Heat flow from eastern Panama and northwestern Colombia |
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Authors: | JH Sass Robert J Munroe Thomas H Moses |
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Institution: | U.S. Geological Survey, Menlo Park, Calif. USA |
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Abstract: | Heat flows were determined at 12 sites in four distinct areas between longitude 77° and 80°W in eastern Panama and northwestern Colombia. Evidently, most of the region is underlain by mafic oceanic crust so that the crustal radiogenic component of heat flow is very small (~ 0.1 μcal cm?2 sec?1). Low heat-flow values (~ 0.7 μcal cm?2 sec?1) in northwestern Colombia may reflect thermal transients associated with shallow subduction. The normal values (~ 1) at about 78°W are consistent with the mean heat flow from the western Caribbean and the Gulf of Mexico. At 80°W, a fairly high value of 1.8 may define the easterly limit of thermal transients due to Cenozoic volcanic activity in Central America. |
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