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Abstract

AAPG Bulletin, V. 99, No. 8 (August 2015), PP. 15571573

Copyright copy2015. The American Association of Petroleum Geologists. All rights reserved.

DOI: 10.1306/07071411112

FetKin: Coupling kinematic restorations and temperature to predict thrusting, exhumation histories, and thermochronometric ages

Ariel Almendral,1 Wilmer Robles,2 Mauricio Parra,3 Andrés Mora,4 Richard A. Ketcham,5 and Michael Raghib6

1Instituto Colombiano del Petróleo, Piedecuesta, Santander, Colombia; present address: Norsk Regnesentral/Norwegian Computing Center, P.O. Box 114, Blindern, NO-0314 Oslo, Norway; [email protected]; [email protected]
2Instituto Colombiano del Petróleo, Piedecuesta, Santander, Colombia; [email protected]
3Instituto Colombiano del Petróleo, Piedecuesta, Santander, Colombia; Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78759; [email protected]
4Instituto Colombiano del Petróleo, Piedecuesta, Santander, Colombia; [email protected]
5Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78759; [email protected]
6Instituto Colombiano del Petróleo, Piedecuesta, Santander, Colombia; [email protected]

ABSTRACT

FetKin is a C++ program for forward modeling thermochronological ages on a two-dimensional geological cross section. Modeled ages for various thermochronometers are computed from time–temperature histories that result from coupling the modeled kinematics of deformation obtained from commercial software for balanced reconstructions (2DMove) and a finite element computation of temperatures. Additional capabilities include the ability to accommodate (1) a smooth change of topological relief; (2) the influence of variation in rock physical properties; and (3) multikinetic modeling of fission-track ages and length distributions, as well as apatite and zircon (U-Th)/He and muscovite BLTN11112eq1 systems. A joint first-order analysis of the impact of erosion parameters and material properties improves age predictions and allows for a more complete analysis of observed cooling ages based on their modeled thermal histories. Thus, this paper presents a new software tool that has been developed as a basic support for the methodological approach used to build the kinematic restorations shown in this volume, which are the basic input for petroleum systems modeling and prediction in the Colombian Eastern Cordillera and Llanos foothills basin.

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