Regional and local geothermal conditions in the northern Black Sea |
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Authors: | R I Kutas J Poort |
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Institution: | (1) Institute of Geophysics, National Academy of Ukraine, 32 Palladin Ave, 03680 Kiev 142, Ukraine;(2) Renard Centre of Marine Geology (RCMG), Universiteit Gent, Krijglaan 281 s8, 9000 Gent, Belgium |
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Abstract: | More than 100 new heat flow measurements have been collected in recent years (2002–2004) in different tectonic environments
of the northern Black Sea. The northern periphery of the Black Sea is characterized by strong geodynamic and seismic activity,
high sedimentation rates, diapiric structures, mud volcanism, and fluid and gas escape at the sea floor. We present new thermal
data from the shelf, continental slope and deep-water basin, measured off-shore using a marine thermo-probe and on-shore in
drill holes. Heat flow density ranges from 20 to more than 2,000 mW/m2. For two local areas (the Dnieper gas seeps and the Dvurechenski mud volcano area), we discuss the relation between heat
flow variability and the geological and physical processes in the near-bottom sediment layer. The Dnieper gas seeps area is
characterized by strong small-scale heat flow variability and is controlled by fluid and gas migration. In the Dvurechenski
active mud volcano, the near-bottom temperature in sediments is anomalously elevated because additional heat is carried out
by mass flows of fluids and clay minerals. Away from the mud volcano heat flow quickly decreases to background values. |
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Keywords: | Black Sea Temperature Heat flow Gas seeps Mud volcano |
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