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

Sánchez Pérez-Cejuela, Virginia and Stuart , Finlay M. and Martín Crespo, Tomás and Vindel Catena, Elena and Corbella, Mercè and Cardellach, Esteve (2010) EXPRESS LETTER Helium isotopic ratios in fluid inclusions from fluorite-rich Mississippi Valley- Type district of Asturias, northern Spain. Geochemical journal, 44 . e1-e4. ISSN 0016-7002

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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.


Item Type:Article
Uncontrolled Keywords:Fluorite, Noble gases, Helium isotopes, Fluid inclusions, Asturias, MVT deposits
Subjects:Sciences > Geology > Crystallography
ID Code:16445
Deposited On:19 Sep 2012 10:01
Last Modified:19 Sep 2012 10:01

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