Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/103874
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Type: Conference paper
Title: Evolution of the Lycian Allochthon, western Turkey, as a north-facing Late Palaeozoic to Mesozoic rift and passive continental margin
Author: Collins, A.S.
Robertson, A.H.F.
Citation: Geological Journal, 1999, vol.34, iss.1-2, pp.107-138
Publisher: Wiley
Issue Date: 1999
ISSN: 0072-1050
1099-1034
Conference Name: International Turkish Geology Symposium (31 Aug 1998 - 4 Sep 1998 : Ankara, TURKEY)
Statement of
Responsibility: 
Alan S. Collins and Alastair H. F. Robertson
Abstract: Regional tectono-stratigraphic analysis allows widely distributed outcrops of mainly Mesozoic sedimentary rocks within the Lycian Allochthon, SW Turkey, to be correlated and placed within four regionally developed thrust sheets, the Karadag Thrust Sheet (lowest), the Teke Dere Thrust Sheet, the Koycegiz Thrust Sheet (highest), and the Yavuz Thrust Sheet. The Karadag Thrust Sheet records Late Carboniferous, Lower and Upper Permian continental shelf/ lagoonal deposition. The overlying Teke Dere Thrust Sheet includes a rift succession of Late Permian age that was subaerially exposed during much of the Triassic; a marine transgression followed in the Early Jurassic succeeded by subsidence that formed a continental slope from Middle Jurassic to Palaeocene times. The overlying Koycegiz Thrust Sheet records Upper Triassic oceanic crust (along a rifted margin), overlain by a Lower Jurassic carbonate platform; this then subsided to form a continental slope that survived until Late Cretaceous times. The Lycian Allochthon is restored as a north-facing Mesozoic rift and passive margin taking account of structural evidence indicating southward thrust emplacement and comparisons of sedimentary successions. Mainly deep-water sediments of Triassic to Late Cretaceous age, preserved as blocks within melange units above the Lycian Thrust Sheets (Layered Tectonic Melange and Ophiolitic Melange), are interpreted as deep-water sediments deposited on Mesozoic (Neotethyan) oceanic crust. Subduction of the ocean basin proceeded from north to south, beginning with accretion of oceanic-derived melange and disrupted thrust sheets. Debris was shed into a continentward-migrating flexural foredeep, initially located along the distal edge of the continental margin in Campanian-Maastrichtian times; this foredeep then propagated southwards in stages over more proximal continental crust (including an intra-platform basin). The first main stage of southeastward propagation was in Palaeocene and Eocene times followed by a second stage in Oligocene-Miocene times. The Lycian Allochthon was finally emplaced over the most proximal (southeasterly) foredeep (i.e. the Kas basin) in Late Miocene time.
Keywords: Neotethys; rift; passive margin; Lycian Thrust Sheets; thrust emplacement
Description: Special Issue: Advances in Turkish Geology, Part I
Rights: Copyright © 1999 John Wiley & Sons, Ltd.
DOI: 10.1002/(SICI)1099-1034(199901/06)34:1/2<107::AID-GJ817>3.0.CO;2-L
Published version: http://dx.doi.org/10.1002/(sici)1099-1034(199901/06)34:1/2%3C107::aid-gj817%3E3.0.co;2-l
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