Shallower structure and geomorphology of the southern Puerto Rico offshore margin

Simple item page
dc.contributor.authorGranja Bruña, José Luis
dc.contributor.authorTen Brink, Uri S.
dc.contributor.authorMuñoz Martín, Alfonso
dc.contributor.authorCarbo Gorosabel, Andrés
dc.contributor.authorLlanes Estrada, María Pilar
dc.date.accessioned2023-06-18T06:46:36Z
dc.date.available2023-06-18T06:46:36Z
dc.date.issued2015-04-28
dc.description.abstractOblique convergence between the North American and Caribbean plates along the eastern Greater Antilles island arc has yielded the asymmetric Muertos thrust belt in the backarc region. Offshore south of Puerto Rico, this thrust belt disappears and is replaced by a succession of NEeSW- and EeW-trending deep basins and steep ridges that characterize the western Anegada passage, resulting in a complex deformation pattern. Using new high-resolution multibeam bathymetry and seismic reflection profiles, we studied the geomorphology and shallower structure of the southern Puerto Rico offshore margin. We have identified four morphotectonic provinces: the Puerto Rican sub-basin and Muertos trough, the Muertos margin, the insular shelf and the western Anegada passage. The Muertos margin province shows two distinct slope sub-provinces: the active Muertos thrust belt e which includes lower and upper thrust belts with distinct deformational styles and lateral continuity e and the shelf slope highly-incised by a dense canyon network. This network is disrupted by the Investigator fault zone consisting of a 130 km-long EeW-trending band of active extensional deformation. The Investigator fault zone shows differential surface expression caused by along-strike changes in the magnitude and distribution of the deformation, though this deformation is driven by a NeS-oriented extension. In the western Anegada passage province, the Whiting basin and Whiting and Grappler ridges are formed by large dip-slip normal faults driven by a NWeSE-oriented extensional regime. The western St. Croix rise shows a complex structure where the NEeSW-trending NW-dipping normal faults observed at the summit of the rise predate the EeW-bounding faults that could accommodate the extensional deformation at the Present. This study provides detailed observations on the active tectonic and sedimentary processes to help future studies assessing the natural resources and the seismic and tsunamigenic hazard in the Puerto Rico region.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/33036
dc.identifier.doi10.1016/j.marpetgeo.2015.04.014
dc.identifier.issn0264-8172
dc.identifier.officialurlhttp://dx.doi.org/10.1016/j.marpetgeo.2015.04.014
dc.identifier.urihttps://hdl.handle.net/20.500.14352/24140
dc.journal.titleMarine and Petroleum Geology
dc.language.isoeng
dc.page.final56
dc.page.initial30
dc.publisherElsevier
dc.relation.projectID(REN2003-08520)
dc.relation.projectID(CTM2006-13666)
dc.relation.projectID(CGL2010- 7715)
dc.rights.accessRightsrestricted access
dc.subject.keywordCaribbean plate
dc.subject.keywordPuerto Rico
dc.subject.keywordThrust belt
dc.subject.keywordAccretionary system
dc.subject.keywordImbricate structure
dc.subject.keywordNormal faults
dc.subject.keywordBlock tilting
dc.subject.ucmGeofísica
dc.subject.ucmGeología
dc.subject.ucmGeodinámica
dc.subject.unesco2507 Geofísica
dc.subject.unesco2506 Geología
dc.subject.unesco2507 Geofísica
dc.titleShallower structure and geomorphology of the southern Puerto Rico offshore margin
dc.typejournal article
dc.volume.number67
dspace.entity.typePublication
relation.isAuthorOfPublication3e70d521-0ccb-4af3-8e4c-5c243c232d24
relation.isAuthorOfPublication70f369a3-b3cd-43cb-874e-a7888da25de1
relation.isAuthorOfPublication0b951829-65a7-4e09-ba68-d53c60e74bfb
relation.isAuthorOfPublication63f0523e-8097-40e9-b43c-63ed0ca786d9
relation.isAuthorOfPublication.latestForDiscovery3e70d521-0ccb-4af3-8e4c-5c243c232d24
Download
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Granja et al_2015_Puerto Rico.pdf
Size:
20.54 MB
Format:
Adobe Portable Document Format
Download
Collections
Artículos