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Title: Heat flow from the West African shield

The heat flow over Precambrian shields is generally lower than over other continental provinces. Previous observations at 9 sites of the West African shield have shown that heat flow ranges from 20 mW m/sup -2/ in Niger to 38-42 mW m/sup -2/ in Liberia, Ghana and Nigeria. Since some of these values are lower than expected for Precambrian shields, it is important to find out whether or not they are representative of the entire shield before trying to derive its thermal structure. In this paper, we present new heat flow determinations from seven sites of the West African shield. These indicate that the surface heat flow is comparable with that of other Precambrian shields in the world.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
5243228
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophys. Res. Lett.; (United States); Journal Volume: 12:9
Research Org:
Centre Gaeologique et Geophysique, Montpellier, France
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; AFRICA; TEMPERATURE SURVEYS; GEOTHERMAL SYSTEMS; GHANA; HEAT FLOW; LIBERIA; NIGER; NIGERIA; PRECAMBRIAN ERA; TEMPERATURE MEASUREMENT; DEVELOPING COUNTRIES; GEOLOGIC AGES; GEOPHYSICAL SURVEYS; SURVEYS 150202* -- Geology & Hydrology of Geothermal Systems-- Non-USA-- (-1989)