Study area, the Eskipazar Basin, is located in the western part of
the North Anatolian Fault System. It is a 3-5 km wide, 10 km long and NWSE
trending depression, bounded by a complex array of oblique-slip
normal faults and strike-slip faults.
The Eskipazar Basin is interpreted to be a superimposed basin. The
basin fill is composed of two different units deposited under the control of
different tectonic regimes, namely the paleotectonic and the neotectonic
regimes. The latest paleotectonic fill of the basin is the fluvio-lacustrine
deposits of the paleotectonic Eskipazar formation. This formation is
unconformably overlain by a group of neotectonic units namely, the
Budaklar, the Karkin and the imanlar formations. The unconformity in
between these paleotectonic and neotectonic units represents the time
interval during which the paleotectonic period comes to end and the
neotectonic period started. Thus, onset age of the strike-slip neotectonic
regime in the study area is Late Pliocene (& / #8764 / 2.6 My).
Common basin margin-bounding faults of the Eskipazar Basin are
the Kadilar fault set, the Beytarla Fault Zone, the Budaklar fault set, the
Arslanlar fault set, the Dibek fault, the Karkin fault, the Boztepe fault and
the Acisu fault. These faults display well preserved fault scarps, in places.
Morphological expressions of these faults and their geometrical
relationships to regional stress system indicate that these faults are mostlystrike-slip faults with normal component. However the Kadilar fault set
displays a different characteristic, being the major fault controlling the
basin to the west and it is indeed an oblique slip normal fault.
Long term seismicity and their epicentral distribution in and very
close to the study area suggest that the Eskipazar basin is located in an
area of seismic quiescence, nevertheless the morphotectonic expressions
of the faults exposing in the basin suggest that these faults are active.
Since the most of settlements are located on different lithologies of poorly
consolidated deposits of the Eskipazar formation susceptible to landslides,
the area is open to future earthquake hazard. Therefore, structures and
settlements have to be constructed on strong ground away from active
faults.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12605211/index.pdf |
| Date | 01 July 2004 |
| Creators | Biryol, Berk Cemal |
| Contributors | Kocyigit, Ali |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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