The tectonics of the Central Anatolian Crystalline Complex a structural, metamorphic and paleomagnetic study

141 Pages·2012·67.61 MB·English

by  Côme Lefebvre

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ISBN 978-90-6266-283-8 3 003 UTRECHT STUDIES IN EARTH SCIENCES
The tectonics of the Central Anatolian Crystalline Complex:
a structural, metamorphic and paleomagnetic study
Côme Lefebvre
UTRECHT STUDIES IN EARTH SCIENCES
No. 003
Members of the dissertation committee:
Dr. F.M. Brouwer
Faculteit der Aard- en Levenswetenschappen, Vrije Universiteit
Amsterdam, The Netherlands
Prof. dr. R. Oberhänsli
Institut für Erd- und Umweltwissenschaften, Universität Potsdam
Potsdam, Germany
Prof. dr. A.I. Okay
Avrasya Yerbilimleri Enstitüsü, Istanbul Teknik Üniversitesi
Istanbul, Turkey
Prof. dr. S.M. Schmid
Institut für Geophysik, ETH Zürich
Zürich, Switzerland
Prof. dr. M.J.R. Wortel
Departement Aardwetenschappen, Universiteit Utrecht
Utrecht, The Netherlands

The research of this thesis was carried out at:
Structural Geology and Teconics group
Department of Earth Sciences
Faculty of Geosciences
Utrecht University
Budapestlaan 4
3584 CD Utrecht
The Netherlands
ISBN: 978-90-6266-283-8
Cover illustration:
top: Panorama view of the Ömerhacılı area (west of Kırşehir).
bottom: Micrograph of a calcite protomylonite from the Kaman area.
The tectonics of the Central Anatolian Crystalline Complex:
a structural, metamorphic and paleomagnetic study
Orta Anadolu Kristalen Kompleksinin tektoniği:
yapısal, metamorfik ve paleomanyetik bir çalışma
(Türkçe Öz ile birlikte)
La tectonique du Complexe Cristallin d’Anatolie Centrale:
une étude structurale, métamorphique et paléomagnétique
(avec un résumé en français)
De tektoniek van het Centraal Anatolische Kristallijne Complex:
een structurele, metamorfe en paleomagnetische studie
(met een samenvatting in het Nederlands)
Proefschrift
ter verkrijging van de graad van doctor aan de Universiteit Utrecht op gezag van de rector magnificus,
prof.dr. G.J. van der Zwaan, ingevolge het besluit van het college voor promoties in het openbaar te
verdedigen op vrijdag 11 november 2011 des ochtends te 10.30 uur
door
Côme Jean Charles Lefebvre
geboren op 23 november 1983
te Lyon, Frankrijk
Promotor: Prof. dr. R.L.M Vissers

Co-promotoren: Dr. D.J.J. van Hinsbergen
Dr. N. Kaymakci
This thesis was accomplished with financial support from the Netherlands Research Centre for Integrated
Solid Earth Sciences (ISES), the Netherlands Organisation for Scientific Research (NWO) and the
DARIUS Programme.
Copyright © 2011 Côme Lefebvre
Niets uit deze uitgave mag worden vermenigvuldigd en/of openbaar gemaakt door middel van druk,
fotokopie of op welke andere wijze dan ook zonder voorafgaande schriftelijke toestemming van de
uitgevers.
All rights reserved. No part of this publication may be reproduced in any form, by print or photo print,
microfilm or any other means, without written permission by the publishers.

6
Table of contents
Bibliography 9
Abstract 10
Öz 11
Résumé 12
Samenvatting 13
Introduction 15
Chapter 1
Late Cretaceous extensional denudation along a marble detachment fault zone
in the Kırşehir massif near Kaman, Central Turkey 19
Abstract
1.1 Introduction 20
1.2 Geological setting 21
1.3 Characteristics of the contact between the CAM and CAO in the vicinity of Kaman 24
1.4 The contact between the Kırşehir metamorphics and the
Baranadağ quartz monzonite close to Ömerhacılı 31
1.5 Synthesis - Discussion 33
1.6 Conclusions 36
Chapter 2
P-T-t-d evolution and extensional exhumation history of a high-temperature
complex (Hırkadağ Block, Central Anatolia) 39
Abstract
2.1 Introduction 40
2.2 Geological Setting 40
2.3 Metamorphism of the Hırkadağ Block 45
2.4 Structural analysis of the Hırkadağ Block 51
2.5 Geochronology 55
2.6 Discussion 56
2.7 Conclusions 58
Chapter 3
Reconstructing the geometry of central Anatolia during the late Cretaceous:
Large-scale Cenozoic rotations and deformation between the Pontides and Taurides 61
Abstract
3.1 Introduction 62
3.2 Geology of the CACC 62
3.3 Paleomagnetic sampling, analysis and reliability check 65
7
3.4 Paleomagnetic results 69
3.5 Discussion 73
3.6 Conclusion 77

Chapter 4
Late Cretaceous exhumation and crustal flow in the CACC: a study on the
structural and metamorphic evolution of the Kırşehir and Akdağ Massifs 85
Abstract
4.1 Introduction 86
4.2 Geological setting 86
4.3 Structure and metamorphism of the Akdağ Massif 91
4.4 Structure and Metamorphism of the Kırşehir Massif 95
4.5 40Ar/39Ar geochronology 101
4.6 Discussion: development and evolution of the northern central Anatolian HT domes 104
4.7 Conclusion 107
Chapter 5
The CACC during the Late Cretaceous: tectonic evolution and geodynamic setting 111
Abstract
5.1 Introduction 112
5.2 Geology of the Central Anatolian Crystalline Complex 112
5.3 Restoration and internal architecture of the CACC in the late Cretaceous 114
5.4 Structural and magmatic evolution of the CACC 119
5.5 Plate tectonic setting and evolution of the CACC since the late Cretaceous 122
5.6 Implications at a plate tectonic scale 124
5.7 Conclusions 126
Conclusion 129
References 131
8
9
Bibliography
Published
Lefebvre C., Barnhoorn A., van Hinsbergen D.J.J., Kaymakci N., Vissers R.L.M.,
Extensional denudation along a marble detachment fault zone from the northern Central Anatolian
massifs, Kaman, Central Turkey. Journal of Structural Geology 33, 1220-1236.
Submitted
Lefebvre C., Barnhoorn A., van Hinsbergen D.J.J., Kaymakci N., Vissers R.L.M.,
Reply to Genç and Yürür’s comments on: “Late Cretaceous extensional denudation along a marble
detachment fault zone in the Kırşehir massif near Kaman, Central Turkey”. Journal of Structural Geology
Lefebvre C., Peters K.M., Wehrens P.C, Brouwer F.M., van Hinsbergen D.J.J., Kaymakci N., Vissers
R.L.M., van Roermund H.L.M., Advokaat E.L., Hendriks B.W.H., Corfu F.,
P-T-t-d evolution and extensional exhumation history of a high-temperature complex (Hırkadağ block,
Central Anatolia). Lithos
Advokaat E.L., van Hinsbergen D.J.J., Lefebvre C., Kaymakci N., Vissers R.L.M., Hendriks B.W.H.,
Reconstruction of the post-middle Eocene Savçılı-Mucur fold-thrust zone near the Hırkadağ Block
(central Turkey) reveals the relict upper Cretaceous-Paleogene Ayhan supradetachment basin. Tectonics
Gülyüz E., Kaymakci N., Meijers M.J.M, van Hinsbergen D.J.J., Lefebvre C., Vissers R.L.M., Hendriks
B.W.H., Peynircoğlu A.A.,
Late Eocene synsedimentary folding of the Çiçekdağı basin, Central Turkey, during the final stages of the
Kırşehir block-Pontides collision. Journal of the Geological Society
In Preparation…
Lefebvre C., Meijers M.J.M, Kaymakci N., Peynircoğlu A.A., Langereis C.G., van Hinsbergen D.J.J.,
Reconstructing the geometry of central Anatolia during the late Cretaceous: Large-scale Cenozoic
rotations and deformation between the Pontides and Taurides. Earth and Planetary Science Letters
Lefebvre C., Chauvet A., Andréani M., Meresse F., LagabrielleY.,
Serpentinites tectono-metamorphic evolution in oceanic detachment fault systems: Contribution from
the study of the Inzecca ophiolite (Alpine Corsica). Geochemistry, Geophysics, Geosystems