People at Fort Hoofddijk

Derya Gürer
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D. Gürer, MSc
Paleomagnetic Laboratory
Fort Hoofddijk
ERC home page
Department of Earth Sciences
Utrecht University
Budapestlaan 17, 3584 CD Utrecht 
The Netherlands 

Phone +31 30 253 1361
E-mail M.D.Gurer@uu.nl

Research
Publications



Research of Derya Gürer

Kinematic reconstruction of Central and Eastern Anatolia since the late Cretaceous
Anatolia is located in a complex zone of collision and subduction of several continental fragments previously separated by strands of the Neotethys Ocean.
The relics of a northern strand of this ocean are distributed throughout Turkey as ophiolites, below which sedimentary units derived from continental and oceanic lithosphere were accreted and in places metamorphosed. A southern strand of the Neotethys is represented by the modern, still subducting eastern Mediterranean basin.

Location of the Ulukisla and Sivas basins in the tectonic framework of Turkey.

The continental domain in between is conceptually termed Anatolide-Tauride terrane(s). Different theories exist on the timing and way of the closure of one or possibly two Neotethyan oceanic strands between (and perhaps within) the Anatolide-Tauride domain, and the tectonic position and formation of the basins recording subduction history. 
The accreted terranes are, from north to south and old age of accretion to young, the Kirsehir Block (also known as the CACC, 85 Ma), the HP-LT Tavsanli (85-75 Ma) and Afyon (70-65 Ma) belts, and the essentially non-metamorphic Tauride fold and thrust belt (Late Cretaceous-Eocene).

Drilling Eocene turbidites in the Ulukisla basin, Turkey

In central Turkey, continental rocks arrived earliest in the subduction zone below the ophiolites and now form the Kirsehir Block. To the east, however, the continental passive margin was farther to the south and there is no evidence that continental rocks arrived in the southern subduction zone until the latest Cretaceous (~70-65 Ma). Overlying this deformed and metamorphosed accretionary wedge and ophiolites in central and eastern Anatolia are sedimentary basins that are in part synchronous with -and therefore may form a geological record of - the accretion of the Kirsehir Block, the HP units, and the Taurides in their sedimentary fill.

Mapping the southern margin of the Ulukisla basin.
The Bolkar mountain range is in the background

The main question to be addressed in this project is: how did the area to the east of the Kirsehir Block, between the Kirsehir Block and the eastern Taurides, tectonically evolve since ocean floor formation – the oldest basement unit - ~95 Myr ago?
The study area is occupied by the Ulukisla-Sivas basin, which is Late Cretaceous and younger in age, and is sandwiched between the Kirsehir Block in the north (and in eastern Anatolia, the Pontides in the north), and the southern and eastern Taurides in the southeast.

Ercan Özcan, expert on the taxonomy and biostratigraphy of upper Mesozoic foraminifera, and Derya sampling marine sediments of the Ulukisla basin
By studying the structure of the sedimentary basins, that formed in a fore-arc position relative to the southern strand of the Neotethys, this project is aimed to result in a kinematic reconstruction of central and eastern Anatolia, since ocean floor formation ~92 Myr ago.
 
To do so, field geology (structure, sedimentology, stratigraphy) is combined with paleomagnetic analysis of vertical axis rotations, and absolute age dating.


Liviu Matenco

Nuri Kaymakci & Douwe van Hinsbergen

Specific research objectives of the project include:

(1) constraining sedimentary basin evolution by deciphering its different stages by means of biostratigraphy and sequence stratigraphy

(2) identifying the deformation history of the overriding, originally oceanic plate as recorded in a number of sedimentary basins by means of field mapping, and quantifying the amount of deformation with regional cross sections

(3) constraining the rotation the area underwent by a paleomagnetic survey

(4) building a kinematic reconstruction of Central Turkey by restoring the study area (data collected during this project) and surrounding (from data in the literature) to its mid-Cretaceous position and geometry in GPlates software. This will allow the reconstruction of formation and evolution of Anatolian subduction zones through time.

(5) depending on the findings in this project, we leave options open to study the ages and geochemistry of a volcanic arc on the eastern Pontides, to constrain whether the cessation of arc volcanism on the Pontides was diachronous.

Miocene sediments of the Ulukisla basin with Aladaglar Range in the background
This project is part of the Subduction Initiation reconstructed from Neotethyan Kinematics (SINK) project funded by the European Research Council (ERC) Starting Grant to D.J.J. van Hinsbergen. SINK aims to identify the processes and mechanisms that lead to stresses enforcing subduction initiation and is subdivided into a number of smaller projects.
Derya’s project is supervised by D.J.J. van Hinsbergen, L. Matenco. Collaborators: C.G. Langereis (UU, The Netherlands), F. Corfu (UiO, Norway), E. Özcan (ITU, Turkey), D. Altiner, N. Kaymakci (METU, Turkey)

publications Publications of Derya Gürer
2016
  • Gürer, D., Van Hinsbergen, D.J.J., Matenco, L, Corfu, F., Cascella, A., (2016). Kinematics of a former oceanic plate of the Neotethys revealed by deformation in the Ulukışla basin (Turkey), Tectonics, 35, 2385-2416.   
  • Gürer, D., Galland, O., Corfu, F., Leanza, H.A. and Sassier, C. (2016).  Structure and evolution of volcanic plumbing systems in fold-and-thrust belts: a case study of Cerro Negro de Tricao Malal, Neuquén Province, Argentina,  GSA Bulletin, 128, 315-331.   
  • Van Hinsbergen, D.J.J., Maffione, M., Plunder, A.,Kaymakcı, N., Ganerød, M., Hendriks,B.W.H., Corfu, F., Gürer, D., de Gelder, G.I.N.O., Peters, K., McPhee, P.J., Brouwer, F.M., Advokaat, E.L. and Vissers, R.L.M. (2016). Tectonic evolution and paleogeography of the Kırşehir Block and the Central Anatolian Ophiolites, Turkey, Tectonics, 35, doi:10.1002/2015TC004018.   
2015
  • Van Hinsbergen, D.J.J., Peters, K., Maffione, M., Spakman, W., Guilmette, C., Thieulot, C., Plümper, O., Gürer, D., Brouwer, F.M., Aldanmaz, E., Kaymakci, N. (2015). Dynamics of intraoceanic subduction initiation: 2. Suprasubduction zone ophiolite formation and metamorphic sole exhumation in context of absolute plate motions, Geochemistry, Geophysics, Geosystems, 16, 1771-1785.  
2013
  • Barnes, S.J., Godel, B., Gürer, D., Brenan, J.M., Robertson, J., Paterson, D. (2013). Sulfide-olivine fe-ni exchange and the origin of anomalously ni rich magmatic sulfides, Economic Geology, 108, 1971-1982.
  • Godel, B., Barnes, S.J., Gürer, D., Austin, P., Fiorentini, M.L. (2013). Chromite in komatiites: 3D morphologies with implications for crystallization mechanisms, Contributions to Mineralogy and Petrology, 165, 173-189.