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GEOREF RECORD

Evidence for active subduction beneath Gibraltar

M. A. Gutscher, J. Malod, J. P. Rehault, I. Contrucci, F. Klingelhoefer, L. Mendes-Victor and W. Spakman
Evidence for active subduction beneath Gibraltar
Geology (Boulder) (December 2002) 30 (12): 1071-1074

Abstract

We report on a marine seismic survey that images an active accretionary wedge west of Gibraltar. Ramp thrusts offset the seafloor and sole out to an east-dipping decollement, indicating ongoing westward-vergent tectonic shortening. New traveltime tomographic results image a slab of oceanic lithosphere descending from the Atlantic domain of the Gulf of Cadiz, passing through intermediate-depth (60-120 km) seismicity beneath the westernmost Alboran Sea, and merging with a region of deep-focus earthquakes 600-660 km below Granada, Spain. Together, these new data provide compelling evidence for an active east-dipping subduction zone.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 30
Serial Issue: 12
Title: Evidence for active subduction beneath Gibraltar
Affiliation: Institut Universitaire Europeen de la Mer, Domaines Oceaniques, Plouzane, France
Pages: 1071-1074
Published: 200212
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 37
Accession Number: 2002-079373
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., sketch maps
N34°00'00" - N38°00'00", W12°00'00" - W02°00'00"
Secondary Affiliation: Cambridge University, GBR, United KingdomUniversity of Lisbon, PRT, PortugalUtrecht University, NLD, Netherlands
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200224
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