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    STUDIA GEOLOGIA - Ediţia nr.3 din 2003  
         
  Articol:   MINERALOGY OF A ôSACRED MONSTERö: THE DITRĂU ALKALINE MASSIF, EAST CARPATHIANS (ROMANIA).

Autori:  PAULINA H├éRTOPANU, GHEORGHE UDUBA┼×A.
 
       
         
  Rezumat:  Unique in the whole area of the Carpathians, the Ditrău alkaline massif (DAM) displays both a great variety of contrasting lithologies and a big number of mineral species. Rocks from ultrabasite to high alkaline types, as well as granites, contact metamorphic assemblages, porphyry-style ores (Aurora), veins with sulphides, oxides and various REE minerals are known to be concentrated on a relatively small area, of only about 100 sq.km. Due to contrasting host lithologies and various mineral forming processes the mineralogy of DAM is very complex. Nearly all the mineral classes have here representatives, including rare and very rare mineral species such as zirconosilicates, radioactive carbonates, sapphirine, Bi-sulphosalts, nearly all the species of the pyrochlore and perovskite groups etc, some of them forming single occurrences in Romania, e.g. hemusite, sederholmite, tungstenite, mosesite, senaite, srilankite, minrecordite, rosenbuschite, eudyalite, lovozerite, hiortdahlite, donpeacorite, sadanagaite, vishnevite, loparite etc. (Hirtopanu, 1998). The total number of mineral species is about 250 thus reaching the status of a ôsacred monsterö (Udubaşa, 1994). Nevertheless, there are both very frequent minerals such as nepheline, cancrinite, sodalite, various feldspars (including Ba-feldspars), amphiboles (K-pargasite, sadanagaite, magnesiosadanagaite, eckermannite, nyb÷ite, ferrinyb÷ite, richterite, Li-fluorarfvedsonite, Li-fluorkataphorite, Li-ferrieckermannite, etc.) and very rare or ôminor mineralsö such as isocubanite, ferromolybdite, strŘverite, w÷hlerite, zirkelite, betafite, yttrobetafite, willemseite, huttonite, cheralite, astrophyllite, aenigmatite, durangite etc. (Hirtopanu, 1998). ...  
         
     
         
         
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