Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Han, Jinsheng1; Chen, Huayong2 ; Xu, Haijun3; Nadeau, Olivier4; Xu, Chang3
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| Identifying xenocrystic tourmaline in Himalayan leucogranites | |
| Source Publication | AMERICAN MINERALOGIST
 |
| ISSN | 0003-004X |
| 2023-07-26 | |
| Volume | 108Issue:7Pages:1289-1297 |
| DOI | 10.2138/am-2022-8615 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics ; Mineralogy |
| Abstract | 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. |
| Keyword | Autocrystic and xenocrystic tourmaline boron isotopes Cuonadong leucogranites electron backscattered diffraction analyses Himalayan granites |
| WOS ID | WOS:001030344300009 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74554 |
| Collection | 中国科学院矿物学与成矿学重点实验室 |
| Corresponding Author | Chen, Huayong |
| Affiliation | 1.CUGW, China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, 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 |
| Recommended Citation 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. |
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