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Comptes Rendus Géoscience
Volume 335, n° 8
pages 671-680 (août 2003)
Doi : 10.1016/S1631-0713(03)00120-2
Received : 7 October 2002 ;  accepted : 23 June 2003
The Bolcana Cu-Au ore deposit (Metaliferi Mountains, Romania): first data on the alteration and related mineralisation

Viorica  Milu a ,  Jacques L.  Leroy b * ,  Patrice  Piantone c
aDepartment of Mineral Resources, Geological Institute of Romania, 1 Caransebes Str., 78344-Bucharest, Romania 
bUMR G2R, université Henri-Poincaré - Nancy-1, BP 239, 54506 Vandoeuvre-lès-Nancy cedex, France 
cBRGM, DR/REM, BP 6009, 45060 Orléans cedex 2, France 

*Corresponding author.
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The Bolcana ore deposit (Metaliferi Mountains, western Romania) is a porphyry ore deposit with associated epithermal veins. On the basis of different parageneses, four alteration types were distinguished: potassic, phyllic, argillic and propylitic. The mineralogical and geochemical data and estimated crystallisation temperatures of alteration minerals indicate an evolution of the system from an early period of porphyry type mineralisation (Cu Au) to a late period of low-sulphidation epithermal mineralisation (Au base metal). To cite this article: V. Milu et al., C. R. Geoscience 335 (2003).

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Le gisement de Bolcana (monts Métallifères, Roumanie occidentale) est un gisement de type porphyre, associé à des veines épithermales, dans lequel les quatre types d'altération caractéristiques, potassique, phylliteuse, argileuse et propylitique, ont été reconnus à partir des différentes associations minérales rencontrées. Les analyses minéralogiques et géochimiques ainsi que les températures de cristallisation estimées des minéraux d'altération indiquent une évolution du système depuis une période initiale de minéralisation à cuivre-or de type porphyre jusqu'à une minéralisation épithermale à or-métaux de base de type low-sulphidation. Pour citer cet article : V. Milu et al., C. R. Geoscience 335 (2003).

Mots clés  : Cu-Au ore deposit ; porphyry-epithermal deposit ; hydrothermal alteration ; geothermometer ; Metaliferi Mountains ; Romania.

Mots clés  : gisements de cuivre-or ; gisement de type porphyre-épithermal ; altérations hydrothermales ; géothermomètres ; monts Métallifères ; Roumanie.




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