We studied three representative skarn orebodies of SW Sardinia (Perda Niedda, Monte Tamara and Rosas), related to ilmenite-series ferroan granites to assess their Sn-W and other Critical Raw Materials (CRM) metallogenic potential. The Perda Niedda skarn hosts magnetite, fluorite, cassiterite and minor sulfides in a garnet- (clinopyroxene)-amphibole-chlorite association at contact with granites. At Monte Tamara, scheelite-bearing hydrothermal veins and clinopyroxene-garnet skarns occur with minor cassiterite-stannite-molybdenite and Bi sulfosalts. Base-metal sulfides with subordinate magnetite-cassiterite-fluorite veinlets prevail at Rosas. Clinopyroxene, garnet and epidote mineral chemistry from the three locations allows a detailed reconstruction of the mineralised systems, in terms of proximity to causative intrusion, compositional variations of ores and Sn-W and CRM enrichment. Overall, the highlighted common features of the three skarns indicate that they may be framed within a single, district-scale Sn-W skarn system. Overall, their different mineralogy and geochemical fingerprint reflect formation mechanisms controlled by their distance from the causative intrusion

Mineralogical and compositional evidence of a district scale Sn-W skarn system in SW Sardinia: a review.

Matteo L. Deidda
;
Alfredo Idini;Dario Fancello;Giovanni De Giudici;Stefano Naitza
2023-01-01

Abstract

We studied three representative skarn orebodies of SW Sardinia (Perda Niedda, Monte Tamara and Rosas), related to ilmenite-series ferroan granites to assess their Sn-W and other Critical Raw Materials (CRM) metallogenic potential. The Perda Niedda skarn hosts magnetite, fluorite, cassiterite and minor sulfides in a garnet- (clinopyroxene)-amphibole-chlorite association at contact with granites. At Monte Tamara, scheelite-bearing hydrothermal veins and clinopyroxene-garnet skarns occur with minor cassiterite-stannite-molybdenite and Bi sulfosalts. Base-metal sulfides with subordinate magnetite-cassiterite-fluorite veinlets prevail at Rosas. Clinopyroxene, garnet and epidote mineral chemistry from the three locations allows a detailed reconstruction of the mineralised systems, in terms of proximity to causative intrusion, compositional variations of ores and Sn-W and CRM enrichment. Overall, the highlighted common features of the three skarns indicate that they may be framed within a single, district-scale Sn-W skarn system. Overall, their different mineralogy and geochemical fingerprint reflect formation mechanisms controlled by their distance from the causative intrusion
2023
978-2-8399-4046-7
File in 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/11584/384385
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 0
social impact