Neoproterozoic magmatic flare-up along the N. margin of Gondwana: The Taknar complex, NE Iran
文献类型：期刊论文
| 作者 | Moghadam, Hadi Shafaii1,2,3; Li, Xian-Hua4; Santos, Jose F.5; Stern, Robert J.6; Griffin, William L.2,3; Ghorbani, Ghasem1; Sarebani, Nazila1 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2017-09-15 |
| 卷号 | 474页码:83-96 |
| 关键词 | Cadomian magmatism U-Pb zircon geochronology magmatic flare-up active continental magmatism Gondwana |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2017.06.028 |
| 文献子类 | Article |
| 英文摘要 | Magmatic "flare-ups" are common in continental arcs. The best-studied examples of such flare-ups are from Cretaceous and younger continental arcs, but a more ancient example is preserved in Late Ediacaran-Cambrian or Cadomian arcs that formed along the northern margin of Gondwana. In this paper, we report new trace-element, isotopic and geochronological data on similar to 550 Ma magmatic rocks from the Taknar complex, NE Iran, and use this information to better understand episodes of flare-up, crustal thickening and magmatic periodicity in the Cadomian arcs of Iran and Anatolia. Igneous rocks in the Taknar complex include gabbros, diorites, and granitoids, which grade upward into a sequence of metamorphosed volcano-sedimentary rocks with interlayered rhyolites. Granodioritic dikes crosscut the Taknar gabbros and diorites. Gabbros are the oldest units and have zircon U-Pb ages of ca 556 Ma. Granites are younger and have U-Pb zircon ages of ca 552-547 Ma. Rhyolites are coeval with the granites, with U-Pb zircon ages of alpha 551 Ma. Granodioritic dikes show two U-Pb zircon ages; ca 531 and 548 Ma. Geochemically, the Taknar igneous rocks have calc-alkaline signatures typical of continental arcs. Whole rock Nd and zircon O-Hf isotopic data show that from Taknar igneous rocks were generated via mixing of juvenile magmas with older continental crust components at an active continental margin. Compiled geochronological and geochemical data from Iran and Anatolia allow identification of a Cadomian flare-up along northern Gondwana. The compiled U-Pb results from both magmatic and detrital zircons indicate the flare-up started similar to 572 Ma and ended similar to 528 Ma. The Cadomian flare-up was linked to strong crustal extension above a S-dipping subduction zone beneath northern Gondwana. The Iran-Anatolian Cadomian arc represents a site of crustal differentiation and stratification and involved older (Archean?) continental lower-middle crust, which has yet to be identified in situ, to form the continental nuclei of Anatolia and Iran. The Cadomian crust of Anatolia and Iran formed a single block "Cimmeria" that rifted away from northern Gondwana and was accreted to southern Eurasia in late Paleozoic time. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | RHEIC OCEAN ; PB-HF ; ZIRCON GEOCHRONOLOGY ; GRANITIC-ROCKS ; IBERIAN MASSIF ; LATE EDIACARAN ; ACTIVE MARGIN ; ARABIAN PLATE ; OSSA-MORENA ; CONSTRAINTS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000409150600011 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Chinese Academy of Sciences(XDB18000000 ; FCT (Portugal)(UID/GEO/04035/2013) ; 2015VEC063) ; Chinese Academy of Sciences(XDB18000000 ; FCT (Portugal)(UID/GEO/04035/2013) ; 2015VEC063) ; Chinese Academy of Sciences(XDB18000000 ; FCT (Portugal)(UID/GEO/04035/2013) ; 2015VEC063) ; Chinese Academy of Sciences(XDB18000000 ; FCT (Portugal)(UID/GEO/04035/2013) ; 2015VEC063) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61888]  |
| 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 | Moghadam, Hadi Shafaii |
| 作者单位 | 1.Damghan Univ, Sch Earth Sci, Damghan 3671641167, Iran 2.Macquarie Univ, Dept Earth & Planetary Sci, ARC Ctr Excellence Core Crust Fluid Syst, Sydney, NSW 2109, Australia 3.Macquarie Univ, Dept Earth & Planetary Sci, GEMOC ARC Natl Key Ctr, Sydney, NSW 2109, Australia 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Univ Aveiro, Dept Geociencias, Geobiotec, P-3810193 Aveiro, Portugal 6.Univ Texas Dallas, Geosci Dept, Richardson, TX 75083 USA |
| 推荐引用方式 GB/T 7714 | Moghadam, Hadi Shafaii,Li, Xian-Hua,Santos, Jose F.,et al. Neoproterozoic magmatic flare-up along the N. margin of Gondwana: The Taknar complex, NE Iran[J]. EARTH AND PLANETARY SCIENCE LETTERS,2017,474:83-96. |
| APA | Moghadam, Hadi Shafaii.,Li, Xian-Hua.,Santos, Jose F..,Stern, Robert J..,Griffin, William L..,...&Sarebani, Nazila.(2017).Neoproterozoic magmatic flare-up along the N. margin of Gondwana: The Taknar complex, NE Iran.EARTH AND PLANETARY SCIENCE LETTERS,474,83-96. |
| MLA | Moghadam, Hadi Shafaii,et al."Neoproterozoic magmatic flare-up along the N. margin of Gondwana: The Taknar complex, NE Iran".EARTH AND PLANETARY SCIENCE LETTERS 474(2017):83-96. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。