Kinematic history of a reactivated oceanic suture; the Mamonia Complex suture zone, SW Cyprus

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doi: 10.1144/jgs.157.6.1107
Authors:Bailey, W. R.; Holdsworth, R. E.; Swarbrick, R. E.
Author Affiliations:Primary:
University of Durham, Department of Geological Sciences, Durham, United Kingdom
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, Vol.157(Part 6), p.1107-1126. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:2000
Note:In English. 48 refs.; illus., incl. block diag., sects., geol. sketch maps
Summary:The Mamonia Complex Suture Zone in SW Cyprus marks an arcuate tectonic suture between an Upper Cretaceous, oceanic microplate of supra-subduction zone origin (Troodos Complex) and a deformed Triassic passive margin sequence (Mamonia Complex). Mapping of the serpentinite-filled fault zones that define the suture zone, combined with microstructural studies of its constituent fault rocks, has revealed evidence of three main tectonic events of Upper Cretaceous age: (1) high temperature (c. 600°C), transform-related, dextral strike-slip and localized metamorphism of Mamonia Complex units (c. 90-83 Ma); (2) retrograde hydration (<400°C) during dextral transtension associated with the rotation of the Troodos microplate and the shallow-level emplacement of serpentinite (c. 83-73 Ma); (3) regional contractional reactivation at low temperatures, which ceased by the latest Maastrichtian (c. 65 Ma). The present day structural geometries are interpreted as the result of Maastrichtian contractional reactivation of a pre-existing, steep and irregular structural architecture that formed during transtension. The resultant orientation of finite strain axes and thrust displacements display a radial distribution, documenting near fault normal contraction along the whole length of the arcuate suture zone. This pattern of displacements suggests a model whereby the Troodos microplate impinged on the Mamonia Complex during westerly- to southwesterly-directed plate motion, contractionally reactivating the mechanically weak suture zone.
Subjects:Igneous rocks; Kinematics; Metaigneous rocks; Metamorphic rocks; Metasomatic rocks; Ophiolite; Peridotites; Plutonic rocks; Reactivation; Serpentinite; Suture zones; Tectonics; Troodos Ophiolite; Ultramafics; Asia; Cyprus; Middle East; Mamonia Complex; Southwestern Cyprus
Abstract Numbers:01M/763
Record ID:2001026137
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
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