Trace element and Sr-Nd-Hf-Pb isotopic constraints on the composition and evolution of eastern Anatolian sub-lithospheric mantle

Aktag, Alican
Sayıt, Kaan
Peters, Bradley J.
Furman, Tanya
Rickli, Jorg
Quaternary Elazig mafic alkaline volcanism is part of the anorogenic volcanic system of the circum-Mediterranean region, and it provides crucial insights into the chemical nature of the mantle source domains beneath eastern Turkey. Elemental and isotope geochemistry reveals that these mafic lithologies are mainly free of crustal contamination, reflecting geochemical signatures inherited from partial melting of their mantle sources. The trace element and Sr-Nd-Hf-Pb isotope systematics of the most primitive members of this volcanism are consistent with a predominant contribution from a sub-lithospheric component which compositionally re-sembles component C, believed to be common to global OIBs and MORBs. However, the total range of the isotope data also requires the involvement of two additional mantle components into their genesis: a depleted asthenospheric component (DM) and an enriched component (EM-type) representing metasomatized lithospheric mantle. We propose that the recycled oceanic lithologies with C-like signatures are dispersed in the astheno-spheric mantle beneath eastern Anatolia and have undergone mixing with the depleted mantle matrix. When considering these with the melting models, it appears that the garnet-facies partial melts of the C-DM mixture have experienced a small degree of interaction with the melts from an SCLM domain modified by slab-derived melts and/or fluids. The metasomatized SCLM domain may be intrinsic to the eastern Anatolian lithosphere or occur as pods embedded in the asthenosphere. The chemical characteristics of the Elazig Volcanics may confirm the wide-range dispersal of the common component in the sub-lithospheric mantle beneath the region extending from western Europe to eastern Turkey. However, the common component resides beneath Anatolia appear to have distinct composition (i.e., Pb isotope systematics) than the ubiquitous component shared mostly by European intraplate volcanics (i.e., LVC/EAR).


Geochemical constraints on the Cenozoic, OIB-type alkaline volcanic rocks of NW Turkey: Implications for mantle sources and melting processes
ALDANMAZ, ERCAN; KÖPRÜBAŞI, NEZİHİ; GÜRER, ÖMER FEYZİ; Kaymakcı, Nuretdin; Gourgaud, Alan (Elsevier BV, 2006-01-01)
The volcanic province of North-West Turkey contains a number of intra-continental alkaline volcanic eruption sequences formed along the localized extensional basins developed in relation with the Late Cenozoic extensional processes. The volcanic suite comprises the extracted melt products of adiabatic decompression melting of the mantle that are represented by small-volume intra-continental plate volcanic rocks of alkaline olivine basalts and basanites with compositions representative of mantle-derived, pri...
Source components and magmatic processes in the genesis of Miocene to Quaternary lavas in western Turkey: constraints from HSE distribution and Hf-Pb-Os isotopes
Aldanmaz, Ercan; Pickard, Megan; Meisel, Thomas; Altunkaynak, Şafak; Sayıt, Kaan; Sen, Pinar; Hanan, Barry B.; Furman, Tanya (Springer Science and Business Media LLC, 2015-08-01)
Hf-Pb-Os isotope compositions and highly siderophile element (HSE) abundance variations are used to evaluate the mantle source characteristics and possible effects of differentiation processes in lavas from western Turkey, where the eruption of Late Miocene to Quaternary OIB-type intraplate mafic alkaline lavas followed pre-Middle Miocene convergent margin-type volcanism. Concentrations of Os, Ir, and Ru (IPGE) in the OIB-type intraplate lavas decrease with fractionation for primitive melts (MgO > 10 wt%), ...
Source rock potential and organic facies properties of the oligo-miocene deposits in the Pasinler-Horasan, Tercan-Aşkale Basins (East Anatolia)
Tekin, Tansel; Günal Türkmenoğlu, Asuman; Department of Geological Engineering (2002)
The study involves the investigations of source rock potential and their organic facies characteristics and the depositional conditions of the Oligo-Miocene deposits in the Tercan-Aşkale and Pasinler-Horasan Basins (Eastern Anatolia). For this purpose, seven stratigraphic sections from each basin are studied. Organic geochemical and organic petrographic (microscopy based organic facies study) analyses are carried out by using a total of 102 surface samples. The studied sections are composed dominantly of cl...
Hydrogeochemical outline of thermal waters and geothermometry applications in Anatolia (Turkey)
Mutlu, Halim; Güleç, Nilgün Türkan (Elsevier BV, 1998-10-01)
The chemical compositions of a total of 120 thermal water samples from four different tectonically distinct regions (Central, North, East and West Anatolia) of Turkey are presented and assessed in terms of geothermal energy potential of each region through the use of chemical geothermometers. Na-Ca-HCO3, type waters are the dominant water types in all the regions except that Na-Cl type waters are typical for the coastal areas of West Anatolia and for a few inland areas of West and Central Anatolia where dee...
Hydrothermal alteration products in the vicinity of the Ahirozu kaolin deposits, Mihaliccik-Eskisehir, Turkey
Sayit, Isil Omeroglu; Günal Türkmenoğlu, Asuman; Sayin, S. Ali; Demirci, Cengiz (Mineralogical Society, 2018-06-01)
The mineralogy, texture and composition of rocks associated with the kaolin deposits in the Ahirozu-Hamidiye-Ucbasli area, SE of Mihaliccik, Eskisehir, Turkey, were investigated. In the study area, Triassic, blue-green schists and serpentinized ultramafic rocks are exposed. Kaolinization occurs at the contact between a Triassic granitic intrusion and metamorphic rocks. Textural and mineralogical characteristics were identified by X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive X-r...
Citation Formats
A. Aktag, K. Sayıt, B. J. Peters, T. Furman, and J. Rickli, “Trace element and Sr-Nd-Hf-Pb isotopic constraints on the composition and evolution of eastern Anatolian sub-lithospheric mantle,” LITHOS, vol. 430, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: