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research My current researches are about geochronology, isotope geochemistry, zircon typology and chemistry of the Central Anatolian Granitoids (CAG). Petrology of the CAG is investigated on the basis of zircon typology, chemistry, U-Pb geochronology and Lu-Hf isotope studies. My partners are Prof. Dr. M. Cemal Göncüoglu and Dr. Fatma Toksoy-Köksal from Middle East Technical University, Department of Geological Engineering (Ankara, Turkey), Dr. Andreas Möller from University of Kansas, Department of Geology (Kansas, USA), Dr. Rolf L. Romer from GFZ German Research Centre for Geosciences (Potsdam, Germany), Dr. Dirk Frei from Ministry of the Environment, Geological Survey of Denmark and Greenland, Department of Geological Mapping (Copenhagen, Denmark), and Dr. Axel Gerdes from Institute für Geowissenschaften, Goethe Universität (Frankfurt, Germany). |
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In the scope of this research, I examined morphological and internal structural characteristics of zircon crystals (ca. 3000 crystals) from the granitoids of central Anatolia by using binocular microscope, Scanning Electron Microscope (SEM) and Cathodoluminescence (CL) imaging. We studied chemical features of the zircons by using Electron Microprobe and LA-SF-ICP-MS analyses. Moreover, we performed LA-SF-ICP-MS U-Pb dating and LA-MC-ICP-MS Lu-Hf isotope analyses from on the selected zircon crystals. The present part of the study covers the granitoids from the western margin of the Central Anatolian Crystalline Complex. |
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Fig.
1. Simplified geological map of the CACC (Modified after Bingöl,
1987; Göncüoglu et al., 1991; Toksoy-Köksal
et al., 2001; Düzgören-Aydin et
al., 2001; Boztug, 2000). Inset
map shows the main tectonic units in |
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SEM and CL images from some of the Central Anatolian Granitoids are presented below:
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SEM images of the
zircon crystals from the I-type (or hybrid-type) Terlemez (TE) (Aksaray)
and the Baranadag (BR) (Kirsehir) granitoids
(from Köksal et al., 2008, Mineralogy and Petrology, 93:185-211). |
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SEM images of the
zircon crystals from the A-type Çamsari (CS) (Kirsehir) granitoid.
(from Köksal et al., 2008, Mineralogy and Petrology, 93:185-211).
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SEM images of the
zircon crystals from the crustal sourced I-type Hisarkaya (HK) (Aksaray)
granitoid.
(from Köksal et al., 2008, Mineralogy and Petrology, 93:185-211).
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CL images of the
zircon crystals from the I-type (or hybrid-type) Terlemez (TE) (Aksaray)
and the Baranadag (BR) (Kirsehir) granitoids
Note that the multiple corrosion zones, suggested to be resulted from hybridization (from Köksal et al., 2008, Mineralogy and Petrology, 93:185-211). Abbreviations are; C: core, R: recrystallized domains or recrystallization patches, cr: corrosion (resorption or dissolution), T: thickened trace element rich band, M: metamictized domains, mi(?): possible melt inclusion, Ap: apatite inclusion. |
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CL images of the
zircon crystals from the A-type Çamsari (CS) (Kirsehir) granitoid.
Note that the extensive metamictization and the presence of inherited cores. (from Köksal et al., 2008, Mineralogy and Petrology, 93:185-211).
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CL images of the
zircon crystals from the crustal sourced I-type Hisarkaya (HK) (Aksaray)
granitoid.
Note that the significant change in zircon typology at the outer rims. (from Köksal et al., 2008, Mineralogy and Petrology, 93:185-211).
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| |HOME| | |INTRO| | |BASICS| | |TYPOLOGY| | |RESEARCH| | |TURKEY| | |ME| |
| zircon "the key mineral" | ||||||
| by Serhat KÖKSAL | ||||||
| Middle East Technical University /TURKEY |
| Central Laboratory / TIMS Lab | ||||||
| e-mail: skoksal@metu.edu.tr |
