Structural styles and evolution of the Colombian Eastern foothills Piedemonte triangle zone

Castro-Martínez, Jaime Alberto; Patino, Mario; Mora, Andrés; Martínez, Juan Pablo Arias; Tesón, Eliseo

doi:10.1016/b978-0-323-85175-6.00013-4

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…We consider that between late Eocene and late Oligocene time, flat‐slab subduction of the Farallon slab behind the triple junction is the most likely scenario (Figure 7a1). This is suggested by the fact that the deformation migrated toward the backarc region, with associated onset of inversion of rift structures in the Eastern Cordillera of Colombia (Table S1 in Supporting Information ) (e.g., De la Parra et al., 2015; E. A. Gómez et al., 2003; Martinez et al., 2022; Mora et al., 2010; Mora, Reyes‐Harker, et al., 2013; Mora, Blanco, et al., 2013; Parra et al., 2009; Rosero et al., 2022; Sánchez et al., 2012; Saylor et al., 2012), coinciding with a deformation phase in eastern Panama (Barat et al., 2014; Montes et al., 2012). This interpretation is additionally supported by the reduction in Farallon‐related magmatism activity throughout the late Eocene‐Oligocene on both the PCA and SA margins (Leal‐Mejía et al., 2019; Wegner et al., 2011).…”

Section: Discussionmentioning

confidence: 99%

Kinematics and Convergent Tectonics of the Northwestern South American Plate During the Cenozoic

González,

Oncken,

Faccenna

et al. 2023

Geochem Geophys Geosyst

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The interaction of the northern Nazca and southwestern Caribbean oceanic plates with northwestern South America (NWSA) and the collision of the Panama‐Choco arc (PCA) have significant implications on the evolution of the northern Andes. Based on a quantitative kinematic reconstruction of the Caribbean and Farallon/Farallon‐derived plates, we reconstructed the subducting geometries beneath NWSA and the PCA accretion to the continent. The persistent northeastward migration of the Caribbean plate relative to NWSA in Cenozoic time caused the continuous northward advance of the Farallon‐Caribbean plate boundary, which in turn resulted in its progressive concave trench bending against NWSA. The increasing complexity during the Paleogene included the onset of Caribbean shallow subduction, the PCA approaching the continent, and the forced shallow Farallon subduction that ended in the fragmentation of the Farallon Plate into the Nazca and Cocos plates and the Coiba and Malpelo microplates by the late Oligocene. The convergence tectonics after late Oligocene comprised the accretional process of the PCA to NWSA, which evolved from subduction erosion of the forearc to collisional tectonics by the middle Miocene, as well as changes of convergence angle and slab dip of the Farallon‐derived plates, and the attachment of the Coiba and Malpelo microplates to the Nazca plate around 9 Ma, resulting in a change of convergence directions. During the Pliocene, the Nazca slab broke at 5.5°N, shaping the modern configuration. Overall, the proposed reconstruction is supported by geophysical data and is well correlated with the magmatic and deformation history of the northern Andes.

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Section: Discussionmentioning

confidence: 99%

Kinematics and Convergent Tectonics of the Northwestern South American Plate During the Cenozoic

González,

Oncken,

Faccenna

et al. 2023

Geochem Geophys Geosyst

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“…It is interesting to note that a regional onset of inversion of rift structures in the Eastern Cordillera of Colombia, associated with an eastward migration of the deformation front toward the backarc region (Table S1) (eg. Gómez et al, 2003;Parra et al, 2009;Mora et al, 2010Saylor et al, 2012;Sánchez et al, 2012;De la Parra et al, 2015;Martínez et al, 2022;Rosero et al, 2022) could support an Oligocene episode of flat-slab subduction (Fig. 7d).…”

Section: Paleocene To Late Oligocene (65 -23ma)mentioning

confidence: 94%

Kinematics and Convergent Tectonics of the Northwestern South American Plate during the Cenozoic.

Afanador

Oncken

Faccenna

et al. 2022

Preprint

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The interaction of the northern Nazca and southwestern Caribbean oceanic plates with South America, and the collision of the Panama-Choco arc have significant implications on the evolution of the northern Andes. We integrate an alternative interpretation of the Nazca and Caribbean kinematics with the magmatic and deformation history in the region. The northeastward migration of the Caribbean plate caused a progressive change in the geometry of the subducting Farallon plate, causing flat-slab subduction throughout the late Eocene-late Oligocene, inhibition of magmatism and eastward migration of the Andean deformation. Meanwhile, the Paleocene-Eocene highly oblique convergence of the Caribbean plate against South America changed by the mid-Eocene, when the Caribbean plate began to migrate in an easterly direction. These events and the late Oligocene breakup of the Farallon plate, prompted a Miocene plate reorganization, with further plate fragmentation, changes in convergence obliquity, steepening of the subducting slabs and renewal of magmatism. This tectonics was complicated by the accretion of the Panama-Choco arc to South America, which was characterized by early Miocene subduction erosion of the forearc and trench advance, followed by breakoff of the subducting slab east of Panama and collisional tectonics from the middle Miocene. By 9 Ma the Coiba and Malpelo microplates were attached to the Nazca plate, resulting in an abrupt change in convergence directions, that correlates with the main pulse of Andean orogeny. During the late Pliocene, the Nazca slab broke, triggering the modern volcanism south of 5.5º N. Seismicity data and tomography support the proposed reconstruction.

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Integrated geological and geophysical workflow for structural modelling: a case study from the contractional foothills zone of the Colombian Eastern Cordillera

Becerra-Bayona,

Mora

2024

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In fold-and-thrust belts where there is a high degree of structural complexity, artificial geometrical distortions are often present on seismic reflection profiles. They need to be minimized during modelling. We document a workflow in which depth-mapping, velocity model building, well calibration and cross-section balancing are integrated into the seismic interpretation process to generate trustworthy structural models in complex zones. The proposed methodology is exemplified by a case study from the foothills zone of the Colombian Eastern Cordillera. In addition, sequential kinematic restoration of the modelled structure allowed evaluation of hydrocarbon migration routes during the period between the Oligocene and the middle Miocene. Following the previously mentioned workflow, we document a failed exploratory case study where all elements of the petroleum system are present except the trap. In this context, the documented case is a typical velocity pull-up. From this and published case studies we conclude that in Andean settings and probably most on land contractional-foothill settings, seismic image only, does not provide enough evidence of the presence of the trap but additional surface geological signatures must be documented. The proposed workflow therefore appears to be a useful tool for evaluating the exploration risk in structurally-complex fold-and-thrust belt settings.

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Structural styles and evolution of the Colombian Eastern foothills Piedemonte triangle zone

Cited by 4 publications

References 11 publications

Kinematics and Convergent Tectonics of the Northwestern South American Plate During the Cenozoic

Kinematics and Convergent Tectonics of the Northwestern South American Plate During the Cenozoic

Kinematics and Convergent Tectonics of the Northwestern South American Plate during the Cenozoic.

Integrated geological and geophysical workflow for structural modelling: a case study from the contractional foothills zone of the Colombian Eastern Cordillera

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