Mathematics – Logic
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..87..303v&link_type=abstract
Earth and Planetary Science Letters, Volume 87, Issue 3, p. 303-312.
Mathematics
Logic
6
Scientific paper
A linear relationship is commonly observed between heat flow and heat generation. It provides information about the distribution of radioelements with depth. Over large regions, the linear relationship is no more tenable, but points still cluster within an elongated trend in which a regression analysis provides the bulk reduced heat flow and a gross estimate of the heat production distribution with depth over the whole considered region. When geological provinces share an identical heat flow/heat generation relation they form a geothermal province. Data measurements in Western Europe suggest that at least two provinces should be considered. One can be related to the Hercynian crust and the second to the older Caledonian crust. We suggest that the depth obtained from thermal data corresponds to the depth of the mafic granulite layer. Western France, South and Central England share identical geothermal parameters which can be correlated with the depth of the granulitic layer down to 17-18 km. Data from Scotland do not fit the relationship of South and Central U.K. and present a lower slope indicating that the radiogenic enriched layer is shallow (8-10 km). This correlates with the seismic structure of the Caledonian crust where the granulite layer is observed at this depth. Data from Scotland can be compared to those from Norway, Newfoundland, New Hampshire and eastern Appalachian crust where the same crustal composition is observed.
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