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Geothermal Energy in Finland

Geothermal Heat Flow Density (mW/m2) in Finland

 

Temperature (oC) at 500m below surface

 

Temperature (oC) at 1000m below surface

Finland is a part of the Fennoscandian (also known as the Baltic) Shield. The bedrock is Archaean (3100 - 2500 Ma) and Proterozoic (2500 - 1300 Ma) in age, and it is covered by a thin, usually less than 5 m thick layer of Quaternary sediments. The crystalline bedrock is characterized by granitoids, gneisses and other metasedimentary or metavolcanic lithologies.

Heat flow and subsurface temperature data in Finland have been presented by Puranen et al. (1968), Järvimäki and Puranen (1979), Kukkonen and Järvimäki (1992) and Kukkonen (1988, 1989, 1993, 1999). The current geothermal data is based on the temperature logs on 46 sites and 53 boreholes shallower than 1100 m, as well as laboratory measurements of thermal conductivity of corresponding drill core samples. The measurements and the databases are from the Geological Survey of Finland.

http://www.geothermie.de/egec_geothernet/menu/frameset.htm >> Geothermal Energy in Finland

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EGEC (European Geothermal Energy Council)