Thrust dissection control of deep-water elastic dispersal patterns in the Klematia-Paramythia foreland basin, western Greece

The Klematia-Paramythia basin is an internal part of the middle Ionian zone of the Hellenide orogen in western Greece. It consists of Middle Eocene to Late Miocene turbidites, up to 3300 m thick, which were deposited in a ser ies of submarine fans. Field studies suggest that the configuration and the depositional environments of the basin were affected by two tectonic phase s. During the first tectonic phase, in Middle Eocene to Late Oligocene time s, a foreland basin was formed west of the Pindos Thrust front. During the second tectonic phase, in the Early Miocene, the Ionian zone (a part of the foreland basin) was subdivided by internal thrusting into three sub-basins (internal, middle and external) and changed to a complex type foreland bas in. Comparison of the type and facies associations of the turbidite deposit s that accumulated within the basin suggests that these two tectonic phases had a significant effect on sedimentary dispersal patterns. During the fir st tectonic phase in the Klematia-Paramythia basin (when it was part of the foreland basin), fine-grained turbidites, up to 1050 m thick, accumulated on the distal part of a submarine fan. The lower part (900 m thick) of thes e deposits consists of thin to thick interbedded sandstone/mudstone beds wh ich are interpreted as lobes and lobe-fringe (outer-fan) deposits. The uppe r parts (150 m thick) of these deposits are composed of very thin to thin s iltstone/mudstone beds, representing a basin plain environment. During the second tectonic phase, sediments up to 2260 m thick were deposited in the K lematia-Paramythia basin. These deposits are interpreted as lobes and lobe- fringe (outer-fan) fine-grained turbidites in the central part of the basin , channel and interchannel deposits (inner-fan) in some areas of the periph ery of the basin, and shelf deposits in the northern and southern terminati ons of the basin.