Paleomagnetism of Permo-Triassic and Cretaceous rocks from the Antofagasta region, northern Chile. (December 2015)

• Record Type: Journal Article
• Authors: Narea, K.; Peña, M.; Bascuñán, S.; Becerra, J.; Gómez, I.; Deckart, K.; Munizaga, F.; Maksaev, V.; Arriagada, C.; Roperch, P.
• Is Part Of: Journal of South American earth sciences. Volume 64:Part 2(2015:Dec.)
• Page Start: 261
• Page End: 272
• Publication Date: 2015-12
• Subjects: Paleomagnetism -- Central Andes -- Northern Chile -- Tectonics -- Permo-Triassic -- Antofagasta region; Geology -- Latin America -- Periodicals; Earth sciences -- Latin America -- Periodicals; Geology -- Antarctica -- Periodicals; Earth sciences -- Antarctica -- Periodicals; Geology -- Caribbean Area -- Periodicals; Earth sciences -- Caribbean Area -- Periodicals; Géologie -- Amérique latine -- Périodiques; Sciences de la terre -- Amérique latine -- Périodiques; Géologie -- Antarctique -- Périodiques; Sciences de la terre -- Antarctique -- Périodiques; Géologie -- Caraïbes (Région) -- Périodiques; Sciences de la terre -- Caraïbes (Région) -- Périodiques; Earth sciences; Geology; Antarctica; Caribbean Area; Latin America; Periodicals; 550.5
• DOI: 10.1016/j.jsames.2015.09.008
• Languages: English
• ISSNs: 0895-9811

Abstract

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. Highlights: Paleomagnetism of Permo-Triassic and Cretaceous rocks. Tectonics of northern Chile. Clockwise vertical-axis rotations.