Deep Structure of the Grenada Basin From Wide-Angle Seismic, Bathymetric and Gravity Data

摘要

The Grenada back-arc basin is located between the Aves Ridge, which hosted the remnant Early Paleogene "Great Caribbean Arc," and the Eocene to Present Lesser Antilles Arc. Several earlier studies have proposed different modes of back-arc opening for this basin, including N-S and E-W directions. The main aim of this study is to constrain the circumstances leading to the opening of the basin. Three combined wide-angle and reflection seismic profiles were acquired in the Grenada basin. The final velocity models from forward travel time and gravity modeling image variations in thickness and velocity structure of the sedimentary and crustal layers.