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Apatite fission-track thermochronology of the Western Pontides (NW Turkey)

Published online by Cambridge University Press:  23 June 2011

WILLIAM CAVAZZA ,
ILARIA FEDERICI ,
ARAL I. OKAY  and
MASSIMILIANO ZATTIN
WILLIAM CAVAZZA*
Affiliation:
Dipartimento di Scienze della Terra e Geologico-Ambientali, Università di Bologna, Piazza di Porta San Donato 1, 40126 Bologna, Italy
ILARIA FEDERICI
Affiliation:
Dipartimento di Scienze della Terra e Geologico-Ambientali, Università di Bologna, Piazza di Porta San Donato 1, 40126 Bologna, Italy
ARAL I. OKAY
Affiliation:
Avrasya Yerbilimleri Enstitüsü ve Jeoloji Mühendisliği Bölümü, Maden Fakültesi, İstanbul Teknik Üniversitesi, Maslak, 34469 İstanbul, Turkey
MASSIMILIANO ZATTIN
Affiliation:
Dipartimento di Geoscienze, Università di Padova, Via G. Gradenigo 6, 35131 Padova, Italy
*
†Author for correspondence: william.cavazza@unibo.it
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Abstract

The results of apatite fission-track analyses of the Western Pontides of NW Turkey point to three discrete episodes of Cenozoic exhumation correlatable with major supraregional tectonic events. (1) Paleocene–early Eocene exhumation reflected the closure of the İzmir–Ankara ocean. (2) Late Eocene–earliest Oligocene exhumation was the result of renewed tectonic activity along the İzmir–Ankara suture. (3) Late Oligocene–early Miocene exhumation recorded the onset of northern Aegean extension. Samples collected north and south of the tectonic contact between the two terranes forming the Western Pontides (i.e. İstanbul and Sakarya terranes) record the same cooling events, suggesting that such terranes were amalgamated in pre-Cenozoic times.

Keywords

low-temperature thermochronologyexhumationcoolingİstanbul terraneSakarya terrane
Type
Rapid Communication
Information
Geological Magazine , Volume 149 , Issue 1 , January 2012 , pp. 133 - 140
Copyright
Copyright © Cambridge University Press 2011

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