TY  - JOUR
A1  - Montero-Lopez, Carolina
A1  - del Papa, Cecilia
A1  - Hongn, Fernando D.
A1  - Strecker, Manfred
A1  - Aramayo, Alejandro
T1  - Synsedimentary broken-foreland tectonics during the Paleogene in the Andes of NW Argentine
BT  - new evidence from regional to centimetre-scale deformation features
JF  - Basin research
N2  - Unravelling the spatiotemporal evolution of the Cenozoic Andean (Altiplano-Puna) plateau has been one of the most intriguing problems of South American geology. Despite a number of investigations, the early deformation and uplift history of this area remained largely enigmatic. This paper analyses the Paleogene tectono-sedimentary history of the Casa Grande Basin, in the present-day transition zone between the northern sector of the Puna Plateau and the northern part of the Argentine Eastern Cordillera. Our detailed mapping of synsedimentary structures records the onset of regional contractional deformation during the middle Eocene, revealing reactivation of Cretaceous extensional structures and the development of doubly vergent thrusts. This is in agreement with records from other southern parts of the Puna Plateau and the Eastern Cordillera. These observations indicate the existence of an Eocene broken foreland setting within the region, characterized by low-lying compressional basins and ranges with spatially disparate sectors of deformation, which was subsequently subjected to regional uplift resulting in the attainment of present-day elevations during the Neogene.
Y1  - 2018
U6  - https://doi.org/10.1111/bre.12212
SN  - 0950-091X
SN  - 1365-2117
VL  - 30
SP  - 142
EP  - 159
PB  - Wiley
CY  - Hoboken
ER  -