Boron and Molybdenum Isotope Evidence for Source-Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya
文献类型：期刊论文
| 作者 | Fan, Jing-Jing3; Wang, Qiang1,3,4; Wei, Gang-Jian1,3; Li, Jie1,3 ; Ma, Lin1,3; Zhang, Xiu-Zheng1,3; Jiang, Zi-Qi2; Ma, Jin-Long1,3; Zhou, Jin-Sheng1,3; Li, Qi-Wei5
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| 刊名 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
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| 出版日期 | 2023-06-01 |
| 卷号 | 24期号:6页码:21 |
| 关键词 | granites B-Mo isotopes source diversity fluid effect himalayan orogen |
| DOI | 10.1029/2022GC010629 |
| 英文摘要 | The origins of Cenozoic granites in the Himalaya are key to understanding the evolution of the Himalayan orogen. However, it is unclear whether these granites represent primary melts, and the nature of their magma source is controversial. Here, we present a systematic element and Sr-Nd-B-Mo isotope study of Cenozoic granites from the Yardoi area in the eastern Tethyan Himalaya, China. These granites can be divided into two groups: mid-Eocene porphyritic two-mica granites with low SiO2 contents (65.9-69.6 wt.%) and adakitic geochemical signatures, and mid-Eocene to Miocene equigranular granites with high SiO2 contents (71.6-75.5 wt.%). The high-SiO(2 )granites (HSG) have similar Sr-Nd isotope compositions to the low-SiO(2 )granites (LSG), but they have distinct d(11)B values of -19.4%o to -11.4%o and -10.6%o to -6.89%o. This indicates that the two groups have different sources, with the LSG derived by partial melting dominantly of metamafic rocks at thickened lower crustal conditions, and the HSG generated by partial melting of the mid-crust metasedimentary rocks with less enriched Nd isotope compositions. The d(98/95)Mo of the LSG and HSG are highly variable with values of -0.68%o to 0.12%o and -1.13%o to 0.46%o, respectively. d(11)B values of the HSG correlate positively with d98/95Mo and Sr/Y values and correlate negatively with K2O, Rb, Zr, and Rb/ Sr, reflecting the addition of external metamorphic fluids during anatexis of the metapelites. The B-Mo isotope data robustly suggest source-controlled compositional diversity of the Himalayan granites, which could provide clues to the physical and geochemical responses during the evolution of a large orogen. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001010633600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74368]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Wang, Qiang; Zhang, Xiu-Zheng |
| 作者单位 | 1.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 2.Guilin Univ Technol, Guilin, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 5.China Univ Geosci, Sch Earth Sci, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Jing-Jing,Wang, Qiang,Wei, Gang-Jian,et al. Boron and Molybdenum Isotope Evidence for Source-Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2023,24(6):21. |
| APA | Fan, Jing-Jing.,Wang, Qiang.,Wei, Gang-Jian.,Li, Jie.,Ma, Lin.,...&Zhang, Miao-Yan.(2023).Boron and Molybdenum Isotope Evidence for Source-Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,24(6),21. |
| MLA | Fan, Jing-Jing,et al."Boron and Molybdenum Isotope Evidence for Source-Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 24.6(2023):21. |
入库方式： OAI收割
来源：广州地球化学研究所
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