Geothermal Energy Possibilities of Lithuania

Abstract

We present a survey of geothermal resources in Lithuania. It evaluates its amount, distribution over the area, possibilities of extraction and consumption, and tentative economical study.

Reasonably available geothermal sources are found in three hydrogeothermal complexes and crystalline basement rocks, i.e. petrogeothermal massif. We present maps of geothermal resource in the layers of sedimentary cover and of the crystal rock and a cross section view of the geologic and geothermal objects around Klaipeda. A schematic representation of a prospective geothermal power plant is included and supplied with tentative economic data.
The following distribution of prognostic P1 resources was found in the hydrothermal complexes and crystalline basement rocks.
" Upper/Middle Devonian-36.45 min t. CF over 13284 km2
" Middle/Lower Devonian-120.1 min t. CF over 22626 km2
" Cambrian 122.2 min. t. CF over 42444 km2
" petrogeothermal massif -298-10 3 min. t. CF at the consumers temperature regime 70/200C or 168-103 min. t. CF at the consumers temperature regime 90/40 oC over the area of 65 200 km2.
West Lithuania has most promising conditions for the exploitation of geothermal power. Closed geothermal circulation system say around Klaipeda, could produce power at the price below 5 USD/GJ.