文献类型：期刊文献

英文题名：Neoproterozoic W–Sn mineralization in the western Jiangnan Orogen, South China: Insights from the Fanjingshan S-type granites

作者：Luo, Jin-Cheng Zhang, Jiawei Shu, Xujie Tang, Yanwen Dai, Yaran Liu, Weipeng Chen, Xiaocui Zhang, Tingting

第一作者：Luo, Jin-Cheng

机构：[1] State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; [2] Guizhou Geological Survey, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Guiyang, 550081, China; [3] College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China; [4] School of Geographic Science, Nantong University, Nantong, 226019, China; [5] School of Resources and Environmental Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China

通信机构：Guizhou Geological Survey, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Guiyang, 550081, China

年份：2025

卷号：270

外文期刊名：Journal of Geochemical Exploration

收录：EI(收录号：20245117557765);Scopus(收录号：2-s2.0-85212326290)

语种：英文

外文关键词：Apatite - Biostratigraphy - Calcium alloys - Descaling - Europium alloys - Fault slips - Geochronology - Hafnium alloys - Iron ores - Lead alloys - Manganese nodules - Membrane fouling - Mica - Mica deposits - Quartz - Sodium alloys - Tin alloys

摘要：The Jiangnan Orogen boasts abundant Neoproterozoic granitoids alongside locally significant W–Sn mineralization in South China. However, the factors governing the relationships between granites and the W–Sn mineralization remain elusive. Notably, Neoproterozoic W–Sn mineralization locally occurred within the western margin of the Jiangnan Orogen, encompassing important deposits like the Jiumao and Baotan deposits. The W-Sn-bearing tourmaline muscovite (Taoshulin) granite intruded into Neoproterozoic Fanjingshan Group, comprising low-degree metamorphosed sedimentary rocks that locally contain granitic gravel (two-mica granite). These granites in this study have high SiO2 (73.6–77.4 wt%), Al2O3 (12.8–15.1 wt%), Na2O (3.16–5.25 wt%) and high A/CNK values (1.28–1.47), which display co-variation trends. They have extremely low rare earth element (REE) concentrations (Hf(t) values (+0.9 to ?8.0), corresponding to two-stage Hf model ages of 1.7 to 2.2 Ga, indicating their derivation from Paleoproterozoic metasedimentary basement rocks. It is noteworthy that the W-Sn-bearing granite has high tetrad effect (TE1,3 = 1.16–1.24) and very low Nb/Ta ratios (mostly ≤ 4) that may have resulted from magmatic-hydrothermal alteration. Moreover, the ca. 830 Ma W-Sn-bearing granite is characterized by a notable concentration of high F, distinctively negative Eu anomalies, and non-chondritic REE behavior in apatite. Hence, the W–Sn mineralization in the Fanjingshan region was probably constrained by various factors, including source materials, magmatic processes and magmatic-hydrothermal processes. Our findings highlight the pivotal role played by Neoproterozoic muscovite tourmaline granites as host for W–Sn mineralization in the Fanjingshan region. In summary, this study emphasizes the significance of the ca. 830 Ma highly differentiated S-type granites holding significant potential for the exploration of critical metals such as W, Sn, Nb, and Ta in the western part of the Jiangnan Orogen and in geologically analogous regions across the globe. ? 2024 Elsevier B.V.