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

Omar J. Pérez, Roger Bilham, Rebecca Bendick, José R. Velandia, Napoleón Hernández, Carlos Moncayo, Melvin Hoyer, Mike Kozuch

Research output: Contribution to journalArticlepeer-review

117 Scopus citations

Abstract

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 ± 2 mm/a with an azimuth of N 84° ± 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.

Original languageEnglish
Pages (from-to)2987-2990
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number15
DOIs
StatePublished - Aug 1 2001

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