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| Titel |
Paleomagnetic Evidence of the Neogene Tectonic Block Rotations in Eastern Anatolia |
| VerfasserIn |
Mualla Cengiz Cinku, Mumtaz Hisarli, Mehmet Keskin, Timur USTAOMER, Naci Orbay |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250095629
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| Publikation (Nr.) |
 EGU/EGU2014-11094.pdf |
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| Zusammenfassung |
| Paleomagnetic studies of Anatolia on the Neogene rocks have been interpreted mostly with
the westards excursion of Anatolia due to the collision between the Arabian plate and the
Eurasian plate along the Bitlis-Zağros belt. However, inside the collision zone no
paleomagnetic data are available. In order to describe the deformational history of Eastern
Anatolia during the Neotectonic period we carried out a palaeomagnetic study on Miocene to
Quaternary volcanic rocks at 100 different sites. The results indicate that the study area is
divided into several crustal blocks during the Neotectonic period. These blocks are termed
here the Van Block (VB), Kars Block (KB) and the Anatolian-Pontide Block (APB).
These blocks show different sense of rotations which occurred in two different
phases.
A rotational pattern is obtained from south to north in the order of ~20o counterclockwise
in the AB-PB and~23oclockwise rotation in the VB. Further north, however, a region with
no significant rotation is defined in the KB. The differences in rotations between these
blocks are observed across the NE-SW trending East Anatolian and NE Anatolian
Fault Zones, indicating that the North Anatolian Fault Zone is a younger feature.
AB and PB were first separated when the North Anatolian fault was formed and
AB started to rotate counterclockwise during the westward tectonic escape. The
significant differences in the amount of rotation between the AB- PB and the VB
indicate that most of the deformation occurred in Upper Miocene and Pliocene
time. Our results are in good agreement with the GPS data obtained from Anatolia. |
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