Crustal structure of eastern Cuba,derived by constrained 3D gravity inversion |
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| Institution: | Centro Nacional de Investigaciones Sismológicas Calle 17 No. 61, Rpto. Vista Alegre Santiago de Cuba, Cuba;Centro de Investigación Científica y de Educación Superior de Ensenada Applied Geophysics Department Carr. Ensenada-Tijuana, 3918 Zona Playitas, Ensenada Baja California, México;Centro de Investigación Científica y de Educación Superior de Ensenada Applied Geophysics Department Carr. Ensenada-Tijuana, 3918 Zona Playitas, Ensenada Baja California, México;Universidad Autónoma de Coahuila Escuela Superior de Ingeniería. Blvd. Adolfo López Mateos 26800 Nueva Rosita Coahuila, México |
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| Abstract: | A three-dimensional crustal model for Eastern Cuba, obtained through a process of gravity data inversion is presented. The study area cover a rectangular area of 64 600 km2. The initial model for the inversion was constrained by surface geology, seismic and drilling data. The inversion algorithm uses gravity data to estimate 3-D topographies from the main geological units. The model provides quantitative information on the depths and thicknesses of the geological formations. The resulting model provides new information about the regional composition of the crust. Alien sequences are observed with different compositions and origin over the basement of Bahamas carbonate platform. Most of the maximum gravity anomalies are associated with presence of dense shallow ophiolite sheets. The most remarkable detail is the gravity “southwest” maximum, related to the presence of denser oceanic crust generated in the Cayman spreading center. |
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| Keywords: | corteza inversión gravedad ofiolitas acreción Eastern Cuba crustal structure constrained inversion gravity ophiolites accretion |
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