Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/4182
Title: The magnetic susceptibility of granitic rocks as a proxy for geochemical composition: Example from the Saruhan granitoids, NE Turkey
Authors: Aydın, Ali
Ferré, E.C.
Aslan, Z.
Keywords: Granite
Magnetic susceptibility
Major elements
Pluton
Turkey
chemical composition
field method
granitoid
igneous geochemistry
magnetic method
magnetic survey
magnetic susceptibility
mineralogy
petrogenesis
petrography
Eurasia
Abstract: The magnetic susceptibility of rocks is determined by their bulk chemistry and magnetic mineralogy. In this case study of the Saruhan pluton in Turkey, a detailed survey based on 925 field measurements and 37 whole rock analyses, reveals a strong correlation between magnetic susceptibility and FeOt (R2 = 0.8). Petrographic observations and calculations based on whole-rock major element analyses indicate the presence of magnetite grains. Further calculations show that magnetite accounts for 88% of the magnetic susceptibility. The spatial correlation between FeOtotal and the magnetic susceptibility is particularly spectacular which suggests that Km is a proxy for geochemical differentiation. The zoning pattern of magnetic susceptibility across the pluton is concentric and reverse, with the highest values of magnetic susceptibility in the center. This type of zoning is consistent with a previously proposed petrogenetic model. The comparison of the Saruhan granites with a classic example of paramagnetic granites reveals two contrasted FeOt-Km trends. This suggests that these variations can be a useful tool to distinguish between leucocratic paramagnetic and leucocratic ferrimagnetic granites. © 2007 Elsevier B.V. All rights reserved.
URI: https://hdl.handle.net/11499/4182
https://doi.org/10.1016/j.tecto.2007.04.009
ISSN: 0040-1951
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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