Synsedimentary broken-foreland tectonics during the Paleogene in the Andes of NW Argentine
- 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 ofUnravelling 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.…
Author details: | Carolina Montero-LopezORCiD, Cecilia del Papa, Fernando D. HongnORCiD, Manfred StreckerORCiDGND, Alejandro Aramayo |
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DOI: | https://doi.org/10.1111/bre.12212 |
ISSN: | 0950-091X |
ISSN: | 1365-2117 |
Title of parent work (English): | Basin research |
Subtitle (English): | new evidence from regional to centimetre-scale deformation features |
Publisher: | Wiley |
Place of publishing: | Hoboken |
Publication type: | Review |
Language: | English |
Date of first publication: | 2018/01/14 |
Publication year: | 2018 |
Release date: | 2022/02/04 |
Volume: | 30 |
Number of pages: | 18 |
First page: | 142 |
Last Page: | 159 |
Funding institution: | FONCyT-ANPCyTANPCyTFONCyT [PICT-0407]; CONICET (Argentina)Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP 489] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Peer review: | Referiert |