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Paleomagnetism of Permo-Triassic and Cretaceous rocks from the Antofagasta region, northern Chile

Abstract : New paleomagnetic data from Permo-Triassic and Late Cretaceous rocks yield a consistent trend of vertical-axis-tectonic-rotations which are consistent with the Central Andean Rotation Pattern (CARP). However, three sites in the Tuina Formation and one site in the Purilactis Group record large rotations (80°). These mayor rotations are probably due to dextral-transpressive deformation occurring in close relation with the Incaic tectonic phase. Consequently, it is possible to infer that previous tectonic phases Peruvian and K-T would not have produced significant tectonic rotations in the area.
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https://hal-insu.archives-ouvertes.fr/insu-02440221
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Submitted on : Wednesday, January 15, 2020 - 9:48:59 AM
Last modification on : Sunday, November 15, 2020 - 8:26:01 PM

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K. Narea, M. Pena, S. Bascunan, J. Becerra, I. Gomez, et al.. Paleomagnetism of Permo-Triassic and Cretaceous rocks from the Antofagasta region, northern Chile. Journal of South American Earth Sciences, Elsevier, 2015, 64, pp.261-272. ⟨10.1016/j.jsames.2015.09.008⟩. ⟨insu-02440221⟩

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