Fluid evolution and gold precipitation in the Muping gold deposit (Jiaodong, China): Insights from in-situ trace elements and sulfur isotope of sulfides
文献类型：期刊论文
| 作者 | Zhang, Yong-Wen3,4; Hu, Fang-Fang1,3,4; Fan, Hong-Rui1,3,4; Liu, Xuan2; Feng, Kai3,4; Cai, Ya-Chun4 |
| 刊名 | JOURNAL OF GEOCHEMICAL EXPLORATION
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 218页码:20 |
| ISSN号 | 0375-6742 |
| 关键词 | Pyrite In-situ analysis Sulfur isotope Trace element Muping gold deposit Jiaodong |
| DOI | 10.1016/j.gexplo.2020.106617 |
| 英文摘要 | The Early Cretaceous Muping gold deposit is hosted in the Late Jurassic monzogranite. Crosscutting relations of ore veins implied a presence of multiple fluid pulses, and the mineralization process comprises four mineralization stages. Three generations/types of pyrite (Py1, Py2, and Py3) have been discriminated. Coarse-grained and euhedral Py1 pertains to pyrite-quartz veins. Coarse-fine grained and subhedral Py2 comes from quartzpyrite veins. Fine-grained and anhedral Py3 is from quartz-polymetallic sulfides veins. Py3 further can be divided into three sub-types (Py3a, Py3b, and Py3c), in which Py3a did not have a core-rim texture, Py3b is the core and Py3c is the rim of pyrite with core-rim texture. Py1 and Py2 contain relatively higher Co (738 and 29 ppm on median) and Ni (30 and 7.6 ppm on median), but lower As (754 and 15 ppm on median) and Au (median < 0.1 ppm) content. However, Py3 has extremely low Co and Ni (medians below detection), but elevated As (from 16,290 to 206 ppm on median) and Au (from 36 to 0.4 ppm on median) content. Co and Ni contents of pyrite gradually decreased but As content increased from Py1 to Py3, implied that the temperature of ore-forming fluids progressively decreases. Extremely higher As content and high delta S-34 of Py3c could be associated with an incursion of As-rich and heavy 8 34 S meteoric water which has flowed through meta-sedimentary rocks. Sulfur isotopes revealed a gradual decrease from Py1 (+11.6 parts per thousand) to Py3b ( + 7.5 parts per thousand). As for the pyrite with core-rim texture, the sulfur isotope progressively increased from the core (Py3b, + 6.0 parts per thousand) and the rim (Py3c, +11.8 parts per thousand). The high delta S-34 could be derived from the metasomatic and fertile lithospheric mantle, and the difference between Py1 and Py2 attributed to suffering from degassing processes with different condition. Rayleigh fractionation process caused a "reservoir effect" can explain the inside variations of Py2, while the increase of fO(2) caused by phase separation is the main factor leading to e s decrease for Py3. It is the fluid mixture that resulted in the inter-crystalline sulfur isotope variation of pyrite with core-rim texture. Gold and As contents for all types of pyrite plot well below the solubility limit for gold in arsenian pyrite, indicating that invisible gold occurs as Au1+ in the pyrite lattice. The extent of invisible gold was incorporated into pyrite depending on the arsenic content, but visible gold mineralization mainly was controlled by vapor phase escape and fO(2) increase which attributed to phase separation. |
| WOS关键词 | ORE-FORMING FLUIDS ; NORTH CHINA ; OROGENIC GOLD ; MESOZOIC GRANITOIDS ; SANSHANDAO DEPOSIT ; ARSENIAN PYRITE ; CARBON ISOTOPES ; VISIBLE GOLD ; SULU OROGEN ; MINERALIZATION |
| 资助项目 | National Key Research and Development Program[2016YFC0600105] ; National Natural Science Foundation of China[41772080] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000574829400006 |
| 资助机构 | National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98280]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Fan, Hong-Rui |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 2.Univ Lorraine, CNRS, CREGU, GeoRessources Lab, F-54500 Vandoeuvre Les Nancy, France 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yong-Wen,Hu, Fang-Fang,Fan, Hong-Rui,et al. Fluid evolution and gold precipitation in the Muping gold deposit (Jiaodong, China): Insights from in-situ trace elements and sulfur isotope of sulfides[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2020,218:20. |
| APA | Zhang, Yong-Wen,Hu, Fang-Fang,Fan, Hong-Rui,Liu, Xuan,Feng, Kai,&Cai, Ya-Chun.(2020).Fluid evolution and gold precipitation in the Muping gold deposit (Jiaodong, China): Insights from in-situ trace elements and sulfur isotope of sulfides.JOURNAL OF GEOCHEMICAL EXPLORATION,218,20. |
| MLA | Zhang, Yong-Wen,et al."Fluid evolution and gold precipitation in the Muping gold deposit (Jiaodong, China): Insights from in-situ trace elements and sulfur isotope of sulfides".JOURNAL OF GEOCHEMICAL EXPLORATION 218(2020):20. |
入库方式： OAI收割
来源：地质与地球物理研究所
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