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Isotope Geology of the Norilsk DepositsLutetium and Hafnium Isotopes in Zircons

Isotope Geology of the Norilsk Deposits: Lutetium and Hafnium Isotopes in Zircons [Lu–Hf isotope is an informative geochemical tool. Comprehensive in situ study of U–Pb and Lu–Hf isotope systems in zirconium minerals (zircon, baddeleyite) by LA-ICP-MS allows obtaining characteristics of the initial substance and evolution of the earth’s crust. The data bear the crucial important information about the parent rocks and ore source in the Norilsk-Taymyr district. This chapter presents data obtained in VSEGEI isotope laboratory and in Australia. In Norilsk ores, significant variations in Hf isotopic composition have been revealed. Zircons of commercially ore-bearing intrusions have an increased value of εHf (to +10, weighted average εHf(T) = 8.2 ± 1.8). Compared with them, the Lower Talnakh low ore-bearing intrusion has practically zero εHf values. Thus, according to the results of the studied zircon sample, we can say that high εHf values are a necessary isotope criterion of ore content.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Isotope Geology of the Norilsk DepositsLutetium and Hafnium Isotopes in Zircons

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Publisher
Springer International Publishing
Copyright
© Springer Nature Switzerland AG 2019. Translation from the Russian language edition Изотопная геология норильских месторождений, © Коллектив авторов 2017, © ФГБУ «Всероссийский научно-исследовательский геологический институт им. А. П. Карпинского» 2017. Published by Издательство ВСЕГЕИ. All Rights Reserved.
ISBN
978-3-030-05215-7
Pages
189 –205
DOI
10.1007/978-3-030-05216-4_6
Publisher site
See Chapter on Publisher Site

Abstract

[Lu–Hf isotope is an informative geochemical tool. Comprehensive in situ study of U–Pb and Lu–Hf isotope systems in zirconium minerals (zircon, baddeleyite) by LA-ICP-MS allows obtaining characteristics of the initial substance and evolution of the earth’s crust. The data bear the crucial important information about the parent rocks and ore source in the Norilsk-Taymyr district. This chapter presents data obtained in VSEGEI isotope laboratory and in Australia. In Norilsk ores, significant variations in Hf isotopic composition have been revealed. Zircons of commercially ore-bearing intrusions have an increased value of εHf (to +10, weighted average εHf(T) = 8.2 ± 1.8). Compared with them, the Lower Talnakh low ore-bearing intrusion has practically zero εHf values. Thus, according to the results of the studied zircon sample, we can say that high εHf values are a necessary isotope criterion of ore content.]

Published: May 9, 2019

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