M. VISARION si S. VELICIU
Institutul de Geologie si Geofizica, Bucuresti
SOME CONSIDERATIONS OF THE LOW HEAT FLOW IN THE TRANSYLVANIAN BASIN
(Abstract)
In order to explain the low heat flow observed in the Transylvanian Basin,
present day geological and geophysical data are reviewed. This young (Neogene)
intramountain basin exhibits some features which make it distinct as compared
with other typical ensialic intra-arc basins.
By means of the surface heat flow and heat generation data, reasonable geothermal
models across Transylvania are given. The calculated mantle heat flow ranges
from 20 to 30 mW • m
and the temperature at the base of the crust (~6000°C)
is lower in comparison with the Pannonian Basin (800 – 900°C). Consequently,
geotherms indicate a thicker and cooler lithosphere for Transylvania.