The doubly vergent inverted structures in the Mesozoic basins of northern Chile (28°S): A comparative analysis from field data and analogue modeling
Doubly vergent contractional structures are common features in many regions of the Central Andes. They represent the first-order structural style observed in the inverted Mesozoic basins located along the flat-slab subduction segment of northern Chile. Here, we present a comparative analyses based o...
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2017
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| 003 | AR-BaUEN | ||
| 005 | 20250211090420.0 | ||
| 008 | 190410s2017 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85015261718 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Martínez, F. | |
| 245 | 1 | 4 | |a The doubly vergent inverted structures in the Mesozoic basins of northern Chile (28°S): A comparative analysis from field data and analogue modeling |
| 260 | |b Elsevier Ltd |c 2017 | ||
| 270 | 1 | 0 | |m Martínez, F.; Departamento de Geología, Universidad Católica del NorteChile; email: martinezfjh@hotmail.com |
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| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a Doubly vergent contractional structures are common features in many regions of the Central Andes. They represent the first-order structural style observed in the inverted Mesozoic basins located along the flat-slab subduction segment of northern Chile. Here, we present a comparative analyses based on geological data previously published and a series of analogue models that were applied to understand the geometry and kinematics of doubly vergent structures related to tectonic inversion, similar to those exposed along the Chanarcillo and Lautaro basins located in northern Chile at 28°S. Our experiments consisted of orthogonal shortening of sand–microbead mixture models located over two pre-existing antithetic master normal faults separated by a structural high to reproduce their tectonic inversion. During the tests, we evaluated the influence of the distance between the master normal faults and synorogenic sedimentation on the final configuration of the doubly vergent structures. The results showed that: a) the tectonic inversion of antithetic normal faults separated by structural highs geometrically reproduce the doubly vergent structures confined to the edge of the Chañarcillo and Lautaro basins. This pre-shortening initial configuration is required to create doubly vergent systems composed of opposite-dipping inverted faults; b) the initial separation distance between the antithetic normal faults strongly influenced the final configuration of the doubly vergent structures during their tectonic inversion. Narrow separations can produce more complex tectonic scenarios; c) the synorogenic sedimentation between the inverted faults can modify the final geometry of the doubly vergent inverted structures, since it allows the shortening to be preferentially accumulated by inversion anticlines. Finally we conclude that although these results can be comparable with the main structures present in the Mesozoic inverted basins of northern Chile, some geological features associated with thin-skinned deformation between the inverted faults remain speculative, because this situation could be more complex and we recommend taking our findings only as a first geological approximation. © 2017 Elsevier Ltd |l eng | |
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires | ||
| 536 | |a Detalles de la financiación: Fondo Nacional de Desarrollo Científico y Tecnológico, FONDECYT, 3140557 | ||
| 536 | |a Detalles de la financiación: This work was funded by the Fondo Nacional de Desarrollo Cient?fico y Tecnol?gico (FONDECYT), Chile, grants 3140557 ?Crustal structure and deformation timing along the Chilean flat-slab subduction segment (27?-29?S), Central Andes?. We thanks to special support of the Laboratory of Geological Modeling of the University of Buenos Aires (LAMOGE). The authors also acknowledge the valuable discussions with the Dr. C?sar Arriagada and the constructive suggestions made by F. Hongn and an anonymous reviewer. | ||
| 593 | |a Departamento de Geología, Universidad Católica del Norte, Angamos, Antofagasta 0610, Chile | ||
| 593 | |a Laboratorio de Modelado Geológico (LaMoGe), Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina | ||
| 651 | 4 | |a CHILE | |
| 690 | 1 | 0 | |a DOUBLY VERGENT STRUCTURES |
| 690 | 1 | 0 | |a INVERSION ANTICLINES |
| 690 | 1 | 0 | |a NORTHERN CHILE |
| 690 | 1 | 0 | |a STRUCTURAL HIGHS |
| 690 | 1 | 0 | |a ANALOG MODEL |
| 690 | 1 | 0 | |a ANTICLINE |
| 690 | 1 | 0 | |a COMPARATIVE STUDY |
| 690 | 1 | 0 | |a DEFORMATION |
| 690 | 1 | 0 | |a INVERSION TECTONICS |
| 690 | 1 | 0 | |a MESOZOIC |
| 690 | 1 | 0 | |a NORMAL FAULT |
| 700 | 1 | |a Cristallini, Ernesto Osvaldo | |
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