Pre-Variscan tectonic setting of the south margin of Armorica: Insights from detrital zircon ages distribution and Hf isotopic composition of the S-t-Georges-sur-Loire Unit (S. Armorican Massif, France)
文献类型：期刊论文
| 作者 | Lin, Wei1,3; Faure, Michel2; Li, Xian-Hua1,3; Ji, Wenbin4 |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2019-09-05 |
| 卷号 | 766页码:340-378 |
| 关键词 | U-Pb-Hf of detrital zircons Provenance Cadomian belt Variscan belt Armorica microcontinent |
| ISSN号 | 0040-1951 |
| DOI | 10.1016/j.tecto.2019.06.015 |
| 英文摘要 | The Armorican Massif experienced a poly-orogenic evolution, represented by the Neoproterozoic Cadomian and the Devonian-Carboniferous Variscan tectonothermal events. In the southernmost part of the Armorican Domain (or Armorica microcontinent), the S-t-Georges-sur-Loire Unit consists of a block-in-matrix subunit, and a turbiditic subunit in the South and North, respectively. The S-t-Georges-sur Loire unit is interpreted as a remnant back-arc basin formed in Silurian-Early Devonian (ca. 440-400 Ma), and was deformed during the Variscan orogeny. Most of the sedimentary and magmatic blocks enclosed in clastic matrix are olistoliths derived from an assumed southern area called the "missing domain", presently exposed as the Variscan Mauges Nappe composed of the Cadomian rocks and Early Paleozoic sedimentary cover. The "missing domain" was subducted beneath the Armorican massif during the Variscan collision. Detrital zircon age spectra from sandstones and siltstones from the olistostrome matrix reveal Neoproterozoic and Early Paleozoic age clusters, and less abundant Paleoproterozoic and Archean ages. Hf isotopic compositions of detrital zircons indicate dominantly negative epsilon(Hf) (t) values which are in agreement with a recycled continental source. Minor positive values correspond to a juvenile component that was formed during the Neoproterozoic Cadomian orogeny or Archean-Paleoproterozoic events. The Cambrian and Early Ordovician ages can be related to the pre-Variscan rifting of the Pannotia megacontinent that separated the Armorica microcontinent from Gondwana. Neoproterozoic ages imply a source of the magmatic rocks exposed in the Cadomian belt of the northern part of the Armorica microcontinent, and in the Mauges Nappe. |
| WOS关键词 | U-PB SYSTEMS ; BOHEMIAN MASSIF ; RHEIC OCEAN ; RB-SR ; BELT ; PROVENANCE ; EVOLUTION ; GONDWANA ; BRITTANY ; CONSTRAINTS |
| 资助项目 | National Natural Science Foundation of China[91855212] ; National Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[41472193] ; National Key R&D Program of China[2016YFC0600401] ; National Key R&D Program of China[2016YFC0600102] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000488141100023 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93694]  |
| 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 | Lin, Wei |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Orleans, ISTO, UMR 7327, F-45071 Orleans 2, France 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, 229 Taibai Northern Rd, Xian 710069, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Wei,Faure, Michel,Li, Xian-Hua,et al. Pre-Variscan tectonic setting of the south margin of Armorica: Insights from detrital zircon ages distribution and Hf isotopic composition of the S-t-Georges-sur-Loire Unit (S. Armorican Massif, France)[J]. TECTONOPHYSICS,2019,766:340-378. |
| APA | Lin, Wei,Faure, Michel,Li, Xian-Hua,&Ji, Wenbin.(2019).Pre-Variscan tectonic setting of the south margin of Armorica: Insights from detrital zircon ages distribution and Hf isotopic composition of the S-t-Georges-sur-Loire Unit (S. Armorican Massif, France).TECTONOPHYSICS,766,340-378. |
| MLA | Lin, Wei,et al."Pre-Variscan tectonic setting of the south margin of Armorica: Insights from detrital zircon ages distribution and Hf isotopic composition of the S-t-Georges-sur-Loire Unit (S. Armorican Massif, France)".TECTONOPHYSICS 766(2019):340-378. |
入库方式： OAI收割
来源：地质与地球物理研究所
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