Consolidation patterns during initiation and evolution of a plate-boundary decollement zone: Northern Barbados accretionary prism

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
1998
Editor: 
Journal Title: 
Geology
Journal Date: 
Sep
Place Published: 
Tertiary Title: 
Volume: 
26
Issue: 
9
Pages: 
811-814
Section / Start page: 
Publisher: 
ISBN Number: 
0091-7613
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:000075740300011
LDEO Publication Number: 
Call Number: 
Abstract: 

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.

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116THTimes Cited:32Cited References Count:23

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