Heat productivities of various rocks

Table
Heat productivities of various rocks
rock type abundances
U
ppm Th
ppm Rb
ppm K
%
granite 3.4 50 220 4.45
andesite 1.9 6.4 67 2.35
oceanic basalt 0.5 0.9 9 0.43
peridotite 0.005 0.01 0.063 0.001
average upper-continental crust 2.5 10.5 110 2.7
average continental crust 1.0 2.5 50 1.25
rock type heat production total A
(in 10−6 calories per gram per year)
from U from Th from K
granite 2.52 9.95 1.16 13.63
andesite 1.41 1.27 0.61   3.29
oceanic basalt 0.37 0.18 0.11   0.66
peridotite 0.0037 0.002 0.0003     0.006
average upper-continental crust 1.85 2.09 0.7   4.64
average continental crust 0.74 0.5 0.33   1.56
Source: Modified from compilation by William Van Schmus in Robert S. Carmichael, ed., Handbook of Physical Properties of Rocks, vol. III, CRC Press, Inc. (1984).
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Universalium. 2010.

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