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New insights about the origin of the Shilu Fe-Cu-Co deposit, Hainan Island, South China, with emphasis on the regional metallogeny

文献类型:期刊论文

作者Wei Terry Chen; Mei-Fu Zhou; Yanwen Tang
刊名Mineralium Deposita
出版日期2022
卷号57页码:1415–1430
关键词Shilu Deposit iocg Deposit Sin Quyen Ailao Shan-red River Shear Zone Re-os Dating
DOI10.1007/s00126-022-01113-3
英文摘要

The giant Shilu Fe-Cu-Co deposit in Hainan Island, South China, which was structurally and hydrothermally superimposed, is mainly hosted in highly metasomatized dolostones/marbles of the ~ 900 Ma Shilu Group. This study confirmed that the ore bodies are originally strata-bound and epigenetic, but do not have spatial relations with any coeval intrusions. In this study, the paragenetic sequence of the pre-deformation mineralization is refined and consists of early Ca-silicate alteration (I), Fe (II), and Cu-Co (III) mineralization stages, followed by multiple overprints and/or undeformed veins (stage IV). Our new oxygen and in situ Pb–S isotopic results for stages I to III show that the mineralizing fluids were initially magmatic-hydrothermal but have undergone variable degrees of interaction with country rocks during mineralization. On the other hand, stage IV fluids have in situ Pb–S isotopic compositions indicative of significant contributions of early-stage components through secondary re-mobilization. These features, in combination with chemical compositions of Fe oxides (e.g., elevated Ti in hematite), strongly argue that the Shilu deposit does not belong to BIF as previously considered, but is typical of magmatic-hydrothermal IOCG deposits. New sulfide Re-Os isotopic data show that the major Fe-Cu-Co mineralization formed at 780 ± 24 Ma (MSWD = 0.62). The deposit is confirmed to be broadly comparable to Neoproterozoic IOCG deposits in the Ailao Shan-Red River shear zone in terms of timing and nature of mineralization. Given that the shear zone likely extends to Hainan Island, the Shilu deposit is considered to be part of the same IOCG metallogenic belt and similar mineralization along the shear zone may be more widespread than previously thought.

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语种英语
源URL[http://ir.gyig.ac.cn/handle/42920512-1/13618]  
专题地球化学研究所_矿床地球化学国家重点实验室
作者单位1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
2.University of Chinese Academy of Sciences, Beijing, 100049, China
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Wei Terry Chen,Mei-Fu Zhou,Yanwen Tang. New insights about the origin of the Shilu Fe-Cu-Co deposit, Hainan Island, South China, with emphasis on the regional metallogeny[J]. Mineralium Deposita,2022,57:1415–1430.
APA Wei Terry Chen,Mei-Fu Zhou,&Yanwen Tang.(2022).New insights about the origin of the Shilu Fe-Cu-Co deposit, Hainan Island, South China, with emphasis on the regional metallogeny.Mineralium Deposita,57,1415–1430.
MLA Wei Terry Chen,et al."New insights about the origin of the Shilu Fe-Cu-Co deposit, Hainan Island, South China, with emphasis on the regional metallogeny".Mineralium Deposita 57(2022):1415–1430.

入库方式: OAI收割

来源:地球化学研究所

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