Iron sulphides at the epithermal gold-copper deposit of Palai-Islica (Almería, SE of Spain) Carrillo Rosúa, Francisco Javier Morales Ruano, Salvador Fenoll Hach-Alí, Purificación Pyrite Pirita Gold Oro Epithermal Epitermal Spain España El artículo original ha sido publicado por la Mineralogical Society disponible en: http://www.minersoc.org/pages/e_journals/minmag.html Au-Cu mineralisation at Palai-Islica occurs as disseminations in massive silicification and, more abundantly, in sulphide-bearing quartz veins. The major ore minerals in the deposit are pyrite ± chalcopyrite, sphalerite and galena and there are a great variety of accessory minerals, including Au-Ag alloys and native gold. Pyrite, the most abundant sulphide, is closely associated with gold. Seven different types of pyrite have been distinguished with a variable concentration of different trace elements. Among them only free of trace elements (type IV) is related to Au-Ag alloys. Pyrites associated with these Au-Ag alloys have a cubic and pentagonal dodecahedral habits whereas those with only the pentagonal dodecahedral habit are from barren zones. In addition, there is no significant invisible gold in pyrite, but there is relatively high Ag in collomorphic pyrite (up to 0.20 wt%) or type III pyrite (up to 1.47 wt%). As is the most abundant trace element in pyrite (up to 6.11 wt%), present as a metastable solid solution or as a non-stoichiometric element. Some kind of marcasite related with gold levels also have considerable amounts of trace elements (As, up to 1.15 wt%, Sb up to 0.40 wt%) 2011-01-21T07:51:56Z 2011-01-21T07:51:56Z 2003 info:eu-repo/semantics/article Carrillo Rosúa, F. J., Morales Ruano, S., & Hach-Alí, P. F. (2003). Iron sulphides at the epithermal gold-copper deposit of palai-islica (almería, SE spain). Mineralogical Magazine, 67(5), 1059-1080. doi:10.1180/0026461036750143 0026-461X http://hdl.handle.net/10481/7314 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Mineralogical Society