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Mercury and in situ sulfur isotopes as constraints on the metal and sulfur sources for the world’s largest Sb deposit at Xikuangshan, southern China
Shanling Fu; Ruizhong Hu; Runsheng Yin; Jun Yan; Xifeng Mi; Zhengcheng Song; Neal A. Sullivan
2020
Source PublicationMineralium Deposita
Volume55Pages:1353–1364
Abstract

It has been well established that metal and sulfur sources in mineral deposits can be very difficult to identify, especially for ore deposits hosted in sedimentary rocks. Using the world’s largest Sb deposit at Xikuangshan in southern China as a case study, this study combined Hg isotopes and in situ sulfur isotope measurements to constrain the sources of Sb and sulfur. A variation of 1.1‰ in δ202Hg (0.04 to 1.15‰) was observed in stibnite ore samples, suggesting that mass-dependent fractionation of Hg isotopes occurred during the formation of the deposit. Significant mass-independent fractionation of Hg isotopes, with △199Hg ranging from − 0.03 to − 0.17‰, was also observed in the ore samples, suggesting that Hg transported by the ore fluids was inherited from Proterozoic basement metamorphic rocks as these rocks show similar △199Hg signatures (− 0.03 to 0.07‰). In situ sulfur isotope measurements yielded δ34S values that cluster in the range of + 6.8 to + 10.2‰, providing evidence that sulfur contained in ore fluids may also have been dominantly derived from underlying Proterozoic basement metamorphic rocks (δ34S = +5.6 to + 11.5‰). Using the new results from Hg and S isotopes, we proposed that deep-circulated meteoric water mobilized Sb, Hg, and S from the Proterozoic metamorphic basement, ascended along deep faults, and subsequently deposited Sb at favorable structural zones as a result of boiling of the hydrothermal fluids, generating the world-class Xikuangshan Sb deposit. This study also highlights the combined use of Hg-S isotopes as a novel method to provide new and additional insights into the source regions of ore materials for sedimentary-hosted Sb deposits.

KeywordHg Isotopes in Situ Sulfur Isotopes source Of Ore Metals xikuangshan Sb Deposit
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10522
Collection矿床地球化学国家重点实验室
Affiliation1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.Department of Earth Sciences, University of Toronto, Toronto M5S 3B1, Canada
3.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
Recommended Citation
GB/T 7714
Shanling Fu,Ruizhong Hu,Runsheng Yin,等. Mercury and in situ sulfur isotopes as constraints on the metal and sulfur sources for the world’s largest Sb deposit at Xikuangshan, southern China[J]. Mineralium Deposita,2020,55:1353–1364.
APA Shanling Fu.,Ruizhong Hu.,Runsheng Yin.,Jun Yan.,Xifeng Mi.,...&Neal A. Sullivan.(2020).Mercury and in situ sulfur isotopes as constraints on the metal and sulfur sources for the world’s largest Sb deposit at Xikuangshan, southern China.Mineralium Deposita,55,1353–1364.
MLA Shanling Fu,et al."Mercury and in situ sulfur isotopes as constraints on the metal and sulfur sources for the world’s largest Sb deposit at Xikuangshan, southern China".Mineralium Deposita 55(2020):1353–1364.
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