Helium isotopic ratios in fluid inclusions from fluorite-rich Mississippi Valley-type district of Asturias, northern Spain

Virginia Sánchez, Finlay M. Stuart, Tomás Martín-Crespo, Elena Vindel, Mercé Corbella, Esteve Cardellach

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9 Citations (Scopus)

Abstract

Helium isotopes have been measured in fluorite and sulphides from fluorite-rich Mississippi Valley-type (MVT) deposits from Asturias, Spain, in order to assess the involvement of mantle and crust-derived volatiles in the genesis of the deposits. The 3He/4He of the ore fluids are ≤0.1 Ra ruling out a contribution of mantle-derived magmatic helium in the inclusion fluids. Data support a crustal source for the volatiles and is consistent with the existing basinal model for the genesis of the Asturias MVT mineralization by mixing of sedimentary brines with infiltrating superficial fluids. Copyright © 2010 by The Geochemical Society of Japan.
Original languageEnglish
JournalGeochemical Journal
Volume44
Issue number6
Publication statusPublished - 1 Dec 2010

Keywords

  • Asturias
  • Fluid inclusions
  • Fluorite
  • Helium isotopes
  • MVT deposits
  • Noble gases

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