Insights into biaxial extensional tectonics: an example from the Sandikli Graben, West Anatolia, Turkey

Date

2003-01-01

Author

Cihan, M
Sarac, G
Gokce, O

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

267
views

0
downloads

West Anatolia, together with the Aegean Sea and the easternmost part of Europe, is one of the best examples of continental extensional tectonics. It is a complex area bounded by the Aegean-Cyprus Arc to the south and the North Anatolian Fault Zone (NAFZ) to the north. Within this complex and enigmatic framework, the Sandikli Graben (10 km wide, 30 km long) has formed at the eastern continuation of the Western Anatolian extensional province at the north-northwestward edge of the Isparta Angle. Recent studies have suggested that the horst-graben structures in West Anatolia formed in two distinct extensional phases. According to this model the first phase of extension commenced in the Early-Middle Miocene and the last, which is accepted as the onset of neotectonic regime, in Early Pliocene. However, it is controversial whether two-phase extension was separated by a short period of erosion or compression during Late Miocene-Early Pliocene. Both field observations and kinematic analysis imply that the Sandikli Graben has existed since the Late Pliocene, with biaxial extension on its margins which does not necessarily indicate rotation of regional stress distribution in time. Although the graben formed later in the neotectonic period, the commencement of extension in the area could be Early Pliocene (c. 5 Ma) following a severe but short time of erosion at the end of Late Miocene. The onset of the extensional regime might be due to the initiation of westward motion of Anatolian Platelet along the NAFZ that could be triggered by the higher rate of subduction at the east Aegean-Cyprus Arc in the south of the Aegean Sea. Copyright (C) 2003 John Wiley Sons, Ltd.

Subject Keywords

Geology

URI

https://hdl.handle.net/11511/66236

Journal

GEOLOGICAL JOURNAL

DOI

https://doi.org/10.1002/gj.928

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

Analysis of Plio-Quaternary deep marine systems and their evolution in a compressional tectonic regime, Eastern Black Sea Basin Sipahioglu, N. O.; Karahanoğlu, Nurkan; Altıner, Demir (Elsevier BV, 2013-05-01) Facies architecture of submarine fans and channel-levee complexes in the Eastern Black Sea Basin and their evolution from the Late Miocene until the present day are studied using a three-dimensional seismic data set covering an area of approximately 1161 km(2). The interpretation of the observations reveals the outcome of the changing interplay between rate of sedimentation and compressional tectonism in the area through time.
Modeling of mogan and eymir lakes aquifer system Yağbasan, Özlem; Yazıcıgil, Hasan; Department of Geological Engineering (2007) Mogan and Eymir Lakes, located 20 km south of Ankara, are important aesthetic, recreational, and ecological resources. Dikilitaş and İkizce reservoirs, constructed on upstream surface waters, are two man-made structures in the basin encompassing an area of 985 km2. The purpose of this study is (1) to quantify groundwater components in lakes’ budgets, (2) to assess the potential impacts of upstream reservoirs on lake levels, and (3) to determine effects of potential climatic change on lakes and groundwater l...
Analysis of crust and mantle structure across Turkey using passive seismic data Abgarmi, Bizhan; Özacar, Atilla Arda; Department of Geological Engineering (2019) Anatolia is one of the most tectonically active regions in the world which is amalgamation of different terranes and structures. This region has a complextectonic evolution which includes various stages of subduction and collision. This complexity demands more detailed observations of the crust and upper mantle to generate a comprehensive geodynamic model. However, the knowledge related to crust and mantle structure beneath Anatolia is still very limited so the fates of the structures in deeper interiors ar...
Mafic microgranular enclaves and interaction between felsic and mafic magmas in the agacoren intrusive suite: Evidence from petrographic features and mineral chemistry Kadioglu, Yusuf Kagan; Güleç, Nilgün Türkan (Informa UK Limited, 1996-01-01) The Agacoren Intrusive Suite is exposed as a large intrusive body over ∼500 km2 east of Lake Tuz in central Anatolia and consists of the Cokumkaya gabbro, the Agacoren granitoid, and young dikes. The Agacoren granitoid is the predominant lithology of the Agacoren Intrusive Suite, and is differentiated into several subunits ranging in composition from monzonite, through granite, to alkali feldspar granite. The Cokumkaya gabbro occurs as stocks enclosed in the Agacoren granitoid; individual bodies range in si...
Tectonic evolution of the Gediz Graben: field evidence for an episodic, two-stage extension in western Turkey Bozkurt, Erdin (Cambridge University Press (CUP), 2004-01-01) Western Turkey is one of the most spectacular regions of widespread active continental extension in the world. The most prominent structures of this region are E-W-trending grabens (e.g. Gediz and Buyuk Menderes grabens) and intervening horsts, exposing the Menderes Massif. This paper documents the result of a recent field campaign (field geological mapping and structural analysis) along the southern margin of the modern Gediz Graben of Pliocene (similar to 5 Ma) age. This work provides field evidence that ...

Citation Formats

M. Cihan, G. Sarac, and O. Gokce, “Insights into biaxial extensional tectonics: an example from the Sandikli Graben, West Anatolia, Turkey,” GEOLOGICAL JOURNAL, pp. 47–66, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66236.