Correlation between seafloor heat flow and basement relief

observational and numerical examples and implications for upper crustal permeability

A. T. Fisher, Keir Becker

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

There is a strong positive correlation between bathymetric and well-navigated heat flow data from the Galapagos Mounds hydrothermal area and the east flank of the Juan de Fuca Ridge. A similar correlation is apparent at DSDP/ODP Site 504. The implications of this correlation are tested with a hydrogeological model of the shallow crust that contains significant permeability mainly within a few thin layers in the upper few hundred meters of basement. These simulations are compared directly to others in which the same bulk permeability is represented more homogeneously within the upper crust. A model with thin permeable zones and subtle relief beneath a flat seafloor can explain the variations in seafloor heat flow observed as one part of the Juan du Fuca Ridge east flank, as can a model with a flat seafloor and basement top but relief within the most permeable zone. Some form of permeability anisotropy appears to be required in order to achieve efficient lateral heat transport within the upper volcanic crust so as to produce the common seafloor heat flow-basement relief correlation. -from Authors

Original languageEnglish (US)
JournalJournal of Geophysical Research
Volume100
Issue numberB7
StatePublished - Jan 1 1995
Externally publishedYes

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basements
heat transmission
heat flow
permeability
relief
seafloor
Heat transfer
heat
crusts
ridges
crust
Anisotropy
Deep Sea Drilling Project
Ocean Drilling Program
upper crust
volcanology
anisotropy
simulation

ASJC Scopus subject areas

  • Geophysics
  • Oceanography
  • Forestry
  • Aquatic Science
  • Ecology
  • Condensed Matter Physics
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Materials Chemistry
  • Palaeontology

Cite this

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abstract = "There is a strong positive correlation between bathymetric and well-navigated heat flow data from the Galapagos Mounds hydrothermal area and the east flank of the Juan de Fuca Ridge. A similar correlation is apparent at DSDP/ODP Site 504. The implications of this correlation are tested with a hydrogeological model of the shallow crust that contains significant permeability mainly within a few thin layers in the upper few hundred meters of basement. These simulations are compared directly to others in which the same bulk permeability is represented more homogeneously within the upper crust. A model with thin permeable zones and subtle relief beneath a flat seafloor can explain the variations in seafloor heat flow observed as one part of the Juan du Fuca Ridge east flank, as can a model with a flat seafloor and basement top but relief within the most permeable zone. Some form of permeability anisotropy appears to be required in order to achieve efficient lateral heat transport within the upper volcanic crust so as to produce the common seafloor heat flow-basement relief correlation. -from Authors",
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N2 - There is a strong positive correlation between bathymetric and well-navigated heat flow data from the Galapagos Mounds hydrothermal area and the east flank of the Juan de Fuca Ridge. A similar correlation is apparent at DSDP/ODP Site 504. The implications of this correlation are tested with a hydrogeological model of the shallow crust that contains significant permeability mainly within a few thin layers in the upper few hundred meters of basement. These simulations are compared directly to others in which the same bulk permeability is represented more homogeneously within the upper crust. A model with thin permeable zones and subtle relief beneath a flat seafloor can explain the variations in seafloor heat flow observed as one part of the Juan du Fuca Ridge east flank, as can a model with a flat seafloor and basement top but relief within the most permeable zone. Some form of permeability anisotropy appears to be required in order to achieve efficient lateral heat transport within the upper volcanic crust so as to produce the common seafloor heat flow-basement relief correlation. -from Authors

AB - There is a strong positive correlation between bathymetric and well-navigated heat flow data from the Galapagos Mounds hydrothermal area and the east flank of the Juan de Fuca Ridge. A similar correlation is apparent at DSDP/ODP Site 504. The implications of this correlation are tested with a hydrogeological model of the shallow crust that contains significant permeability mainly within a few thin layers in the upper few hundred meters of basement. These simulations are compared directly to others in which the same bulk permeability is represented more homogeneously within the upper crust. A model with thin permeable zones and subtle relief beneath a flat seafloor can explain the variations in seafloor heat flow observed as one part of the Juan du Fuca Ridge east flank, as can a model with a flat seafloor and basement top but relief within the most permeable zone. Some form of permeability anisotropy appears to be required in order to achieve efficient lateral heat transport within the upper volcanic crust so as to produce the common seafloor heat flow-basement relief correlation. -from Authors

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