Identifying xenocrystic tourmaline in Himalayan leucogranites
文献类型：期刊论文
| 作者 | Han, Jinsheng2; Chen, Huayong1 ; Xu, Haijun3; Nadeau, Olivier4; Xu, Chang3
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| 刊名 | AMERICAN MINERALOGIST
 |
| 出版日期 | 2023-07-26 |
| 卷号 | 108期号:7页码:1289-1297 |
| 关键词 | Autocrystic and xenocrystic tourmaline boron isotopes Cuonadong leucogranites electron backscattered diffraction analyses Himalayan granites |
| ISSN号 | 0003-004X |
| DOI | 10.2138/am-2022-8615 |
| 英文摘要 | Tourmaline is a common autocrystic mineral in granitic and pegmatitic rocks that records valuable information on the physicochemical evolution of magmas. However, xenocrystic tourmaline that does not crystallize from host magmas is also common but seldom reported and notoriously difficult to identify. Here, autocrystic (Tur G) and xenocrystic (Tur P) tourmalines are identified in two-mica granites and granitic pegmatites from the Cuonadong leucogranites, eastern Himalaya. Electron backscatter diffraction (EBSD), coupled with electron-probe micro-analysis (EPMA) and laser ablation ICP-MS analyses (LA-ICP-MS), is used to discriminate xenocrystic from autocrystic tourmaline. Although both tourmalines have slightly different chemical compositions, the differences are insufficient to permit unambiguous discrimination. However, EBSD systematically shows complex intra-crystalline orientations and deformation xenocrystic grains, and undeformed crystal lattices are predominant in autocrystic grains. EBSD could be a useful tool to identify the origin of tourmaline in granitic rocks, particularly when geochemical analyses and/or geochronological measurements are inconclusive. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001030344300009 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74553]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Chen, Huayong |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 2.CUGW, China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 3.CUGW, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 4.CUGW, Sch Earth Sci, Dept Mineral Resources & Engn, Lab Isotopes Econ Geol & Environm LIEGE, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Jinsheng,Chen, Huayong,Xu, Haijun,et al. Identifying xenocrystic tourmaline in Himalayan leucogranites[J]. AMERICAN MINERALOGIST,2023,108(7):1289-1297. |
| APA | Han, Jinsheng,Chen, Huayong,Xu, Haijun,Nadeau, Olivier,&Xu, Chang.(2023).Identifying xenocrystic tourmaline in Himalayan leucogranites.AMERICAN MINERALOGIST,108(7),1289-1297. |
| MLA | Han, Jinsheng,et al."Identifying xenocrystic tourmaline in Himalayan leucogranites".AMERICAN MINERALOGIST 108.7(2023):1289-1297. |
入库方式： OAI收割
来源：广州地球化学研究所
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