C. DEMETRESCU, M. ENE, MARIA ANDREESCU
Centrul de Fizica Pamantului siSeismologie, Bucuresti – Magurele
ON THE GEOTHERMAL REGIME OF THE TRANSYLVANIAN DEPRESSION
(Abstract)
The paper presents the distribution of subsurface temperatures, geothermal
gradient, thermal conductivity of rocks, and heat flow in the central and eastern
Transylvanian Depression. On a background of slow lateral variation (5 mW • m
/10
km), the heat flow shows a maximum value of 45 mW • m
in the central area and a broad minimum of 29 – mWm
in the south-eastern quadrant. Toward the neighbouring Neogene volcanic zone,
the flow approaches 60 mWm.
The correlation heat flow – crustal structure is discussed on a NNW – SSE
profile concluding that the upper 10–12 km of the crust are responsible
for the lateral variations of the heat flow, and the upper mantle processes
for the low heat flow values.