Mineralogic and organic responses to stratigraphic irregularities: an example from the Lower Paleozoic very low-grade metamorphic units of the Eastern Taurus Antochthon, Turkey

Bozkaya, O
Yalcin, H
Göncüoğlu, Mehmet Cemal
The paleogeographic and diagenetic-metamorphic evolution of Lower Paleozoic (meta-) sedimentary rocks in the Eastern Taurus Autochthon were studied by means of petrographic and XRD methods. Parameters such as illite crystallinity index, b(0) and % 2M(1) proportion of K-white micas are characterized by an increase in grade from diagenesis at the top to epizone at the bottom. Organic data show a good correlation with phyllosilicate crystal chemical parameters. Three main zones and five sub-zones with distinct breaks at boundaries were distinguished throughout the Lower Paleozoic series. These boundaries seem to correspond to stratigraphic gaps, unconformities and/or irregularities that may have important implications regarding as yet unknown deformation events. The data indicate that the Eastern Taurus Autochthonous Unit was initially not only affected by typical sedimentary burial, but also preserved vestiges of an earlier regional thermal and/or deformational history. Alpine tectonic movements and related deformations caused but limited textural changes, thus did not completely erase some fingerprints of the Paleozoic mineralogic and organic transformations. The metamorphic evolution and relationships between the mineralogic, textural and organic properties and stratigraphic/metamorphic discontinuities in the Lower Paleozoic succession are controlled by diagenetic-metamorphic reactions and detrital input related to orogenic activity in the hinterland.


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Gediz Graben is a continental extensional basin filled with Neogene sediments. Its margins are controlled by active ~EW-trending fault systems with major system, in terms of total offset and duration of activity, located along the southern margin. The graben evolved as a half graben by the activity of the southern margin during the entire Miocene. Then, the northern margin-bounding structure initiated by PlioQuaternary to form the current configuration of the graben with an inherited asymmetry. The southern...
Tectonics and Magmatism in Turkey and the Surrounding Area
Bozkurt, Erdin; Piper, John D A (Geological Society of London, 2020-01-01)
The volume is divided into five sections: Tethyan evolution, Neotethyan ophiolites, post-Tethyan basin evolution, neotectonics and igneous activity. The first two sections deal with Tethyan oceans, whose growth and subsequent closure dominated the geodynamic framework in the Mesozoic and Cenozoic. The subsequent sections deal with more recent geological developments from the Balkan Peninsula in the west to the Transcaucasus in the east that followed consumption of the Tethyan oceans. There is a broad mix of...
Citation Formats
O. Bozkaya, H. Yalcin, and M. C. Göncüoğlu, “Mineralogic and organic responses to stratigraphic irregularities: an example from the Lower Paleozoic very low-grade metamorphic units of the Eastern Taurus Antochthon, Turkey,” SCHWEIZERISCHE MINERALOGISCHE UND PETROGRAPHISCHE MITTEILUNGEN, pp. 355–373, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53379.