Akademik Veri Yönetim Sistemi
Structural Geology And Global Tectonics, Trabzon, Türkiye, 24 - 26 Nisan 2019, ss.1, (Özet Bildiri)
Eurasian and Arabian plates are still converging and this convergence is
responsible for the majority of the Neotectonic events in the eastern
Mediterranean region. However, the timing of collision and complete consumption
of Neotethyan oceanic slab are still under debate.
Here we present preliminary magneto-stratigraphic results to constraint
the depositional age of one of the youngest marine sequences in the SE Anatolia,
the Van Formation. In addition, Anisotropy
of Magnetic Susceptibility (AMS) results are presented to show the style of
deformation, a tool that is used to determine principal strain ellipsoid
throughout the sequence. The formation is
determined as a key unit for the late stage evolution of the Neo-Tethys Ocean
in the SE Anatolia because it is thought as one of the last products of the
Southern Branch of Neo-Tethys Ocean in the SE Anatolia. The AMS patterns of
sedimentary units give information about the syn-or post- depositional
deformation prevailed in a region. Therefore, application of the technique on
m-scale dated sequences provides direct evidences on tectono-stratigraphic
evolution of a region. In this regard, from the Van formation, (a) 349
paleomagnetic core samples were collected and dated, and (b) major
sedimentological cycles and their AMS patterns were determined. As a result,
the age of the formation was determined as Burdigalian and a break in AMS
patterns (extension to contraction) was determined in a transition zone between
deep marine and shallow marine to continental deposits. The age of the
transition is early Burdigalian.
In a regional sense, we suggest that complete closure of the Neotethys
Ocean in the SE Anatolia is marked in marine to continental transition zone
sequences of the Van formation.