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- W2158032136 abstract "Abstract: The Palaeozoic Variscan orogeny was a large-scale collisional event that involved amalgamation of multiple continents and microcontinents. Previous palaeomagnetic and structural analyses of the western Variscan orogen, notably the Ibero-Armorican Arc, suggest that this region underwent oroclinal bending of an originally near-linear orogen during the latest stages of Variscan deformation in the late Palaeozoic. These analyses necessitate a two-stage tectonic history with east–west compression forming a linear belt in the Carboniferous, followed by a change in regional compression directions resulting in crustal block rotation and formation of the present-day arc. This study presents new palaeomagnetic analyses of Early Permian samples from the Sotres and Cabranes formations (41.3°N, 222.5°W, α 95 = 13.1°) in the northern inner limb and the Viar Basin (51.8°N, 199.2°W, α 95 = 6.7°) in the southern outer limb of the arc. Both locations yield expected Early Permian palaeomagnetic pole positions for stable Iberia, implying that measured magnetizations have undergone no significant vertical-axis rotation since acquisition, and thus were acquired subsequent to oroclinal bending. This new result places a time constraint of about 10 Ma for oroclinal bending of the Ibero-Armorican Arc, which agrees well with recent geodynamical models that relate oroclinal bending to lithospheric delamination in this region." @default.
- W2158032136 created "2016-06-24" @default.
- W2158032136 creator A5020384168 @default.
- W2158032136 creator A5060067477 @default.
- W2158032136 creator A5061278757 @default.
- W2158032136 date "2010-01-01" @default.
- W2158032136 modified "2023-10-17" @default.
- W2158032136 title "New time constraints on lithospheric-scale oroclinal bending of the Ibero-Armorican Arc: a palaeomagnetic study of earliest Permian rocks from Iberia" @default.
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