Terrestrial heat flow near Washington, D.C.
作者： W. H. Diment , R. W. Werre
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摘要: Temperatures were measured in three closely spaced holes that cored into quartz-mica schists near Washington, D.C. Measurements at several times during the 10 months after completion of drilling showed disturbance had a negligible effect on temperature gradients. The isothermal surfaces observed to be essentially level. mean gradient is 15.7°C/km depths between 300 and 1000 meters below sea principal conductivities anisotropic from are 6.62±0.75 8.61±0.17 meal/cm sec °C directions perpendicular parallel plane foliation, respectively. conductivity vertical direction 7.13±0.58. heat flow 1.1±0.1 μcal/cm2 without correction for climatic change. close other values (1.02, 0.97, 1.05) reported localities metamorphosed rocks Appalachian system, but it seems significantly higher than some foreland Valley Ridge province.
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