Summary
The results of geothermal research carried out in South Siberia (West-Siberian and Siberian Platforms, Altai-Sayan folded area and the Baikalian arched uplift zone) were employed to calculate the Earth's crustal temperatures. It is shown that temperature is a function of the heat flow value. The maps of the surface heat flow and the temperatures at the Moho discontinuity are presented and characteristic temperature-depth profiles were compiled for specific tectonic areas. The West-Siberian and Siberian Platforms, as well as the Altai-Sayan folded region are characterized by rather low heat flow, 42–50mW m−2(1.0–1.2 µcal/cm2s), and low temperatures at the Moho boundary.400–500 °C. The thermal conditions in the area of Lake Baikal are extreme, the heat flow reaches here100–142 mW m−2(2.4–3.4 µcal/cm2s), and the temperature at the crust's bottom may exceed1000 °C. The Moho-surface according to our calculations is nonisothermal.
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Sokolova, L.S., Duchkov, A.D. Crustal thermal models for South Siberia. Stud Geophys Geod 22, 200–207 (1978). https://doi.org/10.1007/BF01614046
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DOI: https://doi.org/10.1007/BF01614046