; Long, Xiaoping1; Li, Jun2; Xiang, Qirong2; Zhang, Jianchao3; Hao, Jialong3
2018-11-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume102Pages:426-436
AbstractSouthwestern Guizhou, an indispensable component of the "golden triangle" area of southwestern China, is famous for its numerous Carlin-style gold deposits. Unlike other sulfides in the deposits that have been well studied, the genesis of framboidal pyrite is still controversial because of its tiny size. Here, we first determined the chemical and in situ sulfur isotopic compositions of framboidal pyrites from three typical Carlin-style gold deposits (namely Shuiyindong, Taipingdong and Nibao) using secondary electron image (SEI), back scattered electron (BSE), electron probe micro analysis (EPMA), and nanometer-scale secondary ion mass spectroscopy (Nano-SIMS) methods. Our EPMA data show that the framboidal pyrites contain a minor amount of trace elements (Ni < 0.344 wt%, Co = 0.017-0.295 wt%, Cr = 0.009-0.292 wt% and As < 1.479 wt%). Incorporation of the trace elements into the framboidal pyrites resulted in a slight decrease in S and Fe concentrations compared to the theoretical values. The in situ delta S-34 values of the framboidal pyrites, ranging from -53.2 parts per thousand to -30.9 parts per thousand, are in good agreement with the sulfur isotopic fractionation triggered by the bacterial sulfate reduction (BSR) process in an open-SO42- ocean condition. Combined with SEI, BSE, and Nano-SIMS high-resolution multiple elemental mapping, four consecutive processes responsible for their genesis and evolution are summarized as follows: (1) initial microcrystal nucleation via the BSR process, (2) abundant microcrystal aggregation to form individual framboid and multiple-framboids during sedimentation or diagenesis, (3) partial replacement and recrystallization of preexisting framboids by As-rich ore fluids, and (4) eventual framboidal pyrite transformation to larger euhedral grains via continuous recrystallization. These processes not only present compelling mechanisms responsible for the variations in morphology and chemical composition of the framboidal pyrites, from the initial framboid with a low (AsS)-As-75-S-32 signal (Py1) to the framboid with a recrystallization origin (Py3), but also indicate that their genesis and evolution may have an intimate correlation with the formation of Carlin-style gold deposits.
KeywordFramboidal pyrite Carlin-style deposit Nano-SIMS Elemental mapping Genesis and evolution
DOI10.1016/j.oregeorev.2018.09.022
Funding OrganizationNational Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; National Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; National Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; National Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics
WOS KeywordSULFUR ISOTOPES ; ARSENIAN PYRITE ; TRACE-ELEMENTS ; NEVADA ; ORIGIN ; GUIZHOU ; TREND ; GEOCHEMISTRY ; SEDIMENTARY ; MECHANISMS
Language英语
Funding ProjectNational Geological Survey Foundation of China[12120113095500] ; National Key Research and Development Program of China[2016YFC0601003] ; National Natural Science Foundation of China[41421002] ; National Natural Science Foundation of China[41273031] ; MOST Special Fund from the State Key Laboratory of Continental Dynamics
Funding OrganizationNational Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; National Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; National Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; National Geological Survey Foundation of China ; National Geological Survey Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics ; MOST Special Fund from the State Key Laboratory of Continental Dynamics
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000453493100021
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90272
Collection地球与行星物理院重点实验室
Corresponding AuthorLiang, Jinlong; Long, Xiaoping
Affiliation1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China
2.Chengdu Univ Technol, Dept Geochem, Chengdu 610059, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Jing,Liang, Jinlong,Long, Xiaoping,et al. Genesis and evolution of framboidal pyrite and its implications for the ore-forming process of Carlin-style gold deposits, southwestern China[J]. ORE GEOLOGY REVIEWS,2018,102:426-436.
APA Zhao, Jing.,Liang, Jinlong.,Long, Xiaoping.,Li, Jun.,Xiang, Qirong.,...&Hao, Jialong.(2018).Genesis and evolution of framboidal pyrite and its implications for the ore-forming process of Carlin-style gold deposits, southwestern China.ORE GEOLOGY REVIEWS,102,426-436.
MLA Zhao, Jing,et al."Genesis and evolution of framboidal pyrite and its implications for the ore-forming process of Carlin-style gold deposits, southwestern China".ORE GEOLOGY REVIEWS 102(2018):426-436.
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