Seismological evidence on the geometry of the orogenic system in central-northern Ecuador (South America)

Details Seismological evidence on the geometry of the orogenic system in central-northern Ecuador (South America) Seismological evidence on the geometry of the orogenic system in central-northern Ecuador (South America)

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3749g&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 19, p. 3749-3752

Physics

24

Structural Geology: Local Crustal Structure, Tectonophysics: Dynamics, Seismotectonics, Tectonophysics: Plate Boundary-General, Information Related To Geographic Region: South America

Scientific paper

Analysis of the spatial distribution of seismicity beneath central Ecuador from a temporary network gives new insights on two main points of the Ecuadorian tectonics. Major structures in the Ecuadorian Andes are East-dipping Late Jurassic to Paleogene sutures reactivated by present-day compression. The oceanic plate is plunging continuously down to a depth of about 200 km with a dip of 25°-35°. We also show that the coastal plain acts as a buttress transmitting stresses to the Andes, beneath which deformation is concentrated.

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