Petrogenesis of the Late Oligocene Takht batholith, Southeastern Iran: Implications for the Diachronous Nature of the Arabia-Eurasia Collision
文献类型：期刊论文
| 作者 | Pang, Kwan-Nang2; Fazlnia, Abdolnaser3; Ji, Wei-Qiang4; Jamei, Susan3,5; Jafari, Amin1,3 |
| 刊名 | FRONTIERS IN EARTH SCIENCE
 |
| 出版日期 | 2020-08-21 |
| 卷号 | 8页码:18 |
| 关键词 | granitoids geochemistry Urumieh-Dokhtar Arabia Eurasia Neotethys |
| DOI | 10.3389/feart.2020.00354 |
| 英文摘要 | Zircon U-Pb age, mineral compositional, elemental and Sr-Nd isotopic data are documented for intermediate to felsic rocks in the Takht batholith, a Late Oligocene igneous complex in the southeastern segment of the Urumieh-Dokhtar belt, Iran, to investigate magma genesis in the context of regional tectonics. A large part of the magmatic belt formed by northward subduction of the Neotethys before the Arabia-Eurasia continental collision. Zircon U-Pb age data indicate the batholith crystallized at similar to 25 Ma, an age consistent with previous results. Geochemical data indicate that the rocks share features typical of calc-alkaline magmas and I-type granitoids. The least evolved magma inferred from the data has basaltic andesite composition, consistent with either of the following origins: (i) a partial melt of the mantle followed by differentiation, or (ii) a partial melt of the lower crust. With increasing SiO2, (Sr-87/Sr-86)(25)(Ma)increases from 0.7053 to 0.7073, and epsilon Nd(25Ma)decreases from -0.3 to -2.9, consistent with increasing effects of assimilation-fractional crystallization, although processes such as magma mixing and melting of heterogeneous source rocks cannot be entirely ruled out. Aluminum-in-hornblende thermometry indicates that the batholith might have emplaced at similar to 6.5 km or shallower paleo-depths. Moho depth proxies Sr/Y and (La/Yb)(N)yield crustal thickness of similar to 20-30 km, showing no evidence for magma processing within thick crust. Overall, our results indicate that the Takht batholith is a Cordilleran-type batholith formed beneath a continental or transitional arc of normal crustal thickness. This is consistent with the notion that Arabia and Eurasia have collided in a diachronous manner, propagating from the northwest to the southeast since the Late Eocene-Early Oligocene. |
| WOS关键词 | ENERGY-CONSTRAINED ASSIMILATION ; DOKHTAR MAGMATIC BELT ; U-PB GEOCHRONOLOGY ; ARC-MAGMATISM ; EXPERIMENTAL CALIBRATION ; CHEMICAL-COMPOSITION ; TECTONIC EVOLUTION ; CRUSTAL THICKNESS ; TRACE-ELEMENT ; OROGENIC BELT |
| 资助项目 | Ministry of Science and Technology, Taiwan, China[105-2628-M-001-002-MY4] ; Academia Sinica[AS-CDA-109-M07] ; Urmia University (Iran) |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000568342700001 |
| 出版者 | FRONTIERS MEDIA SA |
| 资助机构 | Ministry of Science and Technology, Taiwan, China ; Ministry of Science and Technology, Taiwan, China ; Academia Sinica ; Academia Sinica ; Urmia University (Iran) ; Urmia University (Iran) ; Ministry of Science and Technology, Taiwan, China ; Ministry of Science and Technology, Taiwan, China ; Academia Sinica ; Academia Sinica ; Urmia University (Iran) ; Urmia University (Iran) ; Ministry of Science and Technology, Taiwan, China ; Ministry of Science and Technology, Taiwan, China ; Academia Sinica ; Academia Sinica ; Urmia University (Iran) ; Urmia University (Iran) ; Ministry of Science and Technology, Taiwan, China ; Ministry of Science and Technology, Taiwan, China ; Academia Sinica ; Academia Sinica ; Urmia University (Iran) ; Urmia University (Iran) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98221]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Pang, Kwan-Nang; Fazlnia, Abdolnaser |
| 作者单位 | 1.Univ Tabriz, Dept Geol, Fac Nat Sci, Tabriz, Iran 2.Acad Sinica, Inst Earth Sci, Taipei, Taiwan 3.Urmia Univ, Dept Geol, Orumiyeh, Iran 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 5.Shahid Beheshti Univ, Fac Earth Sci, Tehran, Iran |
| 推荐引用方式 GB/T 7714 | Pang, Kwan-Nang,Fazlnia, Abdolnaser,Ji, Wei-Qiang,et al. Petrogenesis of the Late Oligocene Takht batholith, Southeastern Iran: Implications for the Diachronous Nature of the Arabia-Eurasia Collision[J]. FRONTIERS IN EARTH SCIENCE,2020,8:18. |
| APA | Pang, Kwan-Nang,Fazlnia, Abdolnaser,Ji, Wei-Qiang,Jamei, Susan,&Jafari, Amin.(2020).Petrogenesis of the Late Oligocene Takht batholith, Southeastern Iran: Implications for the Diachronous Nature of the Arabia-Eurasia Collision.FRONTIERS IN EARTH SCIENCE,8,18. |
| MLA | Pang, Kwan-Nang,et al."Petrogenesis of the Late Oligocene Takht batholith, Southeastern Iran: Implications for the Diachronous Nature of the Arabia-Eurasia Collision".FRONTIERS IN EARTH SCIENCE 8(2020):18. |
入库方式： OAI收割
来源：地质与地球物理研究所
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