Whole rock geochemistry zircon U Pb geochronology and Lu Hf isotope systematics of the Çangaldağ Pluton Central Pontides Turkey

Çimen, Okay
Göncüoğlu, Mehmet Cemal
Sayıt, Kaan
Simonetti, Antonio
The Central Pontides include several granitoid complexes, which are predominantly PermoCarboniferous and Middle Jurassic in age. Currently, there is no geochemical and radiometric age data from one of the largest igneous bodies, namely the Çangaldağ Pluton to the northeast of the Çangaldağ Complex. The pluton intrudes the Çangaldağ Volcanic Complex and mainly comprises non-metamorphic diorite, dacite porphyry, and lesser amount of granitic rocks. The dioritic rocks are surrounded by dacite porphyries, which indicate a zoned nature (mafic core with felsic rim) of the complex. Petrographically, the diorites consist mainly of plagioclase, amphibole and biotite. In contrast, the dacite porphyries display porphyritic texture with quartz, K-feldspar and plagioclase phenocrysts within a fine-grained groundmass. The dioritic rocks are cut by granitic rocks, which are composed predominantly of quartz, K-feldspar, plagioclase, biotite and muscovite. Geochemically, various rock types from this pluton exhibit subalkaline, calc-alkaline features and are akin to volcanic arc magmatics displaying LILE/HFSE enrichment coupled with Nb depletion. The remaining data suggest derivation primarily by partial melting of an amphibolitic source. Moreover, the diorites and dacite porphyries exhibit geochemical characteristics of I-type granites, whereas the granitic rocks show typical features of S-type granites. In-situ U-Pb dating of zircons from dacite porphyry and granite samples indicate ages of 161.4 ± 5.3 Ma and 168.3 ± 2.1 Ma, respectively. In addition, corresponding in-situ 176Hf/ 177Hf initial ratios are 0.28287 ± 0.00004 and 0.28279 ± 0.00004 for the dacite porphyry and granite samples, respectively. These results support their generation in an arc system with the involvement of a subduction-modified mantle source. TDM model ages vary between 624 and 639 Ma and suggest that the magmatism associated with the Çangaldağ Pluton may have involved partial melting of Neoproterozoic crustal rocks, which are common in Gondwana-derived terranes. The geochemical, Hf isotope and geochronological data reported here confirm the presence of an arc system during the Middle Jurassic in the Central Pontides, and propose that the Çangaldağ Pluton formed within an island arc during northward subduction of the Intra-Pontide Ocean.


Whole rock geochemistry, Zircon U-Pb and Hf isotope systematics of the Cangaldag Pluton: Evidences for Middle Jurassic Continental Arc Magmatism in the Central Pontides, Turkey
ÇİMEN, OKAY; Göncüoğlu, Mehmet Cemal; Simonetti, Antonio; Sayıt, Kaan (2017-10-01)
The Central Pontides (Turkey) includes several igneous complexes, which are predominantly PermoCarboniferous and Middle Jurassic in age. The Cangaldag Pluton is one of the largest igneous bodies located in the northern Central Pontides, whose age and tectono-magmatic evaluation is important to constrain the geological evolution of the Northern Neotethys. The pluton tectonically overlies the cangaldag Metamorphic Complex, which represents an arc-back-arc complex of Middle Jurassic age. The Cangaldag Pluton c...
Zircon U Pb Geochronology Hf Isotopes and whole rock geochemistry of the meta magmatic rocks from the Çangaldağ Complex Central Pontides Turkey
Çimen, Okay; Göncüoğlu, Mehmet Cemal; Simonetti, Antonio; Sayıt, Kaan (2016-04-11)
The Central Pontides in northern Turkey form an imbricated structural complex that consists of a number of variably metamorphic oceanic assemblages between the Istanbul-Zonguldak and Sakarya Composite terranes. The Çangaldağ Complex is a member of this unit and occurs as an E-W trending 30 km long and 15 km wide belt to the north of the Kastamonu-Boyabat Tertiary basin. The Çangaldağ Complex consists predominantly of variably deformed and metamorphosed igneous rocks ranging from felsic to mafic in compositi...
High-resolution sequence stratigraphic correlation in the Upper Jurassic (Kimmeridgian)-Upper Cretaceous (Cenomanian) peritidal carbonate deposits (Western Taurides, Turkey)
Altıner, Demir; Yılmaz, İsmail Ömer; Bayazitoglu, M; Gaziulusoy, ZE (1999-01-01)
Upper Jurassic (Kimmeridgian)- Upper Cretaceous (Cenomanian) inner platform carbonates in the Western Taurides are composed of metre-scale upward-shallowing cyclic deposits (parasequences) and important karstic surfaces capping some of the cycles. Peritidal cycles (shallow subtidal facies capped by tidal-Aat laminites or fenestrate limestones) are regressive- and transgressive-prone (upward-deepening followed by upward-shallowing facies trends). Subtidal cycles are of two types and indicate incomplete shall...
Upper Cretaceous volcaniclastic complexes and calcareous plankton biostratigraphy in the Western Pontides, NW Turkey
Boehm, Katharina; Wagreich, Michael; Wolfgring, Erik; Tuysuz, Okan; Gier, Susanne; Yılmaz, İsmail Ömer (2019-01-01)
This study describes and interprets Upper Cretaceous volcaniclastics interbedded with hemipelagic to pelagic limestones, marls, and turbidites from the Western Pontides, northwestern Turkey. The Derekey Formation, the Unaz Formation (red pelagic limestone unit), and the Cambu Formation can be distinguished, overlain by the turbiditic Akveren Formation. Biostratigraphic ages from the predominantly volcaniclastic Derekoy Formation indicate Turonian (Dicarinella concavata planktonic foraminifera zone, CC13/UC8...
Fusulinoidean faunas from the Upper Carboniferous and Lower Permian platform limestone in the Hadim area, Central Taurides, Turkey
Kobayashi, Fumio; Altıner, Demir (2008-07-01)
Sixty-one species assignable to 31 genera of Late Carboniferous and Early Permian fusulinoideans were distinguished from the Hadim area, central Taurides, Turkey. They are biostratigraphically divided into eleven zones in ascending order: Protriticites variabilis, Montiparus urnbonoplicatus and Schwageriniformis schwageriniformis zones in the Kasimovian; the figulites A formosus, Daixina asiatica and Rugosofusulina sp. A zones in the Gzhelian; Paraschwagerina sp. and Dutkevichia complicata zones in the Asse...
Citation Formats
O. Çimen, M. C. Göncüoğlu, K. Sayıt, and A. Simonetti, “Whole rock geochemistry zircon U Pb geochronology and Lu Hf isotope systematics of the Çangaldağ Pluton Central Pontides Turkey,” 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/74514.