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

Journal Article · Sun Jun 10 04:00:00 EDT 1990 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JB095iB06p08859· OSTI ID:5009494

Foucher, J P ^[1]; le Pichon, X; Lallemant, S; Henry, P ^[2]; Hobart, M A; Langseth, M G ^[3]; Benedetti, M ^[4]; Westbrook, G K ^[5]

---

1. Inst. Francais de Recherche pour l'Exploitation de la Mer, Plouzane (France)
2. Ecole Normale Superieure, Paris (France)
3. Lamont-Doherty Geological Observatory, Palisades, NY (United States)
4. Univ. Pierre et Marie Curie, Paris (France)
5. Univ. of Birmingham (England)

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{degree}20{prime}N and in the northern area drilled during Ocean Drilling Program (ODP) leg 110 near 15{degree}32{prime}N, relative highs of heat flow were associated with zones of thrusting. The authors attribute them to upward advection of water rising from the decollement along faults through sediments. In the ODP area, a significant heating plate effect from warm fluids flowing along the decollement and thrusts is required to account for the high regional heat flow. This effect implies high rates of fluid flow at the decollement, which can only be non-steady state or would require massive lateral transport of fluids along strike.

• OSTI ID: 5009494
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:B6; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ADVECTION
BARBADOS
BOREHOLES
CAVITIES
DIMENSIONS
DRILLING
FLUID FLOW
FLUIDS
GEOLOGIC FAULTS
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GROUND WATER
HEAT FLOW
HYDROGEN COMPOUNDS
HYDROLOGY
INTERSTITIAL WATER
ISLANDS
LESSER ANTILLES
MASS TRANSFER
OXYGEN COMPOUNDS
RESERVOIR FLUIDS
SEDIMENTS
SUBDUCTION ZONES
TECTONICS
THICKNESS
WATER
WELL DRILLING
WEST INDIES