eprintid: 43968
rev_number: 49
eprint_status: archive
userid: 608
dir: disk0/00/04/39/68
datestamp: 2010-10-15 16:26:28
lastmod: 2021-11-29 00:42:50
status_changed: 2012-10-02 09:19:07
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Brichau, S
creators_name: Ring, U
creators_name: Carter, A
creators_name: Monie, P
creators_name: Bolhar, R
creators_name: Stockli, D
creators_name: Brunel, M
title: Extensional faulting on Tinos island, Aegean sea, Greece: How many detachments?
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F57
keywords: Extensional faulting, Detachment, Core complex, Exhumation, Slip rate, Fission track thermochronology, (U-Th)/He dating
40Ar/39Ar dating, Aegean Sea
note: Copyright 2007 by the American Geophysical Union
abstract: Zircon and apatite fission track (ZFT and AFT) and (U-Th)/He, 40Ar/39Ar hornblende, and U-Pb zircon ages from the granites of Tinos Island in the Aegean Sea, Greece, suggest, together with published ZFT data, that there are three extensional detachments on Tinos. The Tinos granites crosscut the Tinos detachment. Cooling of the granites was controlled by the Livadi detachment, which occurs structurally above the Tinos detachment. Our U-Pb zircon age is 14.6 ± 0.2 Ma and two 40Ar/39Ar hornblende ages are 14.4 ± 0.4 and 13.7 ± 0.4 Ma. ZFT and AFT ages go from 14.4 ± 1.2 to 12.2 ± 1.0 Ma and 12.8 ± 2.4 to 11.9 ± 2.0 Ma. (U-Th)/He ages are from 10.4 ± 0.2 to 9.9 ± 0.2 Ma (zircon) and 11.9 ± 0.5 to 10.0 ± 0.3 Ma (apatite). All ages decrease northeastward in the direction of hanging wall transport on the Livadi detachment and age-distance relationships yield a slip rate of 2.6 (+3.3 / −1.0) km Ma−1. This rate is smaller than a published slip rate of 6.5 km Ma−1 for the Vari detachment, which is another detachment structurally above the Tinos detachment. Because of the different rates and because published ZFT ages from the footwall of the Vari detachment are ∼10 Ma, we propose that the Vari detachment has to be distinguished from the older Livadi detachment. We discuss various models of how the extensional detachments may have evolved and prefer a scenario in which the Vari detachment cut down into the footwall of the Livadi detachment successively exhuming deeper structural units. The thermochronologic ages demonstrate the importance of quantitative data for constraining localization processes during extensional deformation.
date: 2007-07-26
official_url: http://dx.doi.org/10.1029/2006TC001969
vfaculties: VMPS
oa_status: green
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_source: WoS-Lite
elements_id: 88073
doi: 10.1029/2006TC001969
lyricists_name: Carter, Andrew
lyricists_id: ACART78
full_text_status: public
publication: Tectonics
volume: 26
number: 4
article_number: TC4009
issn: 0278-7407
citation:        Brichau, S;    Ring, U;    Carter, A;    Monie, P;    Bolhar, R;    Stockli, D;    Brunel, M;      (2007)    Extensional faulting on Tinos island, Aegean sea, Greece: How many detachments?                   Tectonics , 26  (4)    , Article TC4009.  10.1029/2006TC001969 <https://doi.org/10.1029/2006TC001969>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/43968/1/2006TC001969.pdf