Abstract

CASTILLO-LOPEZ, Luis Antonio; GONZALEZ, John Fredy  and  DUITAMA, Alejandro. 2.5D Seismic tomography and geological features in the Urabá Basin (Colombia). Bol. geol. [online]. 2019, vol.41, n.3, pp.163-174.  Epub Sep 30, 2019. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v41n3-2019008.

There is little information and geological knowledge of the Urabá Basin. The results of the pseudo-3D (or 2.5D) tomographic study for the basin are presented. However, seismological data (passive seismic) allow an approximation of the disposition of some geological features in the subsurface, for example, guidelines and faults. Thus, by mean of the difference of travel times of the waves (P and S) that were recorded in the field and implementing a seismic inversion algorithm, a model was developed. This allowed estimating the seismic sources and the velocity distribution, also, to evaluate the disposition of the layers of rock in the subsurface until about 30 km of depth. With this, a contrast of velocity and a possible extension of the faults were identified, in the case of the Murindó fault to the north, and another fault with transverse orientation located in the Riosucio area.

Keywords : Urabá Basin; Faults; Seismic Tomography; 2.5D..

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