Intrusive products of H2O and CO2 rich alkaline melt (Karakoç Magmatic Association): Significance in tethyan realm, Turkey

The Karakoç Magmatic Association (KMA) within the Central Anatolian Crystalline Complex (CACC) consists of ultramafic cumulates, layered gabbros and diorite. The KMA intruded the carbonate dominated upper part of the CACC as a network and includes host rock xenoliths. The KMA is characterized by abundance of Ca-rich phases (green diopside (Mg#=57-93), pargasite (Mg#=41-86), plagioclase (An=91-95), scapolite (Me=42-92), calcite) and Ca-free minerals (phlogopite (Mg#=71-76), alkali-feldspar). The accessories are apatite, sphene, rutile, zircon, and Fe-oxides. Scapolite and calcite are in textural equilibrium with surrounding silicates, inferring magmatic origin. The KMA, with low SiO2 and high CaO, Na2O, K2O, H2O, CO2 contents, has high-K alkaline nature. The rocks display positive Th, U, K, Pb, P and negative Nb, Ta, Ti, Zr anomalies on the primitive mantle normalized spider diagrams. The rocks enriched in REE (REE=179-673) show sloped pattern from LREE to HREE. The KMA is characterized by low εNd(T) values [(-2.2) – (-6.2)] and moderate to high initial 87Sr/86Sr isotope ratios (0.707262 – 0.707864). Geochemically, the KMA is strongly comparable with the Late Cretaceous monzonitic I- and A-type granitoids, and also shows similarities to the Late Cretaceous to Lower Tertiary alkaline and ultrapotassic volcanic rocks within the CACC. The KMA is assumed to be product of a hydrous mafic magma generated in a post-collisional extensional setting during the Late Cretaceous. Release of CO2 in an extensional setting is likely to cause extensive assimilation of crustal carbonate in liquid state and increase in alkalinity and desilicification of the host magm
IESCA 2019 : International Earth Science Colloquium On the Aegean Region , October 7-11 2019


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Koksal, S; Göncüoğlu, Mehmet Cemal; Floyd, PA (2001-08-01)
The Idis Dagi Igneous Complex is one of a number of late-stage plutonic bodies within the Central Anatolian Crystalline Complex. It intrudes Paleozoic-Mesozoic metamorphic basement rocks and Late Cretaceous granitoids. The complex comprises mainly quartz syenites and alkali-feldspar quartz syenites known as the Idis Dagi Syenitoids.
Eocene post collisional volcanism in the Central Anatolian Crystalline Complex Turkey Petrology and geodynamic significance
Geneli, Fatma; Göncüoğlu, Mehmet Cemal; Lassıter, J; Toksoy Köksal, Fatma (null; 2010-09-04)
In the Central Anatolian Crystalline Complex (CACC) the Late Cretaceous postcollisional granitic magmatism is followed by Eocene extension, resulting in formation of roughly E-W trending transtensional basins. The volcanic rocks, mainly submarine lava flows and subareal domes are concentrated along these Middle Eocene (Bartonian) basins. The volcanic rocks are basic to intermediate and are classified as basalt, basaltic andesite and rarely alkali basalt and trachy-andesite. Petrographically they are general...
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Kadioglu, Yk; Ates, A; Güleç, Nilgün Türkan (1998-03-01)
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Alternating radiolarian cherts and mudstones associated with basaltic lavas occur in a olistolith within the Late Cretaceous Bornova Flysch in W Anatolia. Cherts yielded diverse and moderately preserved, Nassellaria-dominated radiolarian faunas of late Bathonian-early Callovian age. Associated volcanic rocks are geochemically classified as remnants of oceanic seamounts. This is so far the first late Middle Jurassic age from the crust of the Neotethyan Izmir-Ankara Ocean in W Anatolia, and suggests that its ...
Pore network modeling of multiphase flow in fissured and vuggy carbonates
Erzeybek, S.; Akın, Serhat (2008-11-10)
Carbonate reservoirs have more complex structures than silicate reservoirs because of depositional and digenetic features. Secondary porosity enhancements due to fracturing or dissolution processes result complex porosity systems and thus complex flow patterns. Carbonates may contain not only matrix and fracture but also the vugs and cavities that are irregular in shape and vary in size from millimeters to centimeters in diameter. Although many of these vugs appear to be isolated from fractures, the mechani...
Citation Formats
F. Toksoy Köksal, “Intrusive products of H2O and CO2 rich alkaline melt (Karakoç Magmatic Association): Significance in tethyan realm, Turkey,” presented at the IESCA 2019 : International Earth Science Colloquium On the Aegean Region , October 7-11 2019, Izmir, Turkey, 2012, Accessed: 00, 2021. [Online]. Available: