In situ major and trace elements of garnet and scheelite in the Nuri Cu-W-Mo deposit, South Gangdese, Tibet: Implications for mineral genesis and ore-forming fluid records
文献类型：期刊论文
| 作者 | Chen, Lei1,2; Qin, Kezhang1; Li, Guangming1; Li, Jinxiang1; Xiao, Bo1; Zhao, Junxing1 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2020-07-01 |
| 卷号 | 122页码:16 |
| 关键词 | Garnet Scheelite In situ elemental analysis Mineral genesis Ore-forming fluid records |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2020.103549 |
| 英文摘要 | Garnet and scheelite are common hydrothermal silicate mineral and metal mineral in skarn or porphyry-skarn deposits, and can aid in constraining the composition of ore-forming fluid. Based on in situ major and trace element analyses of garnet and scheelite from the Nuri Cu-W-Mo deposit, we discuss the factors and mechanisms controlling the incorporation of rare earth elements (REEs) into the garnet and scheelite, and investigate the associated hydrothermal fluid characteristics. The garnets from the Nuri deposit belong to the grossular-andradite (grandite) solid solution series and range in composition from Adr(64)Grs(34) to Adr(91)Grs(8). The REE patterns of garnet are enriched in light rare earth elements (LREEs) and depleted in heavy rare earth elements (HREEs). The REEs characteristics indicates that the incorporation of REEs into the Nuri garnet was controlled by the surface adsorption and element substitution in the mineral structure. Based on the cathodoluminescence (CL) images of scheelite, two growth stages (early and late stages) are identified. These two stages of scheelite belong to the scheelite-powellite series, and are enriched in LREEs and depleted in HREEs. However, the early scheelite exhibits negative or no Eu anomalies (0.34-0.95), whereas the late scheelite presents positive Eu anomalies (1.25-2.89). The Mo content in the early scheelite is positively correlated with the delta Eu value, while the Mo content in the late scheelite is negatively correlated with delta Eu. These characteristics indicate that the redox state of the ore-forming fluid gradually changed from the oxidized state to the reduced state. The preferred REE3+ substitution for Ca2+ in the Nuri scheelite is 3Ca(2+) = 2REE(3+) + [ ]Ca (where [ ]Ca is a Ca site vacancy). The REE features of the scheelite are mainly controlled by the REE nature of the ore-forming fluid. According to the characteristics of trace elements in garnet and scheelite, we suggest that the ore-forming fluid of the Nuri deposit is a magmatic fluid mixed with a slightly acidic external fluid. Chloride complexes may be the main transport ligand of the REEs, and the oxygen fugacity of the ore-forming fluid gradually decreased. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; ARCHEAN GOLD DEPOSITS ; EFFECTIVE IONIC-RADII ; LA-ICP-MS ; SM-ND ; HYDROTHERMAL SYSTEMS ; SKARN DEPOSITS ; PARTITION-COEFFICIENTS ; AQUEOUS-SOLUTIONS ; ROCK INTERACTION |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0806] ; China Metallurgical Geology Bureau ; [NSFC4120205641872092] |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000537805900004 |
| 出版者 | ELSEVIER |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau ; China Metallurgical Geology Bureau |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/96640]  |
| 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 | Chen, Lei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Lei,Qin, Kezhang,Li, Guangming,et al. In situ major and trace elements of garnet and scheelite in the Nuri Cu-W-Mo deposit, South Gangdese, Tibet: Implications for mineral genesis and ore-forming fluid records[J]. ORE GEOLOGY REVIEWS,2020,122:16. |
| APA | Chen, Lei,Qin, Kezhang,Li, Guangming,Li, Jinxiang,Xiao, Bo,&Zhao, Junxing.(2020).In situ major and trace elements of garnet and scheelite in the Nuri Cu-W-Mo deposit, South Gangdese, Tibet: Implications for mineral genesis and ore-forming fluid records.ORE GEOLOGY REVIEWS,122,16. |
| MLA | Chen, Lei,et al."In situ major and trace elements of garnet and scheelite in the Nuri Cu-W-Mo deposit, South Gangdese, Tibet: Implications for mineral genesis and ore-forming fluid records".ORE GEOLOGY REVIEWS 122(2020):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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