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Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation
Zeng, Zhigang1,2,3,4; Ma, Yao1,3; Chen, Shuai1; Selby, David5; Wang, Xiaoyuan1,2; Yin, Xuebo1
2017-07-01
发表期刊ORE GEOLOGY REVIEWS
卷号87页码:155-171
文章类型Article
摘要Studies of sulfur and lead isotopic compositions in hydrothermal deposits are an important tool to determine the source and processes of both sulfur and lead, and to understand the origin of hydrothermal ore deposits. Here, the sulfur and lead isotopic compositions of sulfide minerals have been studied for different hydrothermal fields in the East Pacific Rise (EPR), Mid-Atlantic Ridge (MAR), Central Indian Ridge (CIR), Southwest Indian Ridge (SWIR), and North Fiji Basin (NFB). The sulfur isotopic compositions of the studied sulfide samples are variable (delta S-34 0.0 to 9.6 parts per thousand, avg. delta S-34 4.7 parts per thousand; n = 60), being close to the associated igneous rocks (similar to 0 parts per thousand for, e.g., basalt, serpentinized peridotite), which may reflect the S in the sulfide samples is derived mainly from the associated igneous rocks, and a relatively small proportion (<36%) of seawater sulfur incorporated into these sulfides during mixing between seawater (delta S-34 21%.) and hydrothermal fluid. In contrast for a mixed origin for the source of S, the majority of the lead isotopic compositions (Pb-206/Pb-204 17.541 +/- 0.004 to 19.268 +/- 0.001, (207)pb/(204)pb 15.451 0.001 to +/- 15.684 +/- 0.001, Pb-208/Pb-204 37.557 +/- 0.008 to 38.988 +/- 0.002, n = 21) of the sulfides possess a basaltic Pb isotopic composition, suggesting that the lead in the massive sulfide is mainly leached from local basaltic rocks that host the sub-seafloor hydrothermal systems in sediment-free mid-ocean ridges and mature back-arc basins. Furthermore, sulfide minerals in the super-fast and fast spreading mid-ocean ridges (MORs) exhibit less spread in their the delta S-34 values compared to sulfides from super-slow, and slow spreading MORs, which is most easily explained as a lesser degree of fluid-rock interaction and hydrothermal fluid-seawater mixing during hydrothermal ore-forming process. Additionally, the S and Pb isotope compositions of sulfides are controlled by the fluid processes for forming seafloor massive sulfide deposits. We demonstrate that the variable sulfur and lead isotopic compositions exhibit a relationship with the sulfur and lead sources, fluid-rock interaction, and fluid-seawater mixing. (C) 2016 Elsevier B.V. All rights reserved.
关键词Sulfur And Lead Isotopic Compositions Massive Sulfides Seafloor Hydrothermal Systems
DOI10.1016/j.oregeorev.2016.10.014
收录类别SCI
语种英语
WOS记录号WOS:000405880900013
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/137071
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Qingdao 266071, Peoples R China
5.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
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Zeng, Zhigang,Ma, Yao,Chen, Shuai,et al. Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation[J]. ORE GEOLOGY REVIEWS,2017,87:155-171.
APA Zeng, Zhigang,Ma, Yao,Chen, Shuai,Selby, David,Wang, Xiaoyuan,&Yin, Xuebo.(2017).Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation.ORE GEOLOGY REVIEWS,87,155-171.
MLA Zeng, Zhigang,et al."Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation".ORE GEOLOGY REVIEWS 87(2017):155-171.
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