Geochemistry and Petrology of the Kösedağ metavolcanic rocks Sakarya Composite Terrane Northern Turkey

Date

2015-08-21

Author

Berber, Faruk
Göncüoğlu, Mehmet Cemal
Sayıt, Kaan

Metadata

Show full item record

Item Usage Stats

178
views

0
downloads

Central Pontides in Northern Turkey is a key area, comprising variably metamorphosed and deformed low-grade metavolcanic rocks. In this study we report the geochemical characteristics of the Kösedağ metavolcanics (KMV), and infer their tectonomagmatic evolution. The KMV include blastomylonitic volcanic rocks covered by the Cretaceous clastics and carbonates. The chemical composition of the KMV ranges from basalt, andesite to dacite. The evolved magma compositions reflect fractionation of plagioclase, Fe-Ti oxides and ferromagnesian minerals. Based on immobile trace element systematics, the KMV are subdivided into two groups as Type-1 and Type-2. Both types are enriched in Th and LREE relative to HFSE and display negative Nb anomalies. Type-1 exhibits depletion in P, whereas Type-2 is characterized by depletion in Zr and Hf. Combined with their subduction-related characteristics, the relatively high Zr/Nb ratios (Type 1: 38.1-52.9, Type-2: 21.8-41.2) of the KMV suggest involvement of a depleted mantle source(s) which has been fluxed by slabderived components. The KMV appear to have been generated from a mantle source(s) in the stability field of spinel, rather than garnet, owing to the low Sm/Yb ratios of the volcanics (0.9-1.2). The KMV rocks exhibit strong correlation with the modern oceanic arcs, such as Greater Antilles and Mariana.

URI

https://hdl.handle.net/11511/70756
https://goldschmidt.info/2015/program/programViewAuthor?authorId=721

Conference Name

Goldschmidt Conference 2015, 16 - 21 Ağustos 2015

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Geochemistry of the metavolcanic rocks from the Cangaldag Complex in the Central Pontides: implications for the Middle Jurassic arc-back-arc system in the Neotethyan Intra-Pontide Ocean Cimen, Okay; Göncüoğlu, Mehmet Cemal; Sayıt, Kaan (2016-01-01) The Cangaldag Complex in northern central Turkey is one of the main tectonic units of the Central Pontide Structural Complex that represents the remains of the poorly known Intra-Pontide branch of the Neotethys. It comprises low-grade metamorphic rocks of intrusive, extrusive, and volcaniclastic origin displaying a wide range of felsic to mafic compositions. Petrographically the complex consists of basalts-andesites-rhyodacites and tuffs with minor amount of gabbros and diabases. On the basis of geochemistr...
GEOCHEMISTRY AND PETROGENESIS OF THE ARC-RELATED KÖSDAĞ METAVOLCANICS, SOUTHERN CENTRAL PONTIDES, NORTHERN TURKEY Berber, Faruk; Sayıt, Kaan; Department of Geological Engineering (2021-12-27) The Kösdağ Metavolcanics (KM) in the southern Central Pontides crops out between the Izmir-Ankara-Erzincan Suture Zone (IAESZ) in the south and the Sakarya Composite Terrane in the north. The unit is represented by a low-grade metamorphic assemblage including meta-basics, meta-intermediates, and meta-felsics, interlayered with recrystallized limestone, mudstone, and chert. While the unit is bounded to the north by the North Anatolian Fault Zone (NAFZ), the Dikmen Formation stratigraphically overlie the unit...
Geochemistry of mafic rocks of the Karakaya complex, Turkey: evidence for plume-involvement in the Palaeotethyan extensional regime during the Middle and Late Triassic Sayıt, Kaan; Göncüoğlu, Mehmet Cemal (2009-03-01) The Karakaya Complex within the Early Mesozoic Cimmerian Orogeny in northern Turkey represents the remnants of the Palaeotethys. It includes slivers and/or mega-blocks of slightly metamorphic basic volcanic rocks associated with fossiliferous sediments as well as hypabyssal and intrusive rocks with basaltic-andesitic to ultramafic compositions. They display two distinct compositional groups; namely alkaline and variably tholeiitic. The alkaline basalt samples are more akin to oceanic-island basalts (OIB) wi...
GEOCHEMISTRY AND TECTONIC SIGNIFICANCE OF AUGEN GNEISSES FROM THE SOUTHERN MENDERES MASSIF (WEST TURKEY) Bozkurt, Erdin; PARK, RG (1995-05-01) The protoliths of mylonitized augen gneisses exposed in the southern sector of the Menderes Massif (West Turkey) are calc-alkaline, peraluminous, S-type, late- to post-tectonic tourmaline- and garnet-bearing, two-mica leucogranites. They cut and post-date the fabrics of the 'main Menderes metamorphism' which took place between the early Eocene and early Oligocene and intrude metamorphic basement rocks comprising the so-called 'Palaeozoic schist envelope' of the massif. They are themselves cut by an extensiv...
Geochemistry and Tectonic Implications of Leucogranites and Tourmalines of the Southern Menderes Massif, Southwest Turkey Bozkurt, Erdin; Mittwede, Steven K.; Ottley, Christopher J. (Informa UK Limited, 2006-10) Granitoid rocks of the southern Menderes Massif, SW Turkey include widespread possibly Ediacaran high-grade granitic orthogneisses and younger (Tertiary) sheets, sills and/or dikes of variably deformed tourmaline-bearing leucogranites. The latter are confined to the immediate footwall of the regional-scale ductile southern Menderes shear zone. Although both sets of granitoid rocks are essentially calc-alkaline and peraluminous, the syn- to post-collisional tourmaline-bearing leucogranites are chemically dis...

Citation Formats

F. Berber, M. C. Göncüoğlu, and K. Sayıt, “Geochemistry and Petrology of the Kösedağ metavolcanic rocks Sakarya Composite Terrane Northern Turkey,” presented at the Goldschmidt Conference 2015, 16 - 21 Ağustos 2015, Prague, Czech Republic, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70756.