Strontium content was measured in barite and some lithotypes, such as metabasites and dolomitic rocks, occurring at Timpone Scifariello (San Donato Unit) mineralized area (Calabria, Italy). The mineralization, made up mostly of barite with subordinated sphalerite and very minor galena and Zn-carbonates, is found in grey epimetamorphic Megalodon dolomites (Carnic-Noric in age). The Sr content in the barite ranges from 5700 to 32,000 ppm, the lowest value shown by the synsedimentary occurrence of barite and the highest related to barite remobilization. The latter is caused by metamorphism connected with the Alpine orogenesis, and/or other subsequent tectonic events. Sr isotope ratios of the S. Donato Unit barite range from 0.707029 to 0.707103. These values are very similar (within 2σ) and consistent with direct precipitation of barite from seawater during Mid-Late Triassic time. This is in agreement with the synsedimentary features of the mineralizations and the depositional characteristics of the sedimentary series, within which the mineralization occurs. In this hypothesis, the volcanism, represented by outcrops of metabasic rocks, has played a secondary role contributing, probably, to an increased content of Ba and subordinately of Sr and metallic ions.

Strontium geochemistry of the San Donato Unit barite mineralization (Calabria, Italy)

TURCO, Eugenio
1984-01-01

Abstract

Strontium content was measured in barite and some lithotypes, such as metabasites and dolomitic rocks, occurring at Timpone Scifariello (San Donato Unit) mineralized area (Calabria, Italy). The mineralization, made up mostly of barite with subordinated sphalerite and very minor galena and Zn-carbonates, is found in grey epimetamorphic Megalodon dolomites (Carnic-Noric in age). The Sr content in the barite ranges from 5700 to 32,000 ppm, the lowest value shown by the synsedimentary occurrence of barite and the highest related to barite remobilization. The latter is caused by metamorphism connected with the Alpine orogenesis, and/or other subsequent tectonic events. Sr isotope ratios of the S. Donato Unit barite range from 0.707029 to 0.707103. These values are very similar (within 2σ) and consistent with direct precipitation of barite from seawater during Mid-Late Triassic time. This is in agreement with the synsedimentary features of the mineralizations and the depositional characteristics of the sedimentary series, within which the mineralization occurs. In this hypothesis, the volcanism, represented by outcrops of metabasic rocks, has played a secondary role contributing, probably, to an increased content of Ba and subordinately of Sr and metallic ions.
1984
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/11581/243128
 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??? ND
social impact