Abstract

BARRERA-CHAPARRO, Lady Alejandra  and  BERMUDEZ-CELLA, Mauricio Alberto. Discrimination of the climate, relief, and tectonic relationship in a sector of the Eastern Basin, Eastern Cordillera of Colombia through geomorphology and quantitative thermochronology. Bol. geol. [online]. 2024, vol.46, n.3, pp.127-146.  Epub Nov 28, 2024. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v46n3-2024005.

At the Colombian Eastern Cordillera, we focused on the Arcabuco Anticline, which is an asymmetric fold with a core of Jurassic sedimentary rocks. The region considered includes the active reverse faults of Soapaga and Boyacá, the activity of these faults, the geomorphological evolution and its relationship with the current erosion of this area have been little studied. By applying quantitative geomorphology, the relationship between climate, relief, and tectonics, as well as the possible coupling of these processes, was distinguished. For this purpose, the study incorporated data on precipitation, relief, hypsometric integral (HI), steepness index, seismicity, and thermochronological. Using statistical comparison of the different calculated variables, it is concluded that tectonic activity, primarily resulting from the interaction of the Boyacá and Soapaga faults, is determining the shaping of the current relief. Additionally, the geomorphometric analysis allowed for the discrimination of basins at different evolutionary stages. The Chicamocha Basin is in a senile stage (HI=0.27), while the Huertas, Pómeca, and Tolotá Basins are in mature stages (HI=0.34, HI=0.44, HI=0.31, respectively).

Keywords : Precipitation; Boyacá Fault; Soapaga Fault; Seismicity; Long-term erosion.

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