Seismic Data of the Carpathian Foredeep Basement (Romania)
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The Carpathian foredeep is a molasse-bearing depression that formed in front of the folded eastern and southern Carpathians in the Late Miocene. Deep seismic reflection/ refraction profiles as well as gravity and thermal studies carried out in the foredeep area of the southern and eastern Carpathians provide information on the crustal structure of the study region. The variability in the reflectivity pattern and crustal thickness shown by the different sectors of the Carpathian foredeep are due to differences in the structure and lithology as well differences in crustal age (Klemperer, 1987; Wever et al., 1987).
In western part of the southern Carpathian foredeep reflectivity increases with depth and Moho is deliniated by strong reflections at 9–11.5 s two-way travel time (TWT) (30 – 33 km depth). The eastern side of the southern Carpathian foredeep shows a decreasing reflectivity with depth, the crustal base being interpreted at 12–13 s TWT (40–45 km depth) (Raileanu et al., 1994).
The eastern Carpathian foredeep is characterized by an almost transparent upper crust and a layered lower crust down to 13 s TWT (40–45 km depth). The greatest thickness of foredeep rocks is in the eastern Carpathian arc bend (Focsani depression), where Neogene rocks are 8 to 10 km thick.
KeywordsSeismic Data Lower Crust Seismic Section Reflectivity Pattern Heat Flow Data
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