Neogene variations in slab geometry drive topographic change and drainage reorganization in the Northern Andes of Colombia

Pérez-Consuegra, N.; Ott, Richard F.; Hoke, Gregory D.; Galvé, Jorge Pedro; Pérez-Peña, Jose Vicente; Mora, Andrés

doi:10.1016/j.gloplacha.2021.103641

Cited by 12 publications

(22 citation statements)

References 88 publications

(127 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An area with lower inferred erosion rates near the crest of the CC has recently been linked to glacial planation based on the close correlation between the extent of this area and the altitude of moraines (Fig. 6) (Pérez-Consuegra et al, 2021b). This highlights that the interpretation of inferred erosion rate maps should be limited to regions where fluvial erosion is the dominant erosion process on the time-scale of landscape adjustment.…”

Section: Tectonic Implications Of the Erosion Rate Mapmentioning

confidence: 86%

“…2). The concavity optimization was performed on the southern CC where stream-profiles are near equilibrium (Pérez-Consuegra et al, 2021b) to avoid a biased concavity estimate from transient profiles in the northern CC. This yielded a 𝜃 𝑟𝑒𝑓 = 0.5 (Fig.…”

Section: 𝒌 𝒔𝒏 Calculation and Regression Methodsmentioning

confidence: 99%

“…Villagómez et al, 2011b). Several Cenozoic periods of rapid exhumation have been inferred, however it remains debated if the northern CC rose to high elevations (> 2000 m) by about 25 Ma (Restrepo-Moreno et al, 2019) or only within the past 5 Ma due to recent slab flattening (Pérez-Consuegra et al, 2021b). For the EC, pollen and some thermochronological studies suggest strong surface uplift and exhumation since the Late Miocene (e.g., Hooghiemstra et al, 2006;Anderson et al, 2016), while other evidence suggests mountain building commenced by or before the Oligocene (Gómez et al, 2003;Horton et al, 2010).…”

Section: Study Areamentioning

confidence: 99%

“…The two main mountain ranges of the Northern Andes, the Central Cordillera (CC) and the Eastern Cordillera (EC), are composed of dominantly crystalline basement rocks and clastic sedimentary rocks, respectively (Gomez and Montes, 2020) and experience significant spatial variability in precipitation (Urrea et al, 2019). Observed topographic disequilibrium has led to suggestions of pronounced spatial and temporal variations in rock uplift (Struth et al, 2017;Pérez-Consuegra et al, 2021b), but the relationship between subduction processes and inherited structures on the evolution of topography remain debated (Pérez-Consuegra et al, 2021a, 2021b. We propose that erosion rate maps could help to elucidate patterns of rock uplift through space and, if coupled with landscape evolution model predictions, through time, which can then be used to differentiate between tectonic and geodynamic models for the CC and EC.…”

Section: Introductionmentioning

confidence: 99%

“…-Consuegra et al, (2021b) ascribe this acceleration in surface uplift to dynamic uplift due to Late Miocene/Pliocene slab flattening. South of the slab tear, erosion rates in the CC are substantially higher and less variable compared to the northern CC (Figs.6, 7B,E).…”

mentioning

confidence: 97%

See 4 more Smart Citations

Erosion rate maps highlight spatio-temporal patterns of uplift and quantify sediment export of the Northern Andes

Ott¹,

Perez-Cosnuegra²,

Scherler³

et al. 2023

Preprint

View full text Add to dashboard Cite

Erosion rates are widely used to assess tectonic uplift and sediment export from mountain ranges. However, the scarcity of erosion rate measurements often hinders detailed tectonic interpretations. Here, we present 25 new cosmogenic nuclide-derived erosion rates from the Northern Andes of Colombia to study spatio-temporal patterns of uplift along the Central and Eastern Cordillera. Specifically, we combine our new and published erosion rate data with precipitation-corrected normalized channel steepness measurements for building high-resolution erosion rate maps. We find that erosion rates in the southern Central Cordillera are relatively uniform and average ~0.3 mm/a, whereas rapidly eroding canyons dissect slowly eroding, low-relief surfaces in the northern Central Cordillera. We interpret that long-term, steep slab subduction has led to an erosional steady-state in the southern Cordillera Central, whereas in the northern Cordillera Central, Late Miocene slab flattening caused an acceleration in uplift, to which the landscape has not yet equilibrated. The Eastern Cordillera also displays pronounced erosional disequilibrium, with a slowly eroding central plateau rimmed by faster eroding western and eastern flanks. Our maps suggest recent topographic growth of the Eastern Cordillera, with deformation focused along the eastern flank, which is also supported by balanced cross-sections and thermochronologic data. Spatial gradients in predicted erosion rates along the eastern flank of the Eastern Cordillera suggest transient basin-ward migration of thrusts. Finally, using our erosion maps to infer millennial-scale sediment fluxes, we find that the Eastern Cordillera exports nearly four times more sediment than the Central Cordillera. Our analysis shows that accounting for spatial variations in erosion parameters and climate gradients reveals important variations in tectonic forcing that would otherwise be obscured in traditional river profile analyses. Moreover, given relationships between tectonic, and topographic evolution, we hypothesize that the dynamic landscape evolution of the Northern Andes revealed by our erosion maps is mostly linked to spatio-temporal variations in slab dip with potentially superposed effects from inherited Mesozoic rift structures.

show abstract

Section: Tectonic Implications Of the Erosion Rate Mapmentioning

confidence: 86%

Section: 𝒌 𝒔𝒏 Calculation and Regression Methodsmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 97%

See 3 more Smart Citations

Erosion rate maps highlight spatio-temporal patterns of uplift and quantify sediment export of the Northern Andes

Ott¹,

Perez-Cosnuegra²,

Scherler³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Fracture evaluation of the plutonic basement in the Upper Magdalena Basin: Implications for the development of naturally fractured reservoirs in the Northern Andes

Rodríguez‐Cuevas,

Cardona,

Monsalve

et al. 2024

Geological Journal

View full text Add to dashboard Cite

Plutonic rocks typically have negligible matrix porosity and permeability. However, fractures and mineral alterations create storage space and flow pathways that turn plutonic rocks into fluid reservoirs. Despite significant hydrocarbon discoveries, naturally fractured reservoirs in plutonic rocks have been poorly studied. In most Colombian basins, the crystalline basement has undergone multiple deformational events and is thrust over the Cretaceous to Cenozoic source and reservoir rocks of the conventional petroleum system. This structural configuration is ideal for the migration of oil into a fractured basement. A multiscale fracture analysis, including field, petrographical and petrophysical techniques was conducted on the Permian and Jurassic plutonic basement of Upper Magdalena Basin in order to understand the controls on brittle deformation, the development of fracture networks and their potential to form hydrocarbon reservoirs. The results indicate that protolith textures and structures, including magmatic and mylonitic foliation, favours fracturing. Dykes exhibit higher fracture density (7–48 fractures/m), porosity (mean = 0.4%) and permeability (mean = 125,818.75 mD) than the host rock (2–25 fractures/m; 0.23%; 12,066.09 mD). Intersection zones from regional faults, are characterized by the highest fracture and lineament intensity. Our results suggest that dyke swarms and interacting damage zones can significantly enhance the reservoir quality of plutonic rocks by providing storage in fractures and fluid pathways to the host rock.

show abstract

The present-day tectonic regimes of the Colombian Andes and the role of slab geometry in intraplate seismicity

García-Delgado

Velandia

Bermúdez

et al. 2022

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

Neogene variations in slab geometry drive topographic change and drainage reorganization in the Northern Andes of Colombia

Cited by 12 publications

References 88 publications

Erosion rate maps highlight spatio-temporal patterns of uplift and quantify sediment export of the Northern Andes

Erosion rate maps highlight spatio-temporal patterns of uplift and quantify sediment export of the Northern Andes

Fracture evaluation of the plutonic basement in the Upper Magdalena Basin: Implications for the development of naturally fractured reservoirs in the Northern Andes

The present-day tectonic regimes of the Colombian Andes and the role of slab geometry in intraplate seismicity

Contact Info

Product

Resources

About