Cenozoic paleogeography of the Andean foreland and retroarc hinterland of Colombia
Reyes-Harker, Andrés Ruiz-Valdivieso, Carlos Fernando Mora, Andrés Ramírez-Arias, Juan Carlos Rodriguez, Guillermo Parra, Felipe de la Caballero, Victor Parra, Mauricio Moreno, Nestor Horton, Brian K. Saylor, Joel E. Silva, Alejandro Valencia, Victor Stockli, Daniel Blanco, Vladimir
Cenozoic paleogeography of the Andean foreland and retroarc hinterland of Colombia - ago. 2015 - 46 p. ; 1407-1453
Transcripción del resumen del autor: New biostratigraphic zonations, core descriptions, sandstone petrography, facies analysis, and seismic information are compared with published detrital and bedrock geo- and thermochronology to build a Previous HitCenozoicNext Hit paleogeographic reconstruction of the Previous HitAndeanNext Hit Previous HitretroarcNext Hit region of Previous HitColombiaNext Hit, encompassing the ancestral Central Cordillera, Middle Magdalena Valley, Eastern Cordillera, and Llanos basin. We identify uplifted sediment source areas, provenance domains, depositional environments, and thickness changes to propose a refined paleogeographic evolution of eastern Previous HitColombiaNext Hit. We conclude that Previous HitCenozoicNext Hit evolution of the northernmost Andes includes (1) a period of contractional deformation focused in the Central Cordillera and Middle Magdalena Valley that may have started by the Late Cretaceous, although thermochronological data points to maximum shortening and exhumation during the late Paleocene; (2) a period of slower deformation rates or even tectonic quiescence during the middle Eocene; and (3) a renewed phase of contractional deformation from the late Eocene to the Pleistocene/Holocene expressed in provenance, bedrock thermochronology, and increased subsidence rates in the Llanos Previous HitforelandNext Hit. The sedimentary response in the Llanos Previous HitforelandNext Hit basin is controlled by source area proximity, exhumation and shortening rates, relationships between accommodation and sediment supply, as well as potential paleoclimate forcing. This new reconstruction changes the picture of Previous HitCenozoicTop basin evolution offered by previous reconstructions, providing an updated chronology of deformation, which is tied to a more precise understanding of basin evolution.
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Cenozoic paleogeography of the Andean foreland and retroarc hinterland of Colombia - ago. 2015 - 46 p. ; 1407-1453
Transcripción del resumen del autor: New biostratigraphic zonations, core descriptions, sandstone petrography, facies analysis, and seismic information are compared with published detrital and bedrock geo- and thermochronology to build a Previous HitCenozoicNext Hit paleogeographic reconstruction of the Previous HitAndeanNext Hit Previous HitretroarcNext Hit region of Previous HitColombiaNext Hit, encompassing the ancestral Central Cordillera, Middle Magdalena Valley, Eastern Cordillera, and Llanos basin. We identify uplifted sediment source areas, provenance domains, depositional environments, and thickness changes to propose a refined paleogeographic evolution of eastern Previous HitColombiaNext Hit. We conclude that Previous HitCenozoicNext Hit evolution of the northernmost Andes includes (1) a period of contractional deformation focused in the Central Cordillera and Middle Magdalena Valley that may have started by the Late Cretaceous, although thermochronological data points to maximum shortening and exhumation during the late Paleocene; (2) a period of slower deformation rates or even tectonic quiescence during the middle Eocene; and (3) a renewed phase of contractional deformation from the late Eocene to the Pleistocene/Holocene expressed in provenance, bedrock thermochronology, and increased subsidence rates in the Llanos Previous HitforelandNext Hit. The sedimentary response in the Llanos Previous HitforelandNext Hit basin is controlled by source area proximity, exhumation and shortening rates, relationships between accommodation and sediment supply, as well as potential paleoclimate forcing. This new reconstruction changes the picture of Previous HitCenozoicTop basin evolution offered by previous reconstructions, providing an updated chronology of deformation, which is tied to a more precise understanding of basin evolution.
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