Author:
Auvray Bernard,Charlot René,Vidal Philippe
Abstract
Orthogneisses from the Tregor area of the North Armorican Massif have been dated using the U/Pb method on zircons. Ages of between 1.8 and 2.0 Ga have been obtained, thus significantly extending the known size of the Lower Proterozoic basement in this area. It is argued that the presence of such a substantial area of basement is a further argument for an Upper Proterozoic (Brioverian) south-dipping subduction zone which was located to the north of the Armorican Massif. On the other hand, the similarities between the North Armorican block and the northern margin of the West African craton during the Proterozoic are emphasized.
Publisher
Canadian Science Publishing
Subject
General Earth and Planetary Sciences
Cited by
74 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. The provenance of Avalonia and its tectonic implications: a critical reappraisal;Geological Society, London, Special Publications;2023-03-28
2. Evolution of a Holocene banner bank controlled by morphodynamics and structural setting of a macrotidal coast: Saint-Brieuc Bay (NW-Europe);Geoscience Frontiers;2021-09
3. Status of Basement Terranes in Orogens: Insights From the Cadomian Domain of the North Armorican Variscides, Western France;Tectonics;2021-05
4. Provenance of Ediacaran-Ordovician sediments of the Medio Armorican Domain, Brittany, West France: Constraints from U/Pb detrital zircon and Sm–Nd isotope data;Gondwana Research;2021-02
5. The Stavelot-Venn Massif (Ardenne, Belgium), a rift shoulder basin ripped off the West African craton: Cartography, stratigraphy, sedimentology, new U-Pb on zircon ages, geochemistry and Nd isotopes evidence;Earth-Science Reviews;2020-04