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Preliminary mineralogical and petrological study of the Ortosa Au–Bi–Te ore deposit: a reduced gold skarn in the northern part of the Rio Narcea Gold Belt, Asturias, Spain

Preliminary MineralogicalEngineeringOrtosa Au–bi–teGeologyMineral DepositGeochemistryMineral GeochemistryReduced Gold SkarnOre GenesisPetrologyOre FormationTectonics