Rendiconti Lincei

, Volume 1, Issue 4, pp 413–418 | Cite as

Rapporti isotopici dello stronzio in bariti e fluoriti di mineralizzazioni filoniane dell’area di Alcamo e Calatafimi (Sicilia, Italia)

  • Mario Barbieri
  • Adriana Bellanca
  • Rodolfo Neri
  • Luigia Tolomeo
  • M. Fornaseri
Geochimica
  • 26 Downloads

Riassunto

Nelle rocce carbonatiche Mesozoiche dellafacies «Trapanese», affioranti nella Sicilia Nord-occidentale, sono presenti alcune mineralizzazioni a barite e fluorite. Sulla base dei rapporti isotopici dello stronzio misurati sia nei minerali suddetti che nelle rocce incassanti è possibile ricostruire un modello genetico di derivazione dello stronzio dai livelli sapropelitici presenti nella serie stratigrafica locale.

Sr isotope composition in barite and fluorite from vein mineralizations near Alcamo and Calatafimi (Sicily, Italy): relevance for the element source

Abstract

Fluorite and/or barite mineralizations occur as vein and cavity fillings within Mesozoic carbonate rocks ofTrapanese facies outcropping in northwestern Sicily. The Sr isotope compositions of barite, fluorite and host rocks have been determined. The87Sr/86 Sr ratios suggest that both fluorite and barite originated from an isotopically homogeneous mineralizing fluid. The strontium source does not seem entirely connected with the wall rocks.87Sr/86 Sr enriched lithotypes such as evaporites of the Gessoso-Solfifera formation and marls with sapropelic levels present in the study area could be invoked as the materials interacting with the mineralizing fluids.

Key words

Sicily Fluorite Barite Sr isotopes 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Barbieri M., Bellanca A., Neri R. andTolomeo L., 1987.Use of strontium isotopes io determine the sources of hydrothermal fluorite and Barite from northwestern Sicily, Italy. Chem. Geol. (Isot. Geosc. Sect.), 66: 273–278.CrossRefGoogle Scholar
  2. Barbieri M., De Vivo E., Perrone V. andTurco E., 1984.Strontium geochemistry of the San Donato Unit barite mineralization (Calabria, Italy). Chem. Geol., 45: 279–288.CrossRefGoogle Scholar
  3. Barbieri M., Masi U. andTolomeo L., 1982.Strontium geochemistry in the epithermal deposits from the Apuan Alps (northern Tuscany, Italy). Chem. Geol., 35: 351–356.CrossRefGoogle Scholar
  4. Carapezza M., Cusimano G., Liguori V., Alalmo R., Dongarrà G. eHauser S., 1977.Nota introduttiva allo studio delle sorgenti termali dell’isola di Sicilia. Boll. Soc. Geol. It., 96: 813–836.Google Scholar
  5. Cuslmano G., Di Cara A., Liguori V. eMarescalchi P., 1982.Modello idrostrutturale dell’area termale Fiume Caldo-Castellammare del Golfo (Trapani). Rend. Soc. Geol. It., 5: 31–34.Google Scholar
  6. Dill H., 1988.Geologic setting and age relationship of fluorite-barite mineralization in southern Germany with special reference to the Late Paleozoic unconformity. Miner. Deposita, 23: 16–23.CrossRefGoogle Scholar
  7. Dill H. andCarl C., 1987.Sr isotope variation in vein barites from the NE Bavarian Basement: relevance for the source of elements and genesis of unconformity-related barite deposits. Miner. and Petrol, 36: 27–39.CrossRefGoogle Scholar
  8. Giunta G. eLiguori V., 1972.Geologia dell’estremità Nord-Occidentale della Sicilia. Riv. Min. Sicil., 136-138: 165–226.Google Scholar
  9. Homma H. andShuto K., 1979.On strontium isotopic ratio of barite from Kuroko-type ore deposits, Japan. J. Jpn. Assoc. Mineral. Petrogr. Econ. Geol, 74: 321–325.Google Scholar
  10. Kesler S. E. andJones L. M., 1981.Sulfur and strontium geochemistry of celestite. barite and gypsum from the Mesozoic basins of northern Mexico. Chem. Geol., 31: 211–224.CrossRefGoogle Scholar
  11. Kesler S. E., Ruiz J. andJones L. M., 1983.Strontium isotopic geochemistry of fluorite mineralization (Coabitila, Mexico). Isot. Geosci., 1: 65–75.Google Scholar
  12. Pirani R.., 1963.Studio petrografico dei prodotti delle manifestazioni eruttive di Alcamo (Monte Bonifato) e di Segesta (Monte Barbaro). Miner. Petrogr. Acta, 9: 1–18.Google Scholar
  13. Wedepohl K. H., 1978.Handbook of Geochemistry. II-4, 5C-K-4.5, Springer, Berlin.Google Scholar

Copyright information

© Accademia nazionale dei Lincei 1990

Authors and Affiliations

  • Mario Barbieri
    • 1
  • Adriana Bellanca
    • 1
  • Rodolfo Neri
    • 1
  • Luigia Tolomeo
    • 1
  • M. Fornaseri
    • 1
  1. 1.Dipartimento di Scienze della TerraSezione geochimica Università degli Studi di Roma «La Sapienza»Roma

Personalised recommendations