Evidence for dynamic relationship between faulting and Neogene-Quaternary volcanism in post-collisional Central Anatolia (Turkey): Implications for shallow slab subduction and rollback

Date

2018-12-10

Author

Schleiffarth, W.k.
Umhoefer, P.j.
Cosca, M.a.
Reid, M.r.
Delph, J.r.
Portner, D.e.
Beck, S.l.
Abgarmi, B.
Özacar, Atilla Arda

Metadata

Show full item record

Item Usage Stats

136
views

0
downloads

To investigate the tectonic and structural mechanisms that produced the spatial-temporal patterns of volcanism within the complex geodynamic setting of Central Anatolia, we obtained 25 new 40Ar/39Ar ages across the Miocene-Quaternary Central Anatolia Volcanic Province to constrain the ages of several individual volcanic centers. Based on the onset and duration of volcanism, we identify several Miocene-Pliocene time-progressive volcanic lineaments that are spatially and temporally associated with the Central Anatolia and Tuzgolu fault zones and the basins they developed. These new ages, coupled with existing kinematic data and geologic relationships, suggest that volcanism flared up at ca. 12 Ma after a long-lived magmatic lull in the area. Volcanism primarily migrated adjacent and parallel to transtensional and extensional fault zones and basin margins in a post-collisional extensional environment during overall plateau uplift. Regionally, the onset and duration of volcanism overwhelmingly migrated toward the southwest between ca. 12-2.5 Ma. Based on inferences from the geologic record and modern seismic observations, we suggest that the occurrence and southwest migration of magmatism in Central Anatolia was the result of southwest rollback of the Cyprean slab, which is partially torn laterally and currently dipping vertically beneath the Central Taurus Mountains. According to this model, the beginning of post-collisional extension in the early Miocene predated slab rollback and was related to complex regional tectonics of the Aegean, Anatolia, and Caucasus regions. We suggest that slab rollback induced dynamic subsidence, volcanism, and uplift above the migrating slab hinge from ca. 12-2.5 Ma. In contrast, Quaternary volcanism (ca. 2.5-0 Ma), which shows no evidence for temporal patterns, occurs in a broad NE-SW trend similar in distribution to Miocene-Pliocene volcanism and may be the product of adiabatic melting and tectonic escape following slab rollback, perhaps aided by upwelling mantle through and around the vertically-dipping and torn Cyprean slab.

URI

https://ui.adsabs.harvard.edu/abs/2018AGUFM.T43C..02S/abstract
https://hdl.handle.net/11511/74509
https://ui.adsabs.harvard.edu/abs/2018AGUFM.T43C..02S/abstract

Collections

Department of Geological Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Sedimentary records of past earthquakes in Boraboy Lake during the last ca 600 years (North Anatolian Fault, Turkey) Avşar, Ulaş; De Batıst, Marc; Schmidt, Sabine; Fagel, Nathalie (2015-09-01) Multiproxy sedimentological analyses along 4.9 m-long sequence of Boraboy Lake, which is located on the central eastern part of the North Anatolian Fault (NAF), reveal the sedimentary traces of past large earthquakes in the region. The lake has a relatively large catchment area (10 km(2)) compared to its size (0.12 km(2)), which renders sedimentation sensitive to heavy rain/storm events. Accordingly, the background sedimentation, which is composed of faintly laminated reddish/yellowish brown clayey silt, is...
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.
Understanding tsunamis, potential source regions and tsunami-prone mechanisms in the Eastern Mediterranean Yolsal, S.; Taymaz, Tuncay; Yalçıner, Ahmet Cevdet (Geological Society of London, 2007-01-01) Historical tsunamis and tsunami propagation are synthesized in the Eastern Mediterranean Sea region, with particular attention to the Hellenic and the Cyprus arcs and the Levantine basin, to obtain a better picture of the tsunamigenic zones. Historical data of tsunami manifestation in the region are analysed, and compared with current seismic activity and plate interactions. Numerical simulations of potential and historical tsunamis reported in the Cyprus and Hellenic arcs are performed as case studies in t...
Development of a geotechnical and geophysical database for seismic zonation of the Ankara Basin, Turkey Koçkar, Mustafa K.; Akgün, Haluk (Springer Science and Business Media LLC, 2008-07-01) Engineering geological and geotechnical site characteristics were assessed and seismic hazard studies performed for the Upper Pliocene to Pleistocene fluvial and Quaternary alluvial and terrace deposits for a site west of Ankara, Turkey. Sediment conditions were determined and a soil profile was characterized by surface geophysical methods. These studies were integrated with existing in-situ characterization studies to create a seismic and geotechnical database for the site. A seismic zonation map of the si...
Integrated Radiolaria, benthic foraminifera and conodont biochronology of the pelagic Permian blocks/tectonic slices and geochemistry of associated volcanic rocks from the Mersin Melange, southern Turkey: Implications for the Permian evolution of the northern Neotethys TEKİN, UĞUR KAĞAN; OKUYUCU, CENGİZ; Sayıt, Kaan; Bedi, Yavuz; Noble, Paula J.; Krystyn, Leopold; Göncüoğlu, Mehmet Cemal (2019-03-01) Blocks and tectonic slices within the Mersin Melange (southern Turkey), which are of Northern Neotethyan origin (Izmir-Ankara-Erzincan Ocean (IAE)), were studied in detail by using radiolarian, conodont, and foraminiferal assemblages on six different stratigraphic sections with well-preserved Permian succesions. The basal part of the Permian sequence, composed of alternating chert and mudstone with basic volcanics, is assigned to the late Asselian (Early Permian) based on radiolarians. The next basaltic int...

Citation Formats

W. k. Schleiffarth et al., “Evidence for dynamic relationship between faulting and Neogene-Quaternary volcanism in post-collisional Central Anatolia (Turkey): Implications for shallow slab subduction and rollback,” 2018, Accessed: 00, 2021. [Online]. Available: https://ui.adsabs.harvard.edu/abs/2018AGUFM.T43C..02S/abstract.