Heat flow, tectonics, and fluid circulation at the toe of the Barbados Ridge accretionary prism

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doi: 10.1029/JB095iB06p08859
Author(s): Foucher, Jean-Paul; Le Pichon, Xavier; Lallemant, Siegfried; Hobart, Michael A.; Henry, Pierre; Benedetti, Marc; Westbrook, Graham K.; Langseth, Marcus G.
Author Affiliation(s): Primary:
Inst. Fr. Rech. Exploit. Mer., Plouzane, France
Univ. Calif. at Santa Cruz, United States
Ec. Norm. Supér., France
Lamont-Doherty Geol. Obs., United States
Univ. Pierre et Marie Curie, France
Univ. Birmingham, United Kingdom
Volume Title: Special section on the Role of fluids in sediment accretion, deformation, diagenesis, and metamorphism in subduction zones
Volume Author(s): Langseth, Marcus G., editor; Moore, J. Casey
Source: Journal of Geophysical Research, 95(B6), p.8859-8867; Workshop on the Role of fluids in accretionary complexes, Il Ciocco, Tuscany, Italy, 1988, edited by Marcus G. Langseth and J. Casey Moore. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0148-0227
Note: In English. 19 refs.; illus. incl. 1 table, sketch maps
Summary: Detailed patterns of near surface tectonics and heat flow were investigated at two locations at the toe of the Barbados Ridge accretionary prism. At the two locations, in the thickly sedimented southern portion of the prism near 12°20'N and in the northern area drilled during Ocean Drilling Program (ODP) leg 110 near 15°32'N, relative highs of heat flow were associated with zones of thrusting. We attribute them to upward advection of water rising from the décollement along faults through the sediments. In the ODP area, a significant heating plate effect from warm fluids flowing along the décollement and thrusts is required to account for the high regional heat flow. This effect implies high rates of fluid flow at the décollement, which can only be non-steady state or would require massive lateral transport of fluids along strike. Copyright 1990 by the American Geophysical Union.
Year of Publication: 1990
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 18 Geophysics, Solid-Earth; Accretionary wedges; Atlantic Ocean; Barbados Ridge; Dehydration; Geophysical surveys; Heat flow; Leg 110; Marine sediments; North American Atlantic; North Atlantic; Ocean Drilling Program; Plate tectonics; Pore water; Sediments; Surveys; Tectonophysics; Thermal regime
Coordinates: N152000 N154500 W0583000 W0590000
Record ID: 1990053582
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