The occurrence and origin of babingtonite in the El Valle-Boina's Cu-Au deposit in Asturias, Spain
Cepedal, Antonia; Moreiras, Dámaso; Martín-Izard, Agustín; González-Nistal, Santiago; Rodríguez-Pevida, Luis
European Journal of Mineralogy Volume 15 Number 6 (2004), p. 1069 - 1077
published: Jan 5, 2004
ArtNo. ESP147051506015, Price: 29.00 €
Babingtonite has been found at El Valle-Boinás Cu-Au deposit, Spain, this being the first known occurrence of this mineral in skarn in Spain. It is a locally abundant accessory mineral related to the hydrothermal alteration of the calcic skarn. Babingtonite is present in metasomatized aplitic dykes or occurs as a consequence of alteration of Fe-rich end members of both hedenbergite and andradite and always in association with Fe-rich epidote (Ps32-48). Other related minerals are calcite, quartz, hydroxyapophyllite, hydroandradite, prehnite, pumpellyite-(Fe+2), Cu-sulphides and electrum. The babingtonite formation is related to the locally Al-depleted aqueous fluids at relative high fO2 and low XCO2.