Timing of the Amorgos detachment system and implications for detachment faulting in the southern Aegean Sea, Greece

Ring, Uwe, Thomson, Stuart N. and Rosenbaum, Gideon (2009) Timing of the Amorgos detachment system and implications for detachment faulting in the southern Aegean Sea, Greece. Extending a Continent: Architecture, Rheology and Heat Budget, 321 169-178. doi:10.1144/SP321.8


Author Ring, Uwe
Thomson, Stuart N.
Rosenbaum, Gideon
Title Timing of the Amorgos detachment system and implications for detachment faulting in the southern Aegean Sea, Greece
Journal name Extending a Continent: Architecture, Rheology and Heat Budget   Check publisher's open access policy
ISSN 0305-8719
ISBN 0305-8719
Publication date 2009-01-01
Year available 2009
Sub-type Article (original research)
DOI 10.1144/SP321.8
Volume 321
Start page 169
End page 178
Total pages 10
Editor U. Ring
B. Wernicke
Place of publication Greece
Publisher Geological Society of London, Special Publications
Collection year 2010
Language eng
Subject 040313 Tectonics
970104 Expanding Knowledge in the Earth Sciences
C1
Abstract We present apatite and zircon fission-track (AFT and ZFT) ages from the Amorgos detachment system in the Aegean Sea, Greece. The Amorgos detachment system consists of a basal and an upper detachment. The lower Amorgos detachment occupies the same tectonic position as the regionally important large-magnitude Cretan detachment and therefore can provide improved constraints on the evolution of the latter. AFT ages from the footwalls of both detachments show that detachment-related cooling occurred in the early Miocene, coeval with an important phase of cooling in the footwall of the Cretan detachment on Crete. We interpret the footwall AFT ages to indicate an early Miocene age of movement on the Amorgos detachments, essentially simultaneously with slip on the Cretan detachment. ZFT ages from rocks above the lower Amorgos detachment are not reset indicating that metamorphic temperatures during the Tertiary Hellenic orogeny did not exceed c. 300 °C significantly. We discuss a model in which top-to-the-north movement on the Cretan/Amorgos detachment commenced in the early Miocene. Soon after the inception of the Cretan/Amorgos detachment, top-to-the-south movement on the South Cyclades shear zone deformed the latter and brought the Amorgos detachment into a higher crustal position.
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
2010 Higher Education Research Data Collection
 
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Created: Thu, 22 Apr 2010, 03:21:16 EST by Tracy Paroz on behalf of School of Earth Sciences