Ree mobilization in complex hydrothermal-metasomatic systems: fluid chemistry evidence of albitite and chlorite-talc mineralisations in Central Sardinia, Italy (Contributo in atti di convegno)

Type
Label
  • Ree mobilization in complex hydrothermal-metasomatic systems: fluid chemistry evidence of albitite and chlorite-talc mineralisations in Central Sardinia, Italy (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Fadda S., Fiori M., Grillo S.M., Prochaska W. (2011)
    Ree mobilization in complex hydrothermal-metasomatic systems: fluid chemistry evidence of albitite and chlorite-talc mineralisations in Central Sardinia, Italy
    in 10th International Congress for Applied Mineralogy ICAM, Trondheim (Norvegia), 1-5 August 2011
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Fadda S., Fiori M., Grillo S.M., Prochaska W. (literal)
Pagina inizio
  • 171 (literal)
Pagina fine
  • 178 (literal)
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  • Proceedings 10th ICAM,Trondheim, 01/-05 August 2011, Maarten A.T.M. Broekmans (Editor-in-Chief), pagg.171-178, ISBN 978-82-7385-139-0 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
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  • IGAG - CNR, Istituto di Geologia Ambientale e Geoingegneria, Dipartimento di Georisorse e Geoingegneria DIGITA, Università di Cagliari Department of Applied Geosciences, Sciences and Geophysics, University of Leoben, Austria (literal)
Titolo
  • Ree mobilization in complex hydrothermal-metasomatic systems: fluid chemistry evidence of albitite and chlorite-talc mineralisations in Central Sardinia, Italy (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-82-7385-139-0 (literal)
Abstract
  • Several Na-feldspar and talc-chlorite deposits occur in central Sardinia. The development of post-magmatic Na-metasomatism mainly involved the bulk of the local plutons to which economic occurrences of metasomatic chlorite-talc are also associated. REE- bearing minerals have been found in the unaltered granodiorites, while different amounts of REE were redistributed in secondary phases in albitites during metasomatism. REE-bearing minerals are strongly depleted in chloritized rocks. Lanthanides may be mobilized under hydrothermal activity depending upon physicochemical conditions in the fluid phase. Among ligands, carbonates appear to have increased the solubility of REE somewhat but chlorine complexes may have played the major role in the REE depletion of granites. However, other competing complexes can attain importance where their concentrations are somewhat anomalous. Preliminary analytical results for the investigated fluids appeal to an extensive leaching of REE by highly saline, halogen-rich solutions with the most striking features being the high contents of bromine. (literal)
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