Sr, Nd and Hf isotopic signatures and LA-SF-ICP-MS U-Pb zircon ages from the Satansarı Granitoid (Aksaray), Central Anatolian Crystalline Complex

Date

2010-03-25

Author

Göncüoğlu, M. Cemal
Köksal, Serhat
Frei, Dirk
Toksoy Köksal, Fatma
Möller, Andreas
Gerdes, Axel

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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 infer crustal source with an inherited subduction component and the plagioclase and amphibole fractionation for the Satansarı granitoid. Furthermore, Sr and Nd isotopic data reveal crustal signature for the Satansarı granitoid with high 87Sr/86Sr(T) ratios (0.70826 – 0.70917), and low εNd(T) values (-6.86 – -7.59). Magmatic zircon crystals are typical for the Satansarı granitoid with internal structures representing zircon crystals with inherited cores those are reworked, resorbed and overgrown by igneous zoning and/or completely newly grown zircon crystals in a single magmatic episode. LA-SF-ICP-MS U-Pb zircon ages yield mean 206Pb/238U age of 74.28±0.57 Ma for the Satansarı granitoid with rare discordant analyses giving 207Pb/206Pb ages ranging from the Devonian to the Proterozoic (i.e., 364 Ma to 1263 Ma). LA-MC-ICP-MS data reveal low 176Lu/177Hf ratios and negative εHf(t) values indicating the significance of the crustal signature within the Satansarı zircons. Therefore the potential sources of the Satansarı granitoid are suggested to be crustally-derived melts.

Subject Keywords

Satansarı, Central Anatolia, Granitoid, zircon, LA-ICP-MS, U-Pb, Satansarı, Orta Anadolu, Granitoyid, Xgranitoyid, Zirkon, U-Pb, LA-ICP-MS

URI

https://hdl.handle.net/11511/75637
https://www.jmo.org.tr/resimler/ekler/9d67d53aeb86e49_ek.pdf

Conference Name

63rd Geological Congress of Turkey, (22 - 25 Mart 2010)

Collections

Department of Geological Engineering, Conference / Seminar

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Citation Formats

M. C. Göncüoğlu, S. Köksal, D. Frei, F. Toksoy Köksal, A. Möller, and A. Gerdes, “Sr, Nd and Hf isotopic signatures and LA-SF-ICP-MS U-Pb zircon ages from the Satansarı Granitoid (Aksaray), Central Anatolian Crystalline Complex,” presented at the 63rd Geological Congress of Turkey, (22 - 25 Mart 2010), Ankara, Türkiye, 2010, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/75637.