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Scientific Value of Coring the Proposed Southern Appalachian Research Drill Hole (1987) / Chapter Skim
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HEAT FLOW
Pages 32-35

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From page 32...
... In the absence of heat sources, determinations of heat flow at various depths in the southern Appalachian hole should be the same, irrespective of the thermal conductivity of the interval over which the product K(d T/dz) is determined.
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From page 33...
... Conductivity anisotropy can be significant in the deformed metamorphic rocks that will be penetrated in the southern Appalachian drill hole. Meaningful determination of vertical conductivity will require core samples.
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From page 34...
... Meaningful data for radioactive element distribution in layered metamorphic rocks, like those we expect to encounter in the southern Appalachian hole, will require careful examination and extensive sampling of essentially continuous core. Because the bulk of the U and Th in rocks commonly resides in rare grains of accessory minerals, along grain boundaries, or in veins or segregations, the distribution or redistribution of these elements in rocks cannot be understood without thin sections made from core.
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From page 35...
... The proposed deep hole, together with supplementary shallow heat flow sites, offers a unique opportunity to resolve the significance of the linear relation between heat flow and heat production in this region and perhaps provide constraints that are applicable globally. Because of the known low heat production of carbonates, quartzites, and Grenville basement below the master decollement, it should be possible to determine q*
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Key Terms

  • thermal conductivity
  • heat generation
  • linear relation
  • eastern united
  • flow determination

  • southern appalachian
  • reliable heat
  • heat production
  • geothermal gradient
  • conductivity measurements

  • flow sites
  • appalachian hole
  • metamorphic rocks
  • rock thermal
  • piedmont heat

  • determined heat
  • continental heat
  • shallow heat
  • heat sources
  • surface heat

  • flow data
  • late synmetamorphic
  • average rock
  • truncates granites
  • unique opportunity

  • granite plutons
  • meaningful data
  • tinuous core
  • sole thrust
  • various depths


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