IGGCAS OpenIR  > 岩石圈演化国家重点实验室
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)
Lin, Wei1,3; Faure, Michel2; Li, Xian-Hua1,3; Ji, Wenbin4
2019-09-05
Source PublicationTECTONOPHYSICS
ISSN0040-1951
Volume766Pages:340-378
AbstractThe 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.
KeywordU-Pb-Hf of detrital zircons Provenance Cadomian belt Variscan belt Armorica microcontinent
DOI10.1016/j.tecto.2019.06.015
Funding OrganizationNational 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
WOS KeywordU-PB SYSTEMS ; BOHEMIAN MASSIF ; RHEIC OCEAN ; RB-SR ; BELT ; PROVENANCE ; EVOLUTION ; GONDWANA ; BRITTANY ; CONSTRAINTS
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000488141100023
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93694
Collection岩石圈演化国家重点实验室
Corresponding AuthorLin, Wei
Affiliation1.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
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lin, Wei]'s Articles
[Faure, Michel]'s Articles
[Li, Xian-Hua]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lin, Wei]'s Articles
[Faure, Michel]'s Articles
[Li, Xian-Hua]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lin, Wei]'s Articles
[Faure, Michel]'s Articles
[Li, Xian-Hua]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.