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Full-Text Articles in Earth Sciences
Evolution Of The Stress And Strain Fields In The Eastern Cordillera, Colombia, Obi Egbue, James N. Kellogg
Evolution Of The Stress And Strain Fields In The Eastern Cordillera, Colombia, Obi Egbue, James N. Kellogg
James N Kellogg
This work integrates stress data from Global Positioning System measurements and earthquake focal mechanism solutions, with new borehole breakout and natural fracture system data to better understand the complex interactions between the major tectonic plates in northwestern South America and to examine how the stress regime in the Eastern Cordillera and the Llanos foothills in Colombia has evolved through time. The dataset was used to generate an integrated stress map of the northern Andes and to propose a model for stress evolution in the Eastern Cordillera. In the Cordillera, the primary present-day maximum principal stress direction is WNW-ESE to NW-SE, …
Three-Dimensional Structural Evolution And Kinematics Of The Piedemonte Llanero, Central Llanos Foothills, Eastern Cordillera, Colombia, Obi Egbue, James N. Kellogg
Three-Dimensional Structural Evolution And Kinematics Of The Piedemonte Llanero, Central Llanos Foothills, Eastern Cordillera, Colombia, Obi Egbue, James N. Kellogg
James N Kellogg
The Piedemonte Llanero is a wedge duplex zone in the Llanos foothills on the eastern flank of the Eastern Cordillera of Colombia. It is located northeast of the Cusiana and Cupiagua hydrocarbon fields. The area is characterized by a series of moderate to high-angle duplexes with east-southeast verging thin-skinned and thick-skinned tectonics.We present a structural model constrained by 2-D and 3-D seismic reflection data, surface geology, and well data. The structural analysis is based on backward modeling (kinematic restoration) and forward modeling using transfer-flexural slip and fault slip fold algorithms. The structures are significantly tighter in the northern segment compared …