Velocity field across the southern Caribbean plate boundary and estimates of Caribbean/South-American plate motion using GPS geodesy 1994-2000

Details Velocity field across the southern Caribbean plate boundary and estimates of Caribbean/South-American plate motion using GPS geodesy 1994-2000 Velocity field across the southern Caribbean plate boundary and estimates of Caribbean/South-American plate motion using GPS geodesy 1994-2000

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2987p&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 15, p. 2987-2990

Physics

24

Geodesy And Gravity, Geodesy And Gravity: Crustal Movements-Interplate, Tectonophysics: Plate Motions-General, Tectonophysics: Plate Motions-Present And Recent

Scientific paper

Global Positioning System (GPS) observations between 1994 and 2000 at twenty-two sites in the Lesser Antilles and northern South-America indicate that the Caribbean plate, along its southern boundary, slips at a rate of 20.5+/-2mm/a with an azimuth of N84°+/-2°E at 65°W, relative to the South-American plate. East of 68°W, 80% of the dextral slip is contained within a 80-km wide shear zone centered on the El Pilar-San Sebastián fault system. West of 68°W the plate boundary broadens to more than 300 km with dextral shear shared between the northeast trending Boconó fault (9-11 mm/a) in western Venezuelan, and an offshore system near the northern coast.

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