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Permian paleomagnetic result from the Western Pyrenees delineating the plate boundary between the Iberian Peninsula and stable Europe

1973; American Geophysical Union; Volume: 78; Issue: 23 Linguagem: Inglês

10.1029/jb078i023p05118

2156-2202

Rob Van der Voo, A. Boessenkool,

Geological and Geochemical Analysis

Journal of Geophysical Research (1896-1977)Volume 78, Issue 23 p. 5118-5127 Permian paleomagnetic result from the Western Pyrenees delineating the plate boundary between the Iberian Peninsula and stable Europe R. Van der Voo, R. Van der VooSearch for more papers by this authorA. Boessenkool, A. BoessenkoolSearch for more papers by this author R. Van der Voo, R. Van der VooSearch for more papers by this authorA. Boessenkool, A. BoessenkoolSearch for more papers by this author First published: 10 August 1973 https://doi.org/10.1029/JB078i023p05118Citations: 42AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract The natural remanent magnetizations of Permian basaltic flows and Permian (?) dikes of the massifs of Cinco-Villas and La Rhune in the western Pyrenees have been studied. An unfolding test proves the characteristic magnetizations of the flows to be prefolding. From mainly thermal demagnetization analyses, a mean direction of magnetization has been calculated: D = 217.5°, I = −11.3°, k = 25°, and α95, = 7° for N = 17 sites (65 samples) and a virtual pole position at 40°N, 126°E. The characteristic directions of magnetization in the samples from the two dikes are conformable with those from the Permian flows. The paleodeclination of this result does not deviate in a counterclockwise sense from those from stable Europe, and it is concluded that this part of the Pyrenees was not rotated with the Iberian Peninsula. We have further delineated the fossil plate boundary between the Iberian Peninsula and stable Europe. The hypothesis of the evolution of the Bay of Biscay in two or more distinct stages is supported: the initial stage or stages imply a counterclockwise rotation of the Iberian Peninsula in Late Jurassic-Cretaceous times; later, a compressional Early Tertiary stage occurred during which the Iberian Peninsula moved northward with respect to stable Europe, thereby creating the Pyrenean orogen and its western continuation in the southern margin of the Bay of Biscay. References Argand, E., La Tectonique de l'Asie, Proceedings of the thirteenth International Geological Congress, 171–372, Brussels, 1924. Bullard, E. C., J. Everett, A. G. Smith, A symposium on continental drift, 4, The fit of the continents around the Atlantic, Phil. Trans. Roy. Soc. London, Ser. A, 258, 41–51, 1965. Carey, S. 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