NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Heat production in an Archean crustal profile and implications for heat flow and mobilization of heat-producing elementsConcentrations 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.
Document ID
19880031387
Document Type
Reprint (Version printed in journal)
Authors
Ashwal, L. D. (Lunar and Planetary Institute Houston, TX, United States)
Morgan, P. (Northern Arizona University Flagstaff, United States)
Kelley, S. A. (Southern Methodist University Dallas, TX, United States)
Percival, J. A. (Geological Survey of Canada Ottawa, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 85
Issue: 4 c
ISSN: 0012-821X
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NASW-4066
Distribution Limits
Public
Copyright
Other