Rb-Sr systematics of fault gouges from the North Anatolian Fault Zone (Turkey)

Mutlu, Halim, Uysal, I. Tonguc, Altunel, Erhan, Karabacak, Volkan, Feng, Yuexing, Zhao, Jian-Xin and Atalay, Ozan (2010) Rb-Sr systematics of fault gouges from the North Anatolian Fault Zone (Turkey). Journal of Structural Geology, 32 2: 216-221. doi:10.1016/j.jsg.2009.11.006

Author Mutlu, Halim
Uysal, I. Tonguc
Altunel, Erhan
Karabacak, Volkan
Feng, Yuexing
Zhao, Jian-Xin
Atalay, Ozan
Title Rb-Sr systematics of fault gouges from the North Anatolian Fault Zone (Turkey)
Journal name Journal of Structural Geology   Check publisher's open access policy
ISSN 0191-8141
Publication date 2010-02
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.jsg.2009.11.006
Volume 32
Issue 2
Start page 216
End page 221
Total pages 6
Editor Thomas G. Blenkinsop
W. M. Dunne
C. W. Passchier
Place of publication United Kingdom
Publisher Pergamon
Collection year 2010
Language eng
Subject C1
Abstract A combined mineralogical and Rb–Sr isotopic investigation was conducted on fault gouges from two locations at eastern part of the North Anatolian Fault Zone (NAFZ). The fault gouge samples contain no 2 M mica and consist chiefly of cryptocrystalline material, which is extensively altered to illitic clays (mixed-layered illite–smectite) and some carbonate minerals. The Rb–Sr isochrones of leachate, residue and untreated aliquots from various size fractions of samples yielded two different illite generations. The oldest illite authigenesis, which started at about 35.6 Ma might be inherited from pre-existing faults along the Tethyan suture zone. The authigenic illites from finer fractions correspond to an isochron age of 8.3 Ma, which is in agreement with the findings of previous works that may suggest a middle Miocene age for the initiation of the NAFZ. Our Sr isotope data indicate that the metamorphic fluids contain some mantle components and mobilised during fault movement.
Keyword North Anatolian Fault Zone
Fault gouge
Illitic clays
Rb-Sr dating
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Available online 24 November 2009.

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Created: Sun, 21 Mar 2010, 00:04:16 EST