Print this pageStructural Model of Terrigenous Deposits in the Southern Pre-Adriatic Depression
FEZGA, FATMIR, and REXHEP KOCI
The Pre-Adriatic Depression extends on about 150 km in a North-South direction in the western part of Albania. We describe in this paper the southern part of Pre-Adriatic Depression. In the framework of hydrocarbon exploration significant data are collected in the studied area.
The combination of drilling results with multichannel seismic reflection data helped us to understand the structural model of terrigenous deposits in the southern part of the Pre-Adriatic Depression. So, from the interpretation of these data four major structures are delimited in these deposits: Panaja Structure, Babica Structure, Povelca and Frakulla Structure. All these structures are thrusted from East to West and separated from each other by listric faults that increase dip angles in the upper part of sedimentary section. The general trend of thrust faults is South East-North West.
Based on the stratigraphic analysis five major deposits sequences are identified in the western part of the studied area: Burdigalian Sequence, Serravallian Sequence, Tortonian Sequence, Messinian Sequence and Pliocene Sequence. In the southern part of Pre-Adriatic Depression these deposits sequences lie successively on each other except the Pliocene deposits that lie transgressively on some Messinian structures. Additionally the upper part of Pliocene deposits is truncated by erosion or non deposition.
According to all data available and stratigraphic analysis we deduced that sedimentation of the terrigenous deposits in the south Pre-Adriatic Depression began in the Lower Miocene. The missing of Upper Pliocene deposits and the fact that tectonic faults increase the dip angles show for the reactivation of older tectonic events and reforming of neogenic folding.