Petrogenesis of Miocene high Ba-Sr granitoids from the Central Pamir: Implications for continental growth
文献类型：期刊论文
| 作者 | Liu, Zheng1,4; Liu, Hao1,4; Yan, Qing-He1,4; Wang, He2,3; Tan, Shu-Cheng1,4 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2024 |
| 卷号 | 259页码:15 |
| 关键词 | High Ba -Sr granitoids Lithospheric mantle Underthrusted continental crust Miocene Central Pamir |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2023.105924 |
| 英文摘要 | High Ba-Sr granitoids differ from the I-, Sand A-type granitoids, and their petrogenesis and role in the evolution of the continental crust remain enigmatic. This paper reports a study of whole-rock geochemistry, and Sr-Nd isotopes, zircon U-Pb geochronology, and Lu-Hf isotopes of the Zankan high Ba-Sr intrusion in the Central Pamir. U-Pb dating of zircons suggests that the pluton was emplaced during the Miocene (10.2 +/- 0.1 Ma). The Zankan rocks have high contents of K2O (3.83 to 12.3 wt%), Rb (212-483 ppm), Ba (701-6910 ppm), and Sr (503-3371 ppm). They have several geochemical characteristics that are consistent with A-type granitoids, such as high Na2O + K2O (8.10-14.2 wt%) and Zr + Nb + Ce + Y (336-1393 ppm) contents. All samples have enriched Sr-Nd-Hf isotope compositions, with 87Sr/86Sri = 0.7097 to 0.7126, epsilon Nd(T) = -9.3 to -8.4, and epsilon Hf(T) = -12.2 to -4.0. Their isotopic compositions differ from those of mafic lower crust in the Central Pamir. Alternatively, the Zankan rocks may have been derived from an enriched lithospheric mantle. Combining our new isotopic results with data from the literature, we propose that a shift from isotopically juvenile to more isotopically evolved compositions in mantle-derived magmas took place from the Eocene to Miocene. The isotopic shift reveals that South Pamir lower crust was underthrusted beneath the Central Pamir lithosphere during the Miocene. Although high Ba-Sr granitoids generally exhibit "crust-like" isotopic characteristics, our data indicate that they play a role in continental growth. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001163368400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76316]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Yan, Qing-He |
| 作者单位 | 1.Yunnan Univ, Sch Earth Sci, Kunming 650091, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.Yunnan Int Joint Lab Crit Mineral Resource, Kunming 650500, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zheng,Liu, Hao,Yan, Qing-He,et al. Petrogenesis of Miocene high Ba-Sr granitoids from the Central Pamir: Implications for continental growth[J]. JOURNAL OF ASIAN EARTH SCIENCES,2024,259:15. |
| APA | Liu, Zheng,Liu, Hao,Yan, Qing-He,Wang, He,&Tan, Shu-Cheng.(2024).Petrogenesis of Miocene high Ba-Sr granitoids from the Central Pamir: Implications for continental growth.JOURNAL OF ASIAN EARTH SCIENCES,259,15. |
| MLA | Liu, Zheng,et al."Petrogenesis of Miocene high Ba-Sr granitoids from the Central Pamir: Implications for continental growth".JOURNAL OF ASIAN EARTH SCIENCES 259(2024):15. |
入库方式： OAI收割
来源：广州地球化学研究所
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