Fractal Dimension and Seismotectonic Deformation Rates along an Inter-plate Setting: Seismic Regime along the Caribbean Plate Boundary Zone
Juan M. Salazar, Carlos A. Vargas, 2015. "Fractal Dimension and Seismotectonic Deformation Rates along an Inter-plate Setting: Seismic Regime along the Caribbean Plate Boundary Zone", Petroleum Geology and Potential of the Colombian Caribbean Margin, Claudio Bartolini, Paul Mann
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We have analyzed a catalog compiled by the USGS for the period 1977–2014 of approximately 33.1 seismic events (Mw ≥ 3.0) and 2.3 focal mechanisms (Mw ≥ 4.9) located in the Caribbean plate, with depths ranging between 0 km and 200 km (124.2 mi). Data allowed calculation of the spatial variations of the seismic regime (the b-values based on the Gutenberg–Richter power law, and the fractal dimension or D-parameter) and the seismotectonic deformation rates. We find a strong depth dependence of the b-values and the D-parameter as well as a depth interval (40–80 m [24.8–49.7 mi]) with large mean deformation rates (2.0±0.49 cm/yr) that has been associated with the subduction process along the Caribbean plate. Finally, we suggest that the southern border of the Caribbean plate starts near the central segment of the Nazca Cocos Spreading Center (3.5°N–83°W); trends eastward along the Sandra ridge, the Caldas Tear; and then follows the eastern foothills of the northern Andes.
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AAPG Memoir 108 is the first international book published on the petroleum geology and hydrocarbon potential of Colombia’s Caribbean Margin. Tis volume consists of 27 multidisciplinary papers that include a wide range of geological and geophysical topics, such as geochemistry and petroleum systems, earthquake seismology and tomography, seismic stratigraphy and sedimentology, oil and gas exploration plays, carbonate and siliciclastic petrology, basement studies, regional tectonics and structural geology, fold belt structural analyses, potential methods, and studies of deep-sea sedimentation on the Magdalena fan. This highly valuable and innovative piece of information is critical for geoscientists in the petroleum industry, research institutions, and academia. Do not miss the opportunity to learn about the extremely complex but fascinating geology of Colombia's Caribbean Margin and its important hydrocarbon potential.