Magnetostratigraphy of the Kavaalani section (southwestern Turkey): Consequence for the origin of the Antalya calcareous nappes (Turkey) and for the Norian (Late Triassic) magnetic polarity timescale

Yves Gallet (1) , Jean Besse (1) , Leopold Krystyn , Jean Marcoux (2) , Jean Guex , Hervé Théveniaut (3)

1 IPGP (UMR_7154) - Institut de Physique du Globe de Paris
2 UPCité - Université Paris Cité
3 BRGM - Bureau de Recherches Géologiques et Minières

A magnetostratigraphic study of the Kavaalani section of uppermost Carnian to Upper Norian age, located in the Antalya Calcareous Nappes (southwestern Turkey), reveals nineteen polarity intervals. This pattern correlates very well with two other polarity sequences obtained from the same nappe system (Bolücektasi Tepe and Kavur Tepe) if these sections were deposited in the same (northern) hemisphere. This new interpretation changes our previous conclusions regarding the southern hemisphere origin of the magnetic remanence of the Kavur Tepe section. The paleomagnetic data obtained from the Kavur Tepe and the Kavaalani sections therefore reflect large (∼180°) internal rotations within the Antalya nappes. These nappes were likely formed close to the northern tip of the Arabian promontory. We propose a revised yet still preliminary version of the Norian magnetic polarity sequence.

Domaines: Planète et Univers [physics]

Yves Gallet, Jean Besse, Leopold Krystyn, Jean Marcoux, Jean Guex, et al.. Magnetostratigraphy of the Kavaalani section (southwestern Turkey): Consequence for the origin of the Antalya calcareous nappes (Turkey) and for the Norian (Late Triassic) magnetic polarity timescale. Geophysical Research Letters, 2000, 27, pp.2033-2036. ⟨10.1029/2000GL008504⟩. ⟨insu-03596938⟩