Conditions and processes leading to large-scale gold deposition in the Jiaodong province, eastern China
文献类型：期刊论文
| 作者 | Fan, Hongrui5,6,7; Lan, Tingguang2,7; Li, Xinghui5,7; Santosh, M.1; Yang, Kuifeng5,6,7; Hu, Fangfang5,6,7; Feng, Kai4,5,6; Hu, Huanlong2,5,6; Peng, Hongwei3,5,6; Zhang, Yongwen5,6 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 64期号:9页码:1504-1523 |
| 关键词 | Mineral precipitation Mineral assemblage Gold fineness Ore-forming condition and processes Gold deposit Jiaodong |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-020-9789-2 |
| 英文摘要 | The gold deposits in the Jiaodong Peninsula constitute the largest gold mineralized province in China. The mineralization shows common characteristics in their tectonic setting, ore-forming fluid and metallogenic system. Sulfidation and fluid immiscibility are two important mechanisms controlling gold precipitation, both of which consume sulfur in the ore-forming fluids. The escape of H2S from the main ore-forming fluids and the decrease of total sulfur concentration not only lead to the efficient precipitation of gold, but also result in the crystallization of reducing minerals such as pyrrhotite and oxidizing minerals such as magnetite. Quartz solubility shows strong dependence on temperature, pressure, and CO2 content. The dependence of quartz solubility on pressure is weak at low temperatures, and progressively stronger at higher temperatures. Similarly, the temperature dependence of quartz solubility is relatively low at low pressures, but becomes gradually stronger at high pressures. The results of solubility modeling can constrain the dissolution and reprecipitation behavior of quartz in the ore-forming veins and the formation mechanism of different types of quartz veins. The multi-stage mineralization fluid activity resulted in the complex dissolution structure of quartz in the Jiaodong gold veins. Pyrite in the main metallogenic period in the Jiaodong gold deposits shows complex microstructure characteristics at single crystal scale. The trace elements (mainly the coupling of As- and Au-rich belt) and sulfur isotope composition also display a certain regularity. The As-rich fluids might have formed by the initial pulse of ore-forming fluids through As-rich metasedimentary strata, while the As-Au oscillation zone at the margin of pyrite grains is related to the pressure fluctuation caused by fault activity and the local phase separation of fluids. There is a temporal and spatial evolution of gold fineness in the Jiaodong gold deposits. Water/rock reaction (sulfidation) was the main ore-forming mechanism of early gold mineralization, forming relatively high fineness gold, while significant pressure drop in the shallow part accompanied by fluid phase separation promoted the late gold mineralization, forming low fineness gold. Under cratonic destruction setting, dehydration of the amphibolite and granulite facies metamorphic lower-crust resulted in the formation of Au-CO2-rich ore-forming fluids, which rose along the deep fault and secondary structure, and formed the largescale fault-controlled gold deposits in Jiaodong. |
| WOS关键词 | LOWER CRUST BENEATH ; HYDROTHERMAL FLUID EVOLUTION ; EQUATION-OF-STATE ; NORTH CHINA ; U-PB ; PHASE-EQUILIBRIA ; METAMORPHIC DEVOLATILIZATION ; SANSHANDAO DEPOSIT ; GEOLOGICAL FLUIDS ; SHANDONG PROVINCE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000690926100007 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102597]  |
| 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, Hongrui |
| 作者单位 | 1.China Univ Geosci Beijing, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China 3.Cent South Univ, Sch Geosci & Info Phys, Changsha 410012, Peoples R China 4.BGRIMM Technol Grp, State Key Lab Mineral Proc, Beijing 102628, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 7.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Hongrui,Lan, Tingguang,Li, Xinghui,et al. Conditions and processes leading to large-scale gold deposition in the Jiaodong province, eastern China[J]. SCIENCE CHINA-EARTH SCIENCES,2021,64(9):1504-1523. |
| APA | Fan, Hongrui.,Lan, Tingguang.,Li, Xinghui.,Santosh, M..,Yang, Kuifeng.,...&Zhang, Yongwen.(2021).Conditions and processes leading to large-scale gold deposition in the Jiaodong province, eastern China.SCIENCE CHINA-EARTH SCIENCES,64(9),1504-1523. |
| MLA | Fan, Hongrui,et al."Conditions and processes leading to large-scale gold deposition in the Jiaodong province, eastern China".SCIENCE CHINA-EARTH SCIENCES 64.9(2021):1504-1523. |
入库方式： OAI收割
来源：地质与地球物理研究所
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