Physics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..85..439a&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 85, no. 4, Oct. 1987, p. 439-450.
Physics
43
Earth Crust, Geotemperature, Heat Transfer, Lithology, Canada, Geology, Potassium Isotopes, Thorium Isotopes, Uranium
Scientific paper
Concentrations of heat producing elements (Th, U, and K) in 58 samples representative of the main lithologies in a 100-km transect of the Superior Province of the Canadian Shield have been obtained. The relatively large variation in heat production found among the silicic plutonic rocks is shown to correlate with modal abundances of accessory minerals, and these variations are interpreted as premetamorphic. The present data suggest fundamental differences in crustal radioactivity distributions between granitic and more mafic terrains, and indicate that a previously determined apparently linear heat flow-heat production relationship for the Kapuskasing area does not relate to the distribution of heat production with depth.
Ashwal Lewis D.
Kelley Shari A.
Morgan Peter
Percival John A.
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