Seismic Images of the Crustal Structure Beneath Cordillera Central and Cordillera Oriental, Dominican Republic
Description:
Hispaniola Island is a tectonic collage produced by the oblique convergence between the Caribbean and North American plates. The west to the central part of the island consists of high topography bounded by dominantly reverse and oblique-slip faults along the edges of the uplifted mountain ranges. The eastern part is lower in elevation, and no important active faults are identified. In this work, we analyzed the seismic data corresponding to Profiles A and D of the CARIBE NORTE project (2009) in the frame of the current KUK ÀHPÁN and MICROSIS-I projects. These profiles were registered by a seismic array of vertical and three-component land stations along N-S and W-E seismic transects of 425 and 450 km, respectively. The seismic sources used in these lines corresponded to land borehole explosions 1 Ton (S1, S2, and S3), three marine shooting lines (LM1N, LM1S for Profile A and LM4, for Profile D), and one earthquake that occurred during the registering period.
We constrained the seismic structure of the Dominican Republic by the inversion of wide-angle seismic travel-time data for the previous 2D P-wave velocity model of both profiles. The results show marked differences between the western and eastern regions of the island. In the eastern zone, the Moho discontinuity rises to 24 km deep, while it increases towards the island's interior with a maximum depth value of approximately 30 km deep in the west and central part of the transect. The analysis and relocation of an earthquake occurred on April 11, 2009, using the CARIBE NORTE temporary seismic network, allowed obtaining a structure dipping towards the eastern interior of the island with a dip angle of 18º reaching 120 km.
Session: Subduction Zone Structure From Trench to Arc [Poster]
Type: Poster
Date: 4/19/2023
Presentation Time: 08:00 AM (local time)
Presenting Author: Diego Córdoba
Student Presenter: No
Invited Presentation:
Authors
Diana Núñez Corresponding Author dianan01@ucm.es Universidad Complutense de Madrid |
Diego Córdoba Presenting Author dcordoba@fis.ucm.es Universidad Complutense de Madrid |
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Seismic Images of the Crustal Structure Beneath Cordillera Central and Cordillera Oriental, Dominican Republic
Category
Subduction Zone Structure From Trench to Arc