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DOI | 10.1016/j.oregeorev.2023.105866 |
A rare sellaite-bearing orogenic gold deposit at Pianyanzi, Yangtze Craton: Ore genesis as implied from in-situ studies of pyrite | |
发表日期 | 2024 |
ISSN | 0169-1368 |
EISSN | 1872-7360 |
起始页码 | 165 |
卷号 | 165 |
英文摘要 | The Pianyanzi gold deposit is situated at the western margin of the Yangtze Craton, and represents a rare sellaitebearing orogenic gold deposit. This deposit belongs to the Dauduhe gold belt of southwestern China and remains poorly documented. In this paper we present first petrographic and in -situ geochemistrical and sulfur isotope data from pyrite as well as results of multielement mapping. The deposit is dominated by native gold (average gold fineness = 980.8) filling fractures in minerals (e.g., pyrite, quartz, sellaite and hematite) or also emplaced along the contact interface between mineral grains. Pyrite is the most abundant sulfide mineral of this deposit. We identified five generations of pyrite: Py1, Py2a, Py2b, Py3, and Py4. Gold occurs in sellaiteand hematite-bearing mineral assemblages formed simultaneous with the formation of Py2a&b and Py4, respectively. Py1 formed in the Au-poor ore stage, while Py3 formed during the late galena-dominated sulfide stage. All generations of pyrite exhibit low concentrations of gold with an average value of less than 2 ppm. Py2a&b possess distinctive textures and chemical zonation, with trace elements displaying greater variations compared to Py1, Py3 and Py4. The delta 34S values vary from -0.52 %o to 7.08 %o, which is consistent with those of orogenic deposits of the Daduhe gold belt. The deep metasomatized mantle lithosphere acted as a potential source of ore fluids. We conclude that the co-precipitation of native gold and sellaite was triggered by the interaction between auriferous fluids and dolomite. |
英文关键词 | Sellaite; Pyrite; In -situ analyses; Orogenic gold deposit; Ore genesis; Pianyanzi |
语种 | 英语 |
WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
WOS类目 | Geology ; Mineralogy ; Mining & Mineral Processing |
WOS记录号 | WOS:001158146400001 |
来源期刊 | ORE GEOLOGY REVIEWS
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/300629 |
作者单位 | Southwest Jiaotong University; Chengdu University of Technology; Russian Academy of Sciences; Sobolev Institute of Geology & Mineralogy of the Russian Academy of Sciences |
推荐引用方式 GB/T 7714 | . A rare sellaite-bearing orogenic gold deposit at Pianyanzi, Yangtze Craton: Ore genesis as implied from in-situ studies of pyrite[J],2024,165. |
APA | (2024).A rare sellaite-bearing orogenic gold deposit at Pianyanzi, Yangtze Craton: Ore genesis as implied from in-situ studies of pyrite.ORE GEOLOGY REVIEWS,165. |
MLA | "A rare sellaite-bearing orogenic gold deposit at Pianyanzi, Yangtze Craton: Ore genesis as implied from in-situ studies of pyrite".ORE GEOLOGY REVIEWS 165(2024). |
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