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    STUDIA GEOLOGIA - Issue no. 3 / 2003  
         
  Article:   COMPARATIVE STUDY OF THE TETRAHEDRITES FROM THE METALIFEROUS MTS. AND BAIA MARE DISTRICT (ROMANIA) BASED ON MICROPROBE ANALYSES.

Authors:  GHEORGHE DAMIAN, FLOAREA DAMIAN. 		 
       
         
  Abstract:  Tetrahedrites are the most frequent minerals in the Neogene hydrothermal mineralizations from Baia Mare district and of the Metaliferous Mts. The hydrothermal ore deposits from Baia Mare area and South Apuseni Mts. are related to Neogene magmatism. In the Baia Mare district the metallogenetic activity would correspond to three distinct phases (Giuşcă et al., 1973) during the Sarmatian-Pontian. The mineralizations have mainly base-metal character, subordinately gold-silver and copper occur. The upper parts of the copper and base-metal mineralizations have important quantities of gold and silver. In the Metaliferous Mts. (South Apuseni Mts.) the metallogenic activity is developed in two phases in the Badenian and the Sarmatian (Vlad & Borcoş, 1994). The mineralizations are epithermal mainly of gold-bearing type and subordinately gold/base-metal character. The ore deposits are related to the subvolcanic bodies and are represented by the porphyry and hydrothermal vein types. Tetrahedrites are dominantly present in the veins containing native gold, gold-telluride and base-metal ± gold.  
         
     
         
         
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