Genesis of the Wutuogou Ag-Pb-Zn deposit in the Eastern Kunlun Orogenic Belt, NW China: Constraints from calcite U-Pb geochronology, mineral chemistry, and in-situ sulfur isotopes
文献类型：期刊论文
| 作者 | Wang, Shuang3; Li, Weiwei3; Zhao, Xu1,6; Huizenga, Jan Marten4,5; Zhang, Xinming3; Xu, Chongwen3; Yu, Siqi3; Li, Yanjun3; Wei, Junhao2,3 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 165页码:17 |
| 关键词 | Calcite U -Pb age Mineral chemistry In-situ sulfur isotopes Vein-type Ag -Pb -Zn deposit Eastern Kunlun Orogenic Belt |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2024.105880 |
| 英文摘要 | The Wutuogou Ag-Pb-Zn deposit, a newly discovered vein-type deposit, is located in the Eastern Kunlun Orogenic Belt (EKOB), northwestern China. The vein-type Ag-Pb-Zn ore bodies are hosted in Middle Triassic granodiorite and monzogranite and are characterized by high-grade Ag, Pb, and Zn (average Ag: 293 g/t, Pb: 3.00 %, Zn: 2.85 %). Three paragenetic stages have been recognized: quartz + pyrite (Py-1) + arsenopyrite (stage I), pyrite (Py-2) + sphalerite + chalcopyrite + tetrahedrite + quartz (substage II-1), galena + pyrargyrite + freibergite + freieslebenite + quartz + calcite (substage II-2), and quartz + calcite (stage III). Except for Ag-bearing minerals (pyrargyrite, freibergite, and freieslebenite), invisible silver is also present in pyrite (1.91-165 ppm), sphalerite (3.86-8806 ppm), and galena (up to 0.21 wt%). The calcite is closely associated with sulfides in substage II-2 and yields a U-Pb age of 210 +/- 7 Ma (MSWD = 2.7), which represents the ore-forming age (lower limit). Py-1 displays higher As contents and lower Co contents than those of Py-2, indicating a decrease in temperature from stage I to stage II. In addition, the Fe/Zn mass ratios (0.025-0.075) of sphalerite estimate the fluid temperature for substage II-1 of 246-284 degrees C, whereas the Ag/(Ag + Cu) and Zn/(Zn + Fe) mole ratios of freibergite estimate the fluid temperature for substage II-2 of 140-270 degrees C, further indicating the decrease of temperature from stage I through substage II-1 to substage II-2. Mineral assemblages of pyrite-chalcopyrite-tetrahedrite in substage II-1 and Ag-sulfosalts in substage II-2 suggest a decrease in sulfur fugacity (fS(2)). Both the decrease in fS(2) and cooling of the mineralizing fluids facilitate silver precipitation. The heterogeneous compositions of the freibergite and the Ag zonation in sphalerite (Sp-1) resulted from retrograde solid-state reactions that redistributed Ag through microscale exsolution. The delta S-34 values (+5.49 to +7.78 parts per thousand) of the sulfides and the low Zn/Cd ratios (107-195) of sphalerite indicate a felsic magma source for the ore-forming materials. Therefore, we concluded that the Wutuogou Ag-Pb-Zn deposit corresponds to a medium- to low-temperature magmatic-hydrothermal deposit associated with Late Triassic magmatism in the Eastern Kunlun Orogenic Belt (EKOB). |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001161384300001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76246]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Zhao, Xu; Wei, Junhao |
| 作者单位 | 1.Yunnan Univ, Sch Earth Sci, Kunming 650500, Peoples R China 2.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Hubei, Peoples R China 3.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China 4.James Cook Univ, Econ Geol Res Inst EGRU, Coll Sci & Engn, Townsville, Qld 4811, Australia 5.Norwegian Univ Life Sci, Fac Environm Sci & Nat Resource Management, Postbox 503, NO-1432 As, Norway 6.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shuang,Li, Weiwei,Zhao, Xu,et al. Genesis of the Wutuogou Ag-Pb-Zn deposit in the Eastern Kunlun Orogenic Belt, NW China: Constraints from calcite U-Pb geochronology, mineral chemistry, and in-situ sulfur isotopes[J]. ORE GEOLOGY REVIEWS,2024,165:17. |
| APA | Wang, Shuang.,Li, Weiwei.,Zhao, Xu.,Huizenga, Jan Marten.,Zhang, Xinming.,...&Wei, Junhao.(2024).Genesis of the Wutuogou Ag-Pb-Zn deposit in the Eastern Kunlun Orogenic Belt, NW China: Constraints from calcite U-Pb geochronology, mineral chemistry, and in-situ sulfur isotopes.ORE GEOLOGY REVIEWS,165,17. |
| MLA | Wang, Shuang,et al."Genesis of the Wutuogou Ag-Pb-Zn deposit in the Eastern Kunlun Orogenic Belt, NW China: Constraints from calcite U-Pb geochronology, mineral chemistry, and in-situ sulfur isotopes".ORE GEOLOGY REVIEWS 165(2024):17. |
入库方式： OAI收割
来源：广州地球化学研究所
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