Sr and Nd isotopic characteristics of some S-, I- and A-type granitoids from Central Anatolia

Date

2008-01-01

Author

Köksal, Serhat
Göncüoğlu, Mehmet Cemal

Metadata

Show full item record

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

Item Usage Stats

46
views

0
downloads

The petrogenesis of some Late Cretaceous S-, I- and A-type granitoids; in the Aksaray and Kirsehir 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 (Sinandi and Namlikisla) have calc-alkaline peraluminous characteristics and show LILE and LREE enrichment. The I-type Central Anatolian granitoids (Borucu, Terlemez, Hisarkaya, Baranadag), on the other hand, are calc-alkaline (excepting the alkaline Baranadag sample) and metaluminous or slightly peraluminous with LILE and LREE enriched patterns and variable Eu-anomalies. Additionally, the A-type Camsan granitoid is alkaline and metaluminous with the highest LREE contents. Isotope data from the I-type Central Anatolian granitoids (Sr-87/Sr-86((i)): 0.7078-0.7109; epsilon Nd: -5.4 to -7.9), and the A-type Camsan granitoid (Sr-87/Sr-86((i)): 0.7082; epsilon Nd: -7.1) are similar. The S-type Central Anatolian granitoids, on the other hand, have more radiogenic initial Sr isotopic ratios (Sr-87/Sr-86((i)): 0.7128-0.7152) and lower epsilon Nd values (-9.1 to -9.7) than the I- and A-type granitoids from Central Anatolia. When combined with the available petrological and age data, the isotope data presented in this study support the suggestion of collisional S-type granitic associations, and younger post-collisional and subsequent extensional I- and A-type magmatism in Central Anatolia. Sr and Nd isotope data infer that the I- and A-type Central Anatolian granitoids have hybrid and heterogeneous sources, while in the A-type granitoids a mantle component is likely to be dominant. Moreover, the S-type Central Anatolian granitoids were possibly derived from crustal, or crustal-dominated sources. Furthermore, the increase of Sr-87/Sr-86(i) and decrease of epsilon Nd values observed from S-type granitoids to I- and A-type magmatic rocks is either related to distinct source characteristics or to isotopic mixing between mantle and crustal sources through time.

Subject Keywords

Sr-Nd isotope geochemistry, Central Anatolia, Granitoid

URI

https://hdl.handle.net/11511/52641

Journal

TURKISH JOURNAL OF EARTH SCIENCES

Collections

Test and Measurement Center In advanced Technologies (MERKEZ LABORATUVARI), Article

Suggestions

OpenMETU
Core

Sr, Nd and Hf isotopic signatures and LA-SF-ICP-MS U-Pb zircon ages from the Satansarı Granitoid (Aksaray), Central Anatolian Crystalline Complex Göncüoğlu, M. Cemal; Köksal, Serhat; Frei, Dirk; Toksoy Köksal, Fatma; Möller, Andreas; Gerdes, Axel (2010-03-25) Granitic rocks within the Satansarı area are mainly in monzonite and quartz-monzonite compositions with subalkaline, metaluminous and magnesian geochemical characteristics. The Satansarı granitoid show depletion in Ba, Nb, P and Ti and enrichment of Th, U, K and Pb on the primitive mantle-normalized spider diagrams. Moreover, the Satansarı granitoid displays LREE enriched patterns ([La/Yb]N = 18.45 – 21.21) with negative Eu-anomalies, although not very significant ([Eu/Eu*]N = 0.65 – 0.73). Geochemical data...
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...
mu+N ->tau+N at a muon or neutrino factory Sher, M; Turan, İsmail (American Physical Society (APS), 2004-01-01) The experimental discovery of large nu(mu)-nu(tau) mixing indicates that analogous mixing in the charged lepton sector could be substantial. We consider the possibility that if a high intensity muon beam, perhaps at the early stages of a muon or neutrino factory, strikes a nuclear target, then conversion of some of the muons into tau leptons could occur (similar to the conversion of muons to electrons at MECO). Using current experimental limits on rare tau decays to bound the size of the relevant operators,...
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 (2016-04-11) 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...
Cretaceous Evolution of the Central Asian Proto-Paratethys Sea: Tectonic, Eustatic, and Climatic Controls Kaya, Mustafa Yücel; Dupont-Nivet, Guillaume; Proust, Jean-Noël; Roperch, Pierrick; Meijer, Niels; Frieling, Joost; Fioroni, Chiara; Altıner, Sevinç; Stoica, Marius; Aminov, Jovid; Mamtimin, Mehmut; Guo, Zhaojie (American Geophysical Union (AGU), 2020-09-01) The timing and mechanisms of the Cretaceous sea incursions into Central Asia are still poorly constrained. We provide a new chronostratigraphic framework based on biostratigraphy and magnetostratigraphy together with detailed paleoenvironmental analyses of Cretaceous records of the proto‐Paratethys Sea fluctuations in the Tajik and Tarim basins. The Early Cretaceous marine incursion in the western Tajik Basin was followed by major marine incursions during the Cenomanian (ca. 100 Ma) and Santonian (ca. 86 Ma...

Citation Formats

S. Köksal and M. C. Göncüoğlu, “Sr and Nd isotopic characteristics of some S-, I- and A-type granitoids from Central Anatolia,” TURKISH JOURNAL OF EARTH SCIENCES, pp. 111–127, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52641.