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• W2018668825 endingPage "27938" @default.
• W2018668825 startingPage "27917" @default.
• W2018668825 abstract "From an enlarged data set of temperature logs and thermal conductivity measurements, surface heat flow ( q s ) in the Erzgebirge was determined to range from 61 to 112 mW m −2 . U‐Th‐K 2 O data show that the heat flow pattern is controlled to first order by the occurrence of high heat production Variscan granites within a metamorphic basement. Highest heat flow correlates with granite plutons and sharply decreases off granite. These granites display variable but typically high radiogenic heat production ( A ), usually between 4 and 10 μW m −3 , depending on their chemical type and degree of fractionation. U accounts for 40–90% of the total heat production in the granites, whereas U and Th contribute equally to the radioactivity in the metamorphic basement. Compositional heterogeneity in the upper crust, owing to variation of conductive heat transfer, required corrections of measured surface heat flow up to 20 mW m −2 , depending on location of the heat flow site. Heat budget calculations, considering crustal models derived from seismic and gravimetric surveys, define the thickness ( D ) of crust enriched in radioactive elements to 15 km, the rate of reduced heat flow ( q *) to 30–34 mW m −2 , and the mantle heat flow to 20–30 mW m −2 , in contradiction to what is implied from q s ‐ A plots. In fact, D (5–8 km) and q * (45–52 mW m −2 ) from these plots represent the thickness of, and the heat flow beneath, the (granite) layer that is most enriched in heat‐ producing elements. For a crustal section strongly heterogeneous in upper crustal heat production, traditional interpretation of q s ‐ A plots is misleading and should be supplemented routinely by heat budget calculations." @default.
• W2018668825 created "2016-06-24" @default.
• W2018668825 creator A5054942272 @default.
• W2018668825 creator A5074423143 @default.
• W2018668825 date "2000-12-10" @default.
• W2018668825 modified "2023-10-14" @default.
• W2018668825 title "Crustal composition and mantle heat flow: Implications from surface heat flow and radiogenic heat production in the Variscan Erzgebirge (Germany)" @default.
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• W2018668825 doi "https://doi.org/10.1029/2000jb900279" @default.
• W2018668825 hasPublicationYear "2000" @default.
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