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Title: Tectonic evolution of the Palaeotethys Ocean in NW Turkey
Author: Pickett, Elizabeth Anne
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1994
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NW Turkey displays a series of pre-Jurassic tectonostratigraphic units which are critical to our understanding of the western portion of the sutured Palaeotethys Ocean and the processes involved in its tectonic evolution. During this study, sedimentological, structural and lithological data were collected from NW Turkey, with the aim of elucidating the Late Palaeozoic-Early Mesozoic history of the Palaeotethys Ocean. These units are: (a) ultrabasic slabs with metamorphic soles (Denizgören/Lesbos Ophiolites) emplaced onto Upper Permian carbonate platform units (e.g. Karadaǧ Unit), (b) amphibolites and gneisses (Kazdaǧ Massif), (c) Permo-Triassic volcano sedimentary units (Karakaya Complex) with an Upper Triassic-Jurassic sedimentary cover (Bayrköy/Hallar Formations and Bilecik Limestone), (d) thick Triassic carbonate platforms overlying mélange units (Chios and Karaburun sequences). A major focus of this study is the Karakaya Complex, a deformed, low-grade metamorphic assemblage of oceanic origin which comprises a SE-dipping stack of distinct tectonostratigraphic units (Nilüfer, Ortaoba, Kalabak and Çal Units), here interpreted as a Palaeotethyan accretionary complex. The Nilüfer Unit comprises spilites, volcaniclastics and limestone. The spilites have within-plate geochemical signatures and this, together with the absence of terrigenous material, leads to an interpretation as a seamount sequence. The tectonically overlying Ortaoba Unit comprises basalt-chert-turbidite sequences.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available