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Full-Text Articles in Physical Sciences and Mathematics
Sr And Nd Isotopic Characteristics Of Some S-, I- And A-Type Granitoids From Central Anatolia, Serhat Köksal, M. Cemal Göncüoğlu
Sr And Nd Isotopic Characteristics Of Some S-, I- And A-Type Granitoids From Central Anatolia, Serhat Köksal, M. Cemal Göncüoğlu
Turkish Journal of Earth Sciences
The petrogenesis of some Late Cretaceous S-, I- and A-type granitoids in the Aksaray and Kırşehir regions of Central Anatolia is investigated by means of whole-rock Sr and Nd isotope data with supplementary field, petrographic, and whole-rock geochemical studies. The S-type Central Anatolian granitoids (Sinandı and Namlıkışla) have calc-alkaline peraluminous characteristics and show LILE and LREE enrichment. The I-type Central Anatolian granitoids (Borucu, Terlemez, Hisarkaya, Baranadağ), on the other hand, are calc-alkaline (excepting the alkaline Baranadağ sample) and metaluminous or slightly peraluminous with LILE and LREE enriched patterns and variable Eu-anomalies. Additionally, the A-type Çamsarı granitoid is alkaline and metaluminous …
Crustal Structure Of The Eastern Part Of Central Anatolia (Turkey), Hüseyi̇n Yilmaz, Sevda Özel
Crustal Structure Of The Eastern Part Of Central Anatolia (Turkey), Hüseyi̇n Yilmaz, Sevda Özel
Turkish Journal of Earth Sciences
This study aims to examine crustal structure in the eastern part of central Anatolia using the magnetotelluric (MT) method. MT data have been collected from 37 stations along a north-south 220 km profile crossing in succession the Tokat Massif (Pontide basement), the Ankara-Erzincan Suture Zone, the Kırşehir Massif, the Pınarbaşı-Divriği Ophiolitic Belt and the Tauride-Anatolide Belt. Data were modelled to derive a geo-electrical model using 2-dimensional inverse techniques. Low resistivity values (981 Ohm.m) coincide with the southern part of the Pontide Magmatic Arc, the Kırşehir Block and the Tauride-Anatolide Belt and are interpreted as upper crust of igneous and metamorphic …
Palaeoecology Of Coal-Bearing Eocene Sediments In Central Anatolia (Turkey) Based On Quantitative Palynological Data, M. Serkan Akki̇raz, Mi̇ne Sezgül Kayseri̇, Funda Akgün
Palaeoecology Of Coal-Bearing Eocene Sediments In Central Anatolia (Turkey) Based On Quantitative Palynological Data, M. Serkan Akki̇raz, Mi̇ne Sezgül Kayseri̇, Funda Akgün
Turkish Journal of Earth Sciences
In this study, the lignite-bearing Yoncalı formation between Yozgat and Sorgun, in central Anatolia has been palynologically examined. Based on 37 outcrop samples, quantitative palynological studies recognized 64 genera and 136 palynoflora species in the palynological assemblage, which indicated a Middle-?Late Eocene age. This paper also presents a quantitative palaeovegetation and palaeoclimate reconstruction for the Middle-?Upper Eocene coal occurrences of Central Anatolia on the basis of palynomorph assemblages. The diversified floral and ecological characteristics of the pollen taxa indicates that the Middle-?Upper Eocene formations in central Anatolia were characterized by the presence of a complex mangrove swamp with contributions by …
Punctuated Exhumation And Foreland Basin Formation And Infilling In (Circum)-Central Anatolia (Turkey) Associated With The Neo-Tethyan Closure, Durmuş Boztuğ, Haluk Temi̇z, Raymond Jonckheere, Lothar Ratscbacher
Punctuated Exhumation And Foreland Basin Formation And Infilling In (Circum)-Central Anatolia (Turkey) Associated With The Neo-Tethyan Closure, Durmuş Boztuğ, Haluk Temi̇z, Raymond Jonckheere, Lothar Ratscbacher
Turkish Journal of Earth Sciences
Apatite fission-track data indicate that the (circum)-central Anatolian granitoids (CAG) were exhumed during successive shortening phases following continent-continent collisions within the Neo-Tethyan domain in central and east-central Anatolia. The Early to Middle Paleocene exhumation of the CAG is thought to be a consequence of the collision between the Tauride-Anatolide platform (TAP) and the Eurasian plate (EP) following the consumption of the İzmir-Ankara-Erzincan strand of the northern Neo-Tethys. The Oligocene exhumation documented by the data for the Kösedağ pluton in east-central Anatolia is considered to be related to the compression due to continuing convergence between the EP and TAP which seems …