Blanc, G. et al. (1999): Circulation de fluide et subduction complete des sediments de la plaque Cocos (Leg ODP 170) Fluid flow and complete subduction of the Cocos Plate sediments, ODP Leg 170
Leg/Site/Hole:
Related Expeditions:
ODP 170
Identifier:
ID:
2000-004408
Type:
georefid
Creator:
Name:
Blanc, G.
Affiliation:
Universite Bordeaux I, Talence, France
Role:
author
Name:
Kastner, M.
Affiliation:
Scripps Institution of Oceanography, La Jolla, CA, United States
Role:
author
Name:
Lueckge, A.
Affiliation:
Forchungszentrum Juelich, Julich, Federal Republic of Germany
Role:
author
Name:
Silver, E.
Affiliation:
University California at Santa Cruz, Santa Cruz, CA, United States
Role:
author
Name:
Audry, S.
Affiliation:
Role:
author
Identification:
Title:
Circulation de fluide et subduction complete des sediments de la plaque Cocos (Leg ODP 170) Fluid flow and complete subduction of the Cocos Plate sediments, ODP Leg 170
Year:
1999
Source:
Comptes Rendus de l'Academie des Sciences, Serie II. Sciences de la Terre et des Planetes
Publisher:
Gauthier-Villars, Montrouge, France
Volume:
329
Issue:
2
Pages:
117-123
Abstract:
During Leg ODP 170, sediments were recovered from the incoming Cocos Plate, the frontal deformed wedge, the underthrust section and the apron which covers most of the Costa Rica slope. In situ temperature measurements, physical records (LWD) and chemical analyses of the sediment pore waters were also realized. Preliminary results of the Leg show that the regional low heat flow (12 mW.m (super -2) ) is certainly due to a sea water cooling of the uppermost crustal rocks. Fluids from deep origin circulate along the decollement and through the deformed sedimentary wedge. 99% of the incoming Cocos sediments are underthrust and the deformed wedge is made of material of the sedimentary apron that has flowed downslope to the toe of the slope and has been deformed by rapid and long term subduction beneath it.
Language:
French
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:11.1500 West:-86.1200 East:
-82.3000 South:8.0000
Keywords: Solid-earth geophysics; accretionary wedges; Central America; Cocos Plate; continental margin; cooling; Costa Rica; crust; decollement; deformation; drilling; faults; fluid phase; geochemistry; heat flux; hydrochemistry; Leg 170; marine sediments; mass balance; Ocean Drilling Program; oceanic crust; plate convergence; plate tectonics; sediments; subduction; temperature; underthrust faults; well-logging;
.