Moore, J. Casey et al. (1998): Consolidation patterns during initiation and evolution of a plate-boundary decollement zone; northern Barbados accretionary prism

Leg/Site/Hole:
ODP 110
ODP 156
ODP 171A
ODP 171A 1044
ODP 171A 1045
ODP 171A 1046
ODP 171A 1047
ODP 171A 1048
ODP 110 672
ODP 156 948
Identifier:
1998-058249
georefid

10.1130/0091-7613(1998)026<0811:CPDIAE>2.3.CO;2
doi

Creator:
Moore, J. Casey
University of California at Santa Cruz, Earth Sciences Department, Santa Cruz, CA, United States
author

Klaus, Adam
Ocean Drilling Program, United States
author

Bangs, Nathan L.
University of Texas at Austin, United States
author

Bekins, Barbara A.
U. S. Geological Survey, United States
author

Buecker, Christian J.
Niedersaechsisches Landesamt fuer Bodenforschung Geowissenschaftliche, Federal Republic of Germany
author

Brueckmann, Warner
Christian-Albrechts-Universitaet, Federal Republic of Germany
author

Erickson, Stephanie N.
University of Utah at Salt Lake City, United States
author

Hansen, Olav
STATOIL, Norway
author

Horton, Thomas
Anadrill Schlumberger, United States
author

Ireland, Peter
Lamont-Doherty Earth Observatory, United States
author

Major, Candace Olson
University of Hawaii, United States
author

Moore, Gregory F.
University of Birmingham, United Kingdom
author

Peacock, Sheila
University of Tokyo, Japan
author

Saito, Saneatsu
University of Florida at Gainesville, United States
author

Screaton, Elizabeth J.
Dalhousie University, Canada
author

Shimeld, John W.
Istanbul Teknik Universitesi, Turkey
author

Stauffer, Philip Henry
author

Taymaz, Tuncay
author

Teas, Philip A.
author

Tokunaga, Tomochika
author

Identification:
Consolidation patterns during initiation and evolution of a plate-boundary decollement zone; northern Barbados accretionary prism
1998
Geology (Boulder)
Geological Society of America (GSA), Boulder, CO, United States
26
9
811-814
Borehole logs from the northern Barbados accretionary prism show that the plate-boundary decollement initiates in a low-density radiolarian claystone. With continued thrusting, the decollement zone consolidates, but in a patchy manner. The logs calibrate a three-dimensional seismic reflection image of the decollement zone and indicate which portions are of low density and enriched in fluid, and which portions have consolidated. The seismic image demonstrates that an underconsolidated patch of the decollement zone connects to a fluid-rich conduit extending down the decollement surface. Fluid migration up this conduit probably supports the open pore structure in the underconsolidated patch.
English
Serial
Coverage:Geographic coordinates:
North:15.3800
West:-58.4600East: -58.3700
South:15.3000

Solid-earth geophysics; Oceanography; accretionary wedges; Atlantic Ocean; Barbados Ridge; calibration; Cenozoic; clastic rocks; clay mineralogy; claystone; consolidation; Cretaceous; decollement; density logging; faults; geophysical methods; geophysical surveys; Leg 110; Leg 156; Leg 171; Leg 171A; marine sediments; Mesozoic; North Atlantic; Ocean Drilling Program; ODP Site 1044; ODP Site 1045; ODP Site 1046; ODP Site 1047; ODP Site 1048; ODP Site 672; ODP Site 948; plate boundaries; plate tectonics; reflection methods; sedimentary rocks; sedimentation rates; sediments; seismic methods; surveys; three-dimensional models; thrust faults; well-logging;

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