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Isotope Geology of the Norilsk DepositsHelium and Argon Isotopes

Isotope Geology of the Norilsk Deposits: Helium and Argon Isotopes [The results of helium and argon isotope composition measurements (3He/4He, 40Ar/36Ar ratios and others) are presented in the chapter. In paleofluids from the Norilsk intrusions, the crustal helium is dominant, and the fraction of mantle helium is in the range from 0.1 to 22%. The contribution of crustal helium (0.1–4%) in rich and medium intrusions is especially low. In this parameter, poor intrusions (4–22%) are significantly different, with much more mantle helium. In fluid inclusions of the studied targets, the share of air argon is high, 60–100%. It is especially high in rich intrusions, from 88 to 100%. Consequently, air-saturated waters from enclosing sedimentary rocks actively participated in the formation of rocks and ores of the intrusions in the region. Average (by reserves) intrusions differ significantly from the rich ones; they contain only 60–85% of atmospheric argon.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Isotope Geology of the Norilsk DepositsHelium and Argon Isotopes

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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
1 –47
DOI
10.1007/978-3-030-05216-4_1
Publisher site
See Chapter on Publisher Site

Abstract

[The results of helium and argon isotope composition measurements (3He/4He, 40Ar/36Ar ratios and others) are presented in the chapter. In paleofluids from the Norilsk intrusions, the crustal helium is dominant, and the fraction of mantle helium is in the range from 0.1 to 22%. The contribution of crustal helium (0.1–4%) in rich and medium intrusions is especially low. In this parameter, poor intrusions (4–22%) are significantly different, with much more mantle helium. In fluid inclusions of the studied targets, the share of air argon is high, 60–100%. It is especially high in rich intrusions, from 88 to 100%. Consequently, air-saturated waters from enclosing sedimentary rocks actively participated in the formation of rocks and ores of the intrusions in the region. Average (by reserves) intrusions differ significantly from the rich ones; they contain only 60–85% of atmospheric argon.]

Published: May 9, 2019

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