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    STUDIA GEOLOGIA - Issue no. 1 / 2002  
         
  Article:   PRELIMINARY DATA ON THE MINERALOGY OF LIMESTONE AND SKARN-HOSTED CAVES FROM BIA (BIHOR COUNTY, ROMANIA).

Authors:  BOGDAN P. ONAC, PAUL DAMM.
 
       
         
  Abstract:  This paper presents the mineralization of five medium-size limestone-caves and eleven skarn-hosted caves from the upper part of Crisul Baitei River (Bihor Mountains). Apart from berlinite AlPO4, the other minerals reported from the limestone caves are common carbonates, phosphates or oxy-hydroxides. In turn, the skarn-hosted caves contain a diversity of minerals, including wittichenite, luzonite, natrolite, norsethite, rosasite, glaukosphaerite, aurichalcite, azurite, malachite and chalcanthite. Five of these minerals have never before been identified in a cave environment and moreover, three are new occurrences in Romania. Some of these minerals are hydrothermal in origin, whereas alteration and/or hydration of primary hydrothermal minerals formed the others. Considering the mineral assemblage, the morphology and the position of cavities within the skarn bodies, we assume these minerals formed during one of the following stages: hydrothermal, hydrothermal/vadose or vadose.  
         
     
         
         
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