Gold mineralization related to a sulphide-bearing quartz vein within Triassic phyllites has been identified in a former study of an abandoned Cu-Zn-Pb mine in southern Tuscany-northern Latium. The vein-hosted mineral assemblage includes pyrite, sphalerite, chalcopyrite, galena, arsenopyrite, and tetrahedrite; the gold content reaches up to 20 ppm. The mineralization was related to fluids characterised by moderate temperatures and moderate salinities (5-15% NaCl equivalent) and represents the highest grade of Au in the ore deposits of southern Tuscany. The difference in the estimated values of Te of primary, L + V, pseudo-secondary L + V, secondary L + V fluids inclusions reflects different components present in the solutions. Based on these results one can conclude that euhedral quartz and pyrite deposition was related to fluids having variable salinity and chemical components. The origin of gold in Ponte San Pietro (PSP) deposit may be related to leaching of metapelites/phyllites derived from pelitic rocks containing some amount of sulphur-bearing organic matter; it is worthy noting that quartz-marcasite bearing lenses, interstratified in Triassic phyllites, contain significant amount of visible gold. The Co, Ni, Mn, as well as the delta(34)S data, suggest a different origin for the phyllite-hosted marcasite, the PSP quartz-vein hosted pyrite, and for gold occurrences. (C) 2003 Elsevier Science B.V All rights reserved.

Gold occurrence in Central Italy - the Ponte San Pietro mineralization / G., De Casa; A., Manni; Saviano, Giovanna; Violo, Maurizio. - In: ORE GEOLOGY REVIEWS. - ISSN 0169-1368. - 23:3-4(2003), pp. 99-105. [10.1016/s0169-1368(03)00017-9]

Gold occurrence in Central Italy - the Ponte San Pietro mineralization

SAVIANO, Giovanna;VIOLO, MAURIZIO
2003

Abstract

Gold mineralization related to a sulphide-bearing quartz vein within Triassic phyllites has been identified in a former study of an abandoned Cu-Zn-Pb mine in southern Tuscany-northern Latium. The vein-hosted mineral assemblage includes pyrite, sphalerite, chalcopyrite, galena, arsenopyrite, and tetrahedrite; the gold content reaches up to 20 ppm. The mineralization was related to fluids characterised by moderate temperatures and moderate salinities (5-15% NaCl equivalent) and represents the highest grade of Au in the ore deposits of southern Tuscany. The difference in the estimated values of Te of primary, L + V, pseudo-secondary L + V, secondary L + V fluids inclusions reflects different components present in the solutions. Based on these results one can conclude that euhedral quartz and pyrite deposition was related to fluids having variable salinity and chemical components. The origin of gold in Ponte San Pietro (PSP) deposit may be related to leaching of metapelites/phyllites derived from pelitic rocks containing some amount of sulphur-bearing organic matter; it is worthy noting that quartz-marcasite bearing lenses, interstratified in Triassic phyllites, contain significant amount of visible gold. The Co, Ni, Mn, as well as the delta(34)S data, suggest a different origin for the phyllite-hosted marcasite, the PSP quartz-vein hosted pyrite, and for gold occurrences. (C) 2003 Elsevier Science B.V All rights reserved.
central italy; fluid inclusions; gold occurrences; model of mineralization
01 Pubblicazione su rivista::01a Articolo in rivista
Gold occurrence in Central Italy - the Ponte San Pietro mineralization / G., De Casa; A., Manni; Saviano, Giovanna; Violo, Maurizio. - In: ORE GEOLOGY REVIEWS. - ISSN 0169-1368. - 23:3-4(2003), pp. 99-105. [10.1016/s0169-1368(03)00017-9]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/251771
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 2
social impact