Basin Development and Tectonic History of the Llanos Basin, Colombia

Fluid Inclusions and Rare Earth Elements (REE) analysis in calcite veins: Tectonic - diagenesis interaction in the Rosablanca formation, Mesa de los Santos sector, eastern cordillera, Colombia

“…Mesa de Los Santos sector) is regionally framed within the tectonic evolution of the Middle Magdalena Valley basin and the Eastern Cordillera, especially the latter because it forms part of it. Taking into account that proposed by Mojica & Franco [13], Cooper et al [17] and Sarmiento [18], in the Late Triassic -Upper Cretaceous interval, distensive tectonics prevailed in which an intracontinental rift was formed, bordered by normal paleo-faults, with subsidence due to the block tectonics [19] that allowed the accumulation of the continental sediments relating to the Bocas, Girón, Jordán and Los Santos formations.…”

“…Geo-tectonically, in the Middle Magdalena Valley and the Eastern Cordillera, until the Lower Cretaceous the distension was associated with an intracontinental rifting phase related globally with the separation of Gondwana and Laurasia, and the opening of the Paleo-Caribbean ocean [17,18]. In the Upper Cretaceous, this phase evolved into a retroarc basin in which the distension extended and reached its maximum extent with the deposition of La Luna Formation [20], and ended at the conclusion of the Cretaceous.…”

“…Taking into account the above, one could consider that, in the Mesa de Los Santos sector, the diagenesis processes (through to the formation of granular aggregates (Figure 7) occurred when the unit was deposited locally and buried under a dominant distensive geotectonic context during the Cretaceous, not only in Mesa de Los Santos, but also in the Middle Magdalena Valley and in the Eastern Cordillera where this unit is also located [17,18].…”

Cenozoic exhumation patterns in the northern Andes: Constraints from the southern Bucaramanga Fault, Eastern Cordillera, Colombia

“…The axial zone of the Eastern Cordillera of Colombia is characterized by regional faults such as the Soapaga, Boyacá and the southern termination of the Bucaramanga master fault, along which crystalline basement outcrops in the Santander and Floresta massifs. The Cordillera comprises a Mesozoic basin, which was inverted tectonically during the Cenozoic (Fabre, 1983;Colletta et al, 1990;Dengo and Covey, 1993;Cooper et al, 1995;Sarmiento, 2001;Toro et al, 2004;Sarmiento-Rojas et al, 2006;Tesón et al, 2013). The boundary between the Santander and Floresta massifs is not clearly defined, so the whole area is generally considered as uplifted Mesozoic basement known as the "Santander High".…”

“…To the south, tectonic inversion of the Santander High occurred mainly along the Boyacá and Soapaga faults (Cooper et al, 1995;Sarmiento, 2001;Toro et al, 2004;Tesón et al, 2013); whereas to the north, the inversion has been described along the La Salina and Suárez faults (Sarmiento, 2001;Tesón et al, 2013;Caballero et al, 2013). During the J o u r n a l P r e -p r o o f Andean orogeny, Cenozoic reactivation of the Bucaramanga, Río Servitá and Baraya faults, located at the center and to the east of the current Santander Massif was significant (Kammer, 1993;Corredor, 2003;Forero-Ortega et al, 2020).…”