Helium isotopic ratios in fluid inclusions from fluorite-rich Mississippi Valley- Type district of Asturias, northern Spain
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...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2010 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/43809 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/43809 |
| Access Level: | acceso abierto |
| Palabra clave: | 550.4(460.12) Fluorite Noble gases Helium isotopes Fluid inclusions Asturias MVT deposits Mineralogía (Geología) Geoquímica 2506.11 Mineralogía 2503 Geoquímica |
| Sumario: | 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. |
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