Ore-forming process within the Hongyuan reduced porphyry Mo-Cu deposit, West Junggar, NW China
文献类型：期刊论文
| 作者 | Wu, Chu8; Hong, Tao5,9,10; Zhang, Hui-Jun6,8; Xu, Xing-Wang1,2,3; Wang, Cheng-Xi8; Zheng, Xiao8; Zhang, Guo-Liang4; Niu, Lei1; Ke, Qiang1; Dong, Lian-Hui7 |
| 刊名 | GEOLOGICAL JOURNAL
 |
| 出版日期 | 2023-06-12 |
| 页码 | 26 |
| ISSN号 | 0072-1050 |
| 关键词 | He-Ar isotopes Hongyuan reduced porphyry Mo-Cu deposits West Junggar |
| DOI | 10.1002/gj.4813 |
| 英文摘要 | The Hongyuan porphyry Mo-Cu deposit (PMCD) is a rare example of a "reduced" deposit, in contrast to classical oxidized porphyry Cu or Mo-Cu deposits. It is characterized by an ilmenite-series I-type felsic granitoid intrusion, reduced ore-forming fluids with methane-rich fluid inclusions, and widely distributed primary pyrrhotite. Mo-Cu mineralization in the Hongyuan PMCD occurs as disseminated in porphyry, granular in miarolitic cavity, and vein-type in the quartz vein. These three types of mineralization are generally produced in the late magmatic period, magmatichydrothermal transition period, and hydrothermal period, respectively. Molybdenite from miarolitic cavities shows a greater contribution from mantle fluid, as evidenced by mantle He proportions of 37.6%-16.8%. Molybdenite in quartz veins has relatively lower mantle He proportions of 1.63%-10.5%, indicating a predominantly crustal fluid source. The He-3/He-4 variations of these two groups of molybdenite illustrate an increasing input of crustal fluid during the magmatic to hydrothermal transition. Molybdenite samples from miarolitic cavities and quartz veins yield a Re-Os model age of 300.5 +/- 3.7 Ma, which is consistent with the U-Pb ages of zircons in the wallrock porphyries (300-302 Ma). This further indicates simultaneous diagenesis accompanied by mineralization. The Sr-Nd isotopic compositions (initial Sr-87/Sr-86: 0.703404-0.703552; initial Nd-143/Nd-144: 0.512585-0.512655; epsilon(Nd)[t]: +6.56 to +7.90) and young T-2DM model ages (421-531 Ma) of the Hongyuan porphyries suggest that these rocks were derived from partial melting of the basaltic lower crust. We propose that mantle-derived fluids rose up and mixed with fluids from the lower crust under an extensional tectonic setting, forming mantle-like Sr-Nd-He-Ar isotopic compositions. The pre-mineralization stage of the Hongyuan reduced PMCD is marked by quartz-molybdenite +/- K-feldspar +/- pyrite veins or veinlets and miarolitic cavities in the intensively potassic alteration zone. These veins formed at high temperatures (400-476 degrees C) and high salinities (47.5-56.6 wt.%). The syn-mineralization stage is the main metallogenic stage represented by numerous quartz-molybdenite +/- pyrrhotite veins associated with moderate to high temperatures (248 degrees C-424 degrees C) and low to high salinities (1.57-50.1 wt.%). The post-mineralization stage is characterized by low temperatures (104-270 degrees C) and low salinities (0.35-8.81 wt.%). Fluid immiscibility, mixing with meteoric water, ore fluid-wall rock interactions, and decreasing temperature and salinity have played important roles during molybdenum mineralization. |
| WOS关键词 | ZIRCON U-PB ; LA-ICP-MS ; TECTONIC EVOLUTION ; FLUID INCLUSIONS ; CONTINENTAL ARC ; TRACE-ELEMENTS ; NEW-MEXICO ; HYDROTHERMAL FLUIDS ; COPPER-DEPOSITS ; GOLD DEPOSITS |
| 资助项目 | National Natural Science Foundation of China[42272075] ; National Natural Science Foundation of China[42250202] ; National Natural Science Foundation of China[41802093] ; Project of Development and Research Center of China Geology Survey[DD20230600] ; Project of Development and Research Center of China Geology Survey[DD20230356] ; Project of Development and Research Center of China Geology Survey[DD20221692] ; Project of Xinjiang Bureau of Geology and Mineral Resources[2011BAB06B03-3] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:001016788800001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Project of Development and Research Center of China Geology Survey ; Project of Development and Research Center of China Geology Survey ; Project of Xinjiang Bureau of Geology and Mineral Resources ; Project of Xinjiang Bureau of Geology and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Project of Development and Research Center of China Geology Survey ; Project of Development and Research Center of China Geology Survey ; Project of Xinjiang Bureau of Geology and Mineral Resources ; Project of Xinjiang Bureau of Geology and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Project of Development and Research Center of China Geology Survey ; Project of Development and Research Center of China Geology Survey ; Project of Xinjiang Bureau of Geology and Mineral Resources ; Project of Xinjiang Bureau of Geology and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Project of Development and Research Center of China Geology Survey ; Project of Development and Research Center of China Geology Survey ; Project of Xinjiang Bureau of Geology and Mineral Resources ; Project of Xinjiang Bureau of Geology and Mineral Resources |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111289]  |
| 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 | Hong, Tao; Zhang, Hui-Jun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Space Star Technol Co Ltd, Beijing, Peoples R China 5.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China 6.Dev & Res Ctr China Geol Survey, Beijing 100037, Peoples R China 7.Xinjiang Bur Geol & Mineral Resources, Urumqi, Xinjiang, Peoples R China 8.Dev & Res Ctr China Geol Survey, Beijing, Peoples R China 9.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou, Peoples R China 10.Southern Marine Sci & Engn Guangdong Lab, Zhuhai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Chu,Hong, Tao,Zhang, Hui-Jun,et al. Ore-forming process within the Hongyuan reduced porphyry Mo-Cu deposit, West Junggar, NW China[J]. GEOLOGICAL JOURNAL,2023:26. |
| APA | Wu, Chu.,Hong, Tao.,Zhang, Hui-Jun.,Xu, Xing-Wang.,Wang, Cheng-Xi.,...&Dong, Lian-Hui.(2023).Ore-forming process within the Hongyuan reduced porphyry Mo-Cu deposit, West Junggar, NW China.GEOLOGICAL JOURNAL,26. |
| MLA | Wu, Chu,et al."Ore-forming process within the Hongyuan reduced porphyry Mo-Cu deposit, West Junggar, NW China".GEOLOGICAL JOURNAL (2023):26. |
入库方式： OAI收割
来源：地质与地球物理研究所
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