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| Titel |
The junction of Hellenic and Cyprus arcs: the Bey Daglari lineament, offshore termination of the Antalya Basin |
| VerfasserIn |
A. Gogacz, J. Hall, G. Çifçi, D. Yaşar, M. Küçük, C. Yaltırak, A. Aksu |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250023268
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| Zusammenfassung |
| The Antalya Basin is one of a series of basins that sweep along the Cyprus Arc in the forearc
region between the (formerly) volcanic Tauride Mountains on Turkey in the north and the
subduction zone and associated suture between the African plate and the Aegean-Anatolian
microplate in the eastern Mediterranean, south of Cyprus. Miocene contraction occurs
widely on southwest verging thrusts. Pliocene-Quaternary structures vary from
extension/transtension in the northeast, adjacent to the Turkish coastline, to transpression in
the southwest, farther offshore.
All these structures are truncated at the northwest end of the Antalya Basin by a
broad zone of NNE-SSW-trending transverse structure that appears to represent a
prolongation of the extreme easterly transform end of the Hellenic arc. Our mapping
suggests that this broad zone links the Hellenic Arc with the Isparta Angle in southern
Turkey, which we suggest is an earlier location of the junction of Hellenic and Cyprus
Arcs: the junction migrated to the southwest over time, as the Hellenic Arc rolled
back.
The Turkish coastline turns from parallel to the Antalya Basin structures in the east to a
N-S orientation, cutting across the trend of the Antalya Basin. The Antalya Complex and the
Bey Dağlari Mountains provide a spectacular backdrop to this edge of the offshore basin.
Somewhere offshore lies the structural termination of the Antalya Basin. In 2001, we
acquired around 400 km of high-resolution multi-channel seismic reflection data across the
western end of the Antalya Basin to explore the nature of the termination, which we call
the Bey Dağlari lineament. We present a selection of the seismic profiles with
interpretation of the nature and Neogene history of the lineament. Landward of
the N-S-trending coastline, ophiolites of the Antalya Complex are exposed in a
series of westerly-verging thrust slivers that extend to the carbonate sequences of
the Bey Dağlari Mountains. Our seismic data indicate that N-S trending west-
and east-verging thrusts define a transpressional continental margin. The shelf is
underlaing by a prominent angular unconformity between overlying shallow-dipping
Pliocene-Quaternary sediments and underlying, easterly-dipping ?Miocene sediments. |
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