Relative involvement of mantle and crustal components in the Agacoren granitoid (central Anatolia, Turkey): Estimates from trace element and Sr-isotope data

Date

1998-02-01

Author

Güleç, Nilgün Türkan

Metadata

Show full item record

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

Item Usage Stats

51
views

0
downloads

Trace element contents, together with Sr-isotope ratios on a limited number of samples, are reported for the central part of the Agacoren granitoid in central Anatolia (Turkey), Trace element contents are depicted in terms of Ocean Ridge Granitoid (ORG)-normalized elemental patterns. The patterns display similarities to Volcanic Arc Granitoids (VAG) and/or Collision Granitoids (COLG), and are characterized by enrichment in Large Ion Lithophile (LIL) elements relative to High Field Strength (HFS) elements, negative Ba and positive Rb, Th and Ce anomalies, and high Th/Nb ratios. A comparison with the patterns typical of upper continental crust, lower continental crust and volcanic are calc-alkaline basalt implies that the Agacoren granitoid inherited its pattern essentially from the upper crust, although inheritance-in part-from a subduction modified upper mantle is also possible. Plot of Rb/Sr ratios against the initial Sr-87/Sr-86 ratios at the time of granitoid intrusion (110 Ma) suggests the derivation of granitoid from a mixture of about 70% (upper) crustal + 30% mantle components, the mixture later undergoing a maximum of about 21% fractional crystallization. The relative proportion of mantle and crustal components, as constrained from the isotope data, exceeds the limits-for complete hybridization-imposed by mechanical and thermal arguments, but falls into the range for commingling (incomplete mixing) of mafic and felsic magmas, the validity of which is also supported by the presence of mafic microgranular enclaves in the granitoid. The modeling of trace element data based on the estimates from isotope data yield elemental patterns generally conformable to those displayed by granitic samples.

Subject Keywords

Continental-crust, Volcanic-rocks, Silicic magmas

URI

https://hdl.handle.net/11511/55852

Journal

CHEMIE DER ERDE-GEOCHEMISTRY

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

Multivariate statistics to investigate metal contamination in surface soil YAY, OZAN DEVRİM; Alagha, Omar; Tuncel, Süleyman Gürdal (2008-03-01) The modification of soil composition in the urbanized area of Ankara due to wet-dry deposition and pollution-derived particles from the atmosphere is investigated by analyzing 120 surface soil samples, collected from the urbanized area and its un-urbanized surrounding, for major, minor and trace elements. Concentrations of elements from human activity (e.g. Cd, Pb, Cr, Zn, Cu and Ca) in the urbanized area were higher than their corresponding concentrations in global average soil and soil in un-urbanized are...
Cyclic palaeokarst surfaces in Aptian peritidal carbonate successions (Taurides, southwest Turkey): internal structure and response to mid-Aptian sea-level fall Yılmaz, İsmail Ömer; Altıner, Demir (Elsevier BV, 2006-12-01) The sedimentology and cyclic stratigraphy of palaeokarst structures in Aptian peritidal carbonate successions are interpreted using field and laboratory microfacies analyses of closely spaced samples from measured outcrop stratigraphic sections in southwest Turkey. Cycles displaying shallowing-upward metre-scale cyclicity are generally composed of lime mudstones/wackestones/packestones at the bottom and stromatolites or lime mudstones with charophytes and ostracods at the top. Subaerial exposure structures ...
CO2 outburst events in relation to seismicity: Constraints from microscale geochronology, geochemistry of late Quaternary vein carbonates, SW Turkey UENAL-IMER, Ezgi; UYSAL, I. Tonguc; ZHAO, Jian-Xin; Isik, Veysel; SHULMEISTER, James; İmer, Ali; FENG, Yue-Xing (2016-08-15) Vein and breccia carbonates precipitated in a highly fractured/faulted carbonate bedrock in SW Turkey were investigated through high-resolution U-series geochronology, microstructural and geochemical studies including C-O-Sr isotope and rare-earth element and yttrium (REY) analyses. Petrographical observations and geochronological data are interpreted as evidence that the calcite veins formed through a crack-seal mechanism, mostly accompanied/initiated by intensive hydraulic fracturing of the host limestone...
Size distribution of trace elements and major ions in the eastern Mediterranean atmosphere Kuloglu, E; Tuncel, Süleyman Gürdal (2005-10-01) Size distribution of trace elements is measured at the Mediterranean coast of Turkey, by analyzing hi-vol impactor samples collected between August 1993 and May 1994. Mass median diameters of marine elements are between 4.6 and 5.3 mu m, and those of crustal elements are between 3.0 and 3.5 mu m. Mass median diameters of crustal elements are 30% smaller in samples impacted by Saharan Dust. Pollution derived elements, As, Cd, Mo, Pb, Se, and Zn have MMD's between 1.25 and 1.01 mu m. Although 70-90% of the ma...
DISTRIBUTION OF SURFICIAL SHELF SEDIMENTS IN THE NORTHEASTERN AND SOUTHWESTERN PARTS OF THE SEA OF MARMARA - STRAIT AND CANYON REGIMES OF THE DARDANELLES AND BOSPORUS ERGIN, M; BODUR, MN; EDIGER, V (Elsevier BV, 1991-02-01) Surficial sediment samples collected from the northeastern and southwestern shelf regions of the Sea of Marmara, together with data available from other sources, indicate marked variations in sediment compositions resulting from differences in topographical, hydrological and biological conditions. In the strait channels of the Dardanelles and Bosporus, where strong undercurrents prevail, the floor was covered mostly by coarse-grained sediments (rich in sand and gravel). However, in areas of relatively low e...

Citation Formats

N. T. Güleç, “Relative involvement of mantle and crustal components in the Agacoren granitoid (central Anatolia, Turkey): Estimates from trace element and Sr-isotope data,” CHEMIE DER ERDE-GEOCHEMISTRY, pp. 23–37, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55852.