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Table 4 Compilation of the average potassium (K), thorium (Th), and uranium (U) concentrations (c) and average heat production (A) based on the spectral gamma ray log for the crystalline bedrock interval between 1977 and 3697 m in DGE-1
Rock type and intervals | Avg. conc. potassium, % | Avg. conc. thorium, ppm | Avg. conc. uranium, ppm | Avg. heat production (A), μW/m3 |
|---|---|---|---|---|
Intervals of metabasite, amphibolite, and dolerite | 1.3 | 12.5 | 15.0 | 5.4 |
Intervals of gneiss and granite | 4.4 | 22.6 | 16.0 | 5.9 |
Interval: 1977–2980 m | 3.6 | 24.8 | 15.9 | 7.6 |
Interval: 2980–3697 m | 4.2 | 15.5 | 8.7 | 3.4 |
Complete section: 1977–3697 m | 3.9 | 20.9 | 15.9 | 5.8 |