Mineralization of the Lianhuashan Sn-polymetallic deposits associated with dynamic metamorphism: Constraints from cassiterite geochemistry and U-Pb geochronology
文献类型：期刊论文
| 作者 | Wang, Jun3,4,5; Wang, Liming3; Yan, Shuang5; Ma, Yong2; Xu, Diankui1 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2023 |
| 卷号 | 66期号:7页码:1664-1677 |
| 关键词 | MC-ICP-MS EASTERN GUANGDONG TIN MINERALIZATION SOUTH CHINA AGE TUNGSTEN PROVINCE COMPLEX HF GRANITE |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-022-1060-8 |
| 英文摘要 | The Lianhuashan metallogenic belt in Eastern Guangdong Province (South China) is the most important Sn polymetallic district in the region, hosting many medium-sized deposits such as the Tashan, Xianshuili, and Jiangxikeng. However, the metallogenic mechanism of these deposits remains hotly debated. In this paper, two types of cassiterites (Cst1 and Cst2) have been identified in the Xianshuili and Jiangxikeng Sn deposits, which are hosted in the biotite-mylonite and garnet-cordierite-muscovite blastomylonite, respectively. The euhedral Cst1 (0.50–1.8 mm) coexists with biotite, feldspar, and quartz. It is platy and zoned with a mosaic structure. The subhedral to anhedral Cst2 (0.02–0.35 mm) coexists with metamorphic minerals such as garnet and cordierite, and it is characterized by well-developed porosity and has no zonation. In-situ U-Pb dating of the Cst1 and Cst2 yielded ages of 149.5±1.0 Ma (MSWD=1.6, n=45) and 125.1±2.3 Ma (MSWD=4.5, n=43), respectively. Cst1 is most likely to be related to the intermediate-felsic magmatism that formed Gaojiping Group, whereas Cst2 has relatively high Ta, Nb, Fe, and W contents with obvious rare earth tetragroup effect, and may have formed by the late Early Cretaceous dynamic metamorphism. Results presented here, when combined with regional geology and geochemistry, led us to suggest that the Mesozoic intermediate-felsic volcanic rocks in the LMB are significantly enriched in Sn and F, with high Sn-polymetallic mineralization potential which likely have contributed to the volcanic-related Cst1. In the late Early Cretaceous period, due to the NW-dipping subduction of the paleo-Pacific plate, the intermediate-felsic volcanic rocks underwent dynamic metamorphism that led to Sn mobilization, migration, and precipitation in the regional ductile shear zones, and eventually generating Sn mineralization. We propose that areas beneath Xianshuili and Jiangxikeng have great potential for discovery of new Sn resources. Our findings likely offer practical importance to regional geological ore prospecting. ? 2023, Science China Press. |
| WOS研究方向 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:001016116000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80198]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 作者单位 | 1.Nonferrous Metal Geological Bureau of Guangdong Province 931 Battalion, Shantou; 515041, China 2.Nonferrous Geological Exploration Institute of Guangdong Province, Guangzhou; 510080, China 3.Geology Bureau for Nonferrous Metal of Guangdong Province, Guangzhou; 510080, China 4.University of Chinese Academy of Sciences, Beijing; 100049, China 5.CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China |
| 推荐引用方式 GB/T 7714 | Wang, Jun,Wang, Liming,Yan, Shuang,et al. Mineralization of the Lianhuashan Sn-polymetallic deposits associated with dynamic metamorphism: Constraints from cassiterite geochemistry and U-Pb geochronology[J]. SCIENCE CHINA-EARTH SCIENCES,2023,66(7):1664-1677. |
| APA | Wang, Jun,Wang, Liming,Yan, Shuang,Ma, Yong,&Xu, Diankui.(2023).Mineralization of the Lianhuashan Sn-polymetallic deposits associated with dynamic metamorphism: Constraints from cassiterite geochemistry and U-Pb geochronology.SCIENCE CHINA-EARTH SCIENCES,66(7),1664-1677. |
| MLA | Wang, Jun,et al."Mineralization of the Lianhuashan Sn-polymetallic deposits associated with dynamic metamorphism: Constraints from cassiterite geochemistry and U-Pb geochronology".SCIENCE CHINA-EARTH SCIENCES 66.7(2023):1664-1677. |
入库方式： OAI收割
来源：广州地球化学研究所
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