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    Mass and volume change calculations of Masatdagi (Alanya-Antalya) bauxites from southern Turkey
    (MAIK NAUKA/INTERPERIODICA/SPRINGER, 2005) Temur, S; Orhan, H; Kurt, H
    [Abstract not Available]
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    Palaeozoic deformation and magmatism in the northern area of the Anatolide block (Konya), witness of the Palaeotethys active margin
    (BIRKHAUSER VERLAG AG, 2004) Eren, Y; Kurt, H; Rosselet, F; Stampfli, GM
    The study area. located north of Konva (Central Turkey), is composed of Silurian to Cretaceous metamorphosed rocks. The lower unit of the oldest formation (Silurian-Early Permian) is mostly made up of Silurian-Early Carboniferous metacarbonates. These rocks pass laterally and vertically to Devonian-Early Permian series having continental margin, shallow water and pelagic characteristics. They are intruded or juxtaposed to different kinds of metamagmatic rocks. which show MORB. continental arc and within plate characteristics. The Palaeozoic units are covered unconformably by Triassic-Cretaceous metasedimentary units. All these rocks are overthrusted by Mesozoic ophiolites. The Palaeozoic sequence can be seen as a northern Palaeotethys passive, then active margin. The northward subduction of the Palaeotethys ocean during the Carboniferous-Triassic times, induced the development of a magmatic arc and fore-arc sequence (Carboniferous-Permian). Before the Early Triassic (?Late Permian) time. the fore-arc sequence was uplifted above sea level and eroded. The Triassic sequences are regarded as marking the onset of back-arc opening and detachment of the Anatolian Konya block from the active Eurasian margin. Finally. a suture zone formed during the Carman between the Konya region and the Menderes-Tauride Cimmerian block due to the closing of Palaeotethvs. This geodynamic evolution can be correlated with the evolution of the Karaburun sequence in western Turkey.
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    Petrography and geochemistry of the Gumusler (Nigde) area gneisses and amphibolites, Central Turkey
    (A A BALKEMA PUBLISHERS, 1999) Kurt, H; Bas, H; Arslan, M
    The objective of this study is to investigate the petrography and geochemistry of the Gumusler (Nigde) area gneisses and amphibolites, Central Turkey. Amphibolites and gneisses are commonly very difficult to determine in areas whether sedimentary or igneous origin. The Gumusler rocks are interpreted to be of igneous origin based up on Niggli trends and trace element characteristics. The gneisses were mainly calc-alkaline whereas amphibolites were mainly tholeiitic in character, and both of them reflect volcanic are setting precursor. Field relationships and chemical data suggest that the amphibolites formed as metamorhism of basic tuff wheras gneisses likely from acidic tuff and related rocks.