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

Date

2022-11-01

Author

Aktag, Alican
Sayıt, Kaan
Peters, Bradley J.
Furman, Tanya
Rickli, Jorg

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

200
views

0
downloads

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).

Subject Keywords

Mantle components, asthenospheric mantle, sub-continental lithospheric mantle, isotope geochemistry, Elaz?g&nbsp, Volcanics, eastern Anatolia, VOLCANIC-ROCKS, CHEMICAL CLASSIFICATION, WESTERN ANATOLIA, COLLISION ZONE, ARABIAN PLATE, LU-HF, GEOCHEMISTRY, TURKEY, PETROGENESIS, BASALTS

URI

https://hdl.handle.net/11511/99931

Journal

LITHOS

DOI

https://doi.org/10.1016/j.lithos.2022.106849

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

IMMOBILE TRACE ELEMENT SYSTEMATICS OF OCEANIC ISLAND BASALTS: THE ROLE OF OCEANIC LITHOSPHERE IN CREATING THE GEOCHEMICAL DIVERSITY Sayıt, Kaan (2013-06-01) The Earth's mantle is known to be heterogeneous at different scales, which has been generally linked to the presence of diverse mantle reservoirs, some of which are believed to have remained isolated for long periods of time. When oceanic island basalts (OIBs) are subdivided into five distinct end-member groups on the basis of Sr-Nd-Pb isotope systematics, which include DM, EM1, EM2, HIMU and C, trace element systematics do not appear to be effective discriminators as isotopes, though an end-member signatur...
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 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...
Trace metal composition of particulate matter of the Danube River and Turkish rivers draining into the Black Sea Yigiterhan, Oguz; Murray, James W. (2008-08-16) We determined the composition of particles from several rivers entering the Black Sea as part of a broader study of the composition of suspended matter and sediments in the Black Sea. Suspended matter and surface sediment samples were collected from the Danube River draining from Europe and from four Turkish rivers (Sakarya, Yenice (Filyos), Kizilirmak and Yesilirmak Rivers) in Anatolia. All samples were digested and analyzed by inductively coupled plasma-mass spectrometry and atomic absorption spectrometry...
Origin and significance of a quartz tourmaline breccia zone within the central anatolian crystalline complex, Turkey Demirel, Serhat; Göncüoğlu, Mehmet Cemal; Department of Geological Engineering (2004) The aim of this study is to investigate the petrography, geochemistry and evolution of quartz-tourmaline-rich rocks occurring in a wide breccia zone within the Late Cretaceous Kerkenez Granitoid (Central Anatolian Crystalline Complex (CACC), Turkey). The approximately 40-m wide main breccia zone has a NE-SW trend and is characterized by intense cataclastic deformation. The breccia zone can be traced several kilometers towards the west and generally occurs as tourmaline-filled faults and 1mm-30cm-thick veins...

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: https://hdl.handle.net/11511/99931.