The Au-Cu epithermal deposit at Palai-Islica, Almería, SE of Spain: Preliminary data
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Morales Ruano, Salvador; Carrillo Rosúa, Francisco Javier; Fenoll Hach-Alí, Purificación; Fuente Chacón, Fernando de la; Contreras López, EmilioEditorial
Balkema
Materia
Epithermal Gold Copper Epitermal SE de España Oro Cobre
Date
1999Referencia bibliográfica
Morales Ruano, S.; Carrillo-Rosúa, F.J.; Fenoll Hach-Alí, P.; Fuente Chacón, F.; Contreras López, E. The Au-Cu epithermal deposit at Palai-Islica, Almería, SE of Spain: Preliminary data. In: Stanley, C.J. et al., (eds.) Mineral deposits, processes to processing: Proceedings of the Fifth Biennial SGA Meeting and the Tenth Quadrennial IAGOD Symposium. London (United Kingdom), 22-25 August 1999. Vol. 1. Rotterdam: A.A. Balkema, 1999. pp. 59-62. [http://hdl.handle.net/10481/35935]
Sponsorship
Departamento de Mineralogía y Petrología (Universidad de Granada) Grupo de Investigación de la Junta de Andalucía RNM-0131. Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR)Abstract
The following sequence of hydrothermal alteration has been indentified within the epithermal gold/copper-bearing deposit at Palai-Islica: propylitic, sericitic, argillitic (extending over a surface area of some 2.5 x 1.7 km2), and silicic (± carbontation). Mineralization appears in association with quartz viens, stockworks and layers of silica with sulphides (pyrite±chalcopyrite±other minor sulphides and native gold). Three fluids have been identified related to the mineralization: (A) a high-temperature, high-salinity fluid (magmatic=); (B)a fluid of relatively constant tremparature and varible salinity; and (C) a lower temperature and relatively low, constant salinity fluid (ground waters?). The considerable difference in the nature of these fluds (due mainly to the isothermal mixing of A and B fluids and a heterogeneous entrapment of the solutions- due possibly to boiling-) seems to have been responsible for the precipitation of gold.