Study area, the UruS province, is located 70 km WNW of city of
Ankara. Major settlements in the study area are two counties, UruS and
Gü / dü / l / and there are a number of villages, such as, from W to E, Macun,
Yogunpelit, Kabaca, Ü / regil, Ö / zkö / y, Tahtaciö / rencik, Kirkkavak, Kavakö / zü / ,
Kayi and Karacaö / ren. The study area is 189 km2 in size and included in
1/25000-scaled topographic quadrangles of H28a3, a4, d1 and d2. The Gü / dü / l-
UruS section of the Ç / eltikç / i morphotectonic depression (Ç / eltikç / i Basin)
drained by the Antecedent Kirmir River and its second-order drainage
system was first mapped in detail in the present study, and faults determining
northern margin of the Ç / eltikç / i depression were named as the UruS fault set
comprising the SW part of the Ç / eltikç / i Fault Zone / and the mechanism of the
master fault of the UruS fault set was determined as left lateral oblique-slip
fault with reverse component by the morphologic markers such as the
deformed drainage system and pressure ridges. This was also supported by
the fault plane solutions of the 2000.08.22 UruS earthquake.
Three fault plane solutions, of which two of them for the 2000.08.22
UruS earthquake, and one of them for the 2003.02.27 Ç / amlidere earthquake,
were done to determine nature of the source.
Ground material underlying the city of Ankara were divided into three
categories: (a) well-lithified basement rocks, (b) Pliocene fluvio-lacustrine
v
sedimentary sequence, and (c) unconsolidated terrace and alluvial
sediments of Quaternary age. Quaternary unconsolidated sediments are
densely populated in Ankara. These sediments are fine-grained and have a
maximum thickness of 200 m or more. Inside these sediments, static ground
water level is very close (as on average: 6 m) to ground surface. These
conditions are quite suitable for liquefaction of these unconsolidated alluvial
sediments. In addition, basement rocks are full of zone of weakness. Even if,
the city of Ankara is characterized by the shallow focus and small
earthquakes (M& / #8804 / 5), it is open to the risk of large earthquakes to be sourced
from the North Anatolian Fault System and the Seyfe Fault Zone located 110
km and 80 km, respectively, owing the ground material conditions beneath
the city of Ankara. This point has to be taken out in constructions and site
selection solution.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12605238/index.pdf |
| Date | 01 July 2004 |
| Creators | Kaplan, Tulin |
| 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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