2026-06-29T03:08:23Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/423122024-08-02T15:00:31Zcom_20.500.14352_14col_20.500.14352_15

Sánchez Pérez-Cejuela, Virginia Stuart, Finlay M. Martín Crespo, Tomás Vindel Catena, Elena Corbella, Mercè Cardellach, Esteve 2023-06-20T00:16:29Z 2023-06-20T00:16:29Z 2010 0016-7002 https://hdl.handle.net/20.500.14352/42312 http://www.terrapub.co.jp/journals/GJ/index.html 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. eng open access EXPRESS LETTER Helium isotopic ratios in fluid inclusions from fluorite-rich Mississippi Valley- Type district of Asturias, northern Spain journal article