Studia Geophysica et Geodaetica

, Volume 40, Issue 3, pp 217–224 | Cite as

Magnetic stratigraphy of Etan products. I-medieval lavas

  • Antimo Angelino
  • Alberto Incoronato
  • Patrizia Sarno
Article

Summary

Mean magnetisation directions from 6 lava flows of questionable historical age have been determined. The results, which are based upon very stringent linearity criteria during demagnetisation, point out erroneous dating and the corresponding lavas can be ascribed to medieval activity of Mount Etna, as already suggested for some of the investigated flows, covering a time interval of some centuries around AD 1000. The site mean direction of AD 1536 historically dated lava flow agrees with a previous study (Tanguy et al., 1985), while the site mean directions of AD 1566 and AD 1169/812 differ significantly from those reported earlier. Neither AD 812 nor AD 1169 dating is consistent with the site mean direction of the related flow being compatible with an emplacement age possibly a few decades before AD 1000. The 3 lava flows historically dated AD 1595 exhibit different within site mean directions indicating that they cannot be referred to coeval activity of the volcano; the site mean direction of one of the flows is compatible with an emplacement occurring very close to AD 1000. The resulting SVC is significantly shifted eastwards with respect to that of previous study (Tanguy et al., 1985). However, its older part nearly overlaps the medieval Vesuvius SVC relocated to Etna. This indicates that the strict linearity analysis carried out during demagnetisation has allowed to clearly define the characteristic magnetisations of the investigated lava flows. The adopted procedure is appropriate for performing successful magnetic stratigraphy surveys in volcanic areas.

Keywords

palaeomagnetism geomagnetic secular variations Sicily 

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References

  1. Angelino A., 1996: Studio paleomagnetico di prodotti etnei.Laurea Thesis, University of Naples “Federico II” (in preparation, in Italian).Google Scholar
  2. Borgia A., Ferrari L. and Pasquarè G., 1992: Importance of gravitational spreading in the tectonic and volcanic evolution of Mount Etna.Nature 357, 231–232.CrossRefGoogle Scholar
  3. Carracedo J. C., Principe C., Rosi M. and Soler V., 1993: Time correlation by palaeomagnetism of the 1631 eruption of Mount Vesuvius. Volcanological and volcanic hazard implications. In: B. DeVivo, R. Scandone and T. Trigilia (eds.),“Mount Vesuvius”, J. Volc. Geoth. Res.,58, 203–209.Google Scholar
  4. Chevallier R., 1925: L'aimantation des laves de l'Etna et l'orientation du champ terrestre en Sicile du XIIe au XVIIe siècle.Annales Phys. 4, 5–162 (in French).Google Scholar
  5. Fisher R.A., 1953: Dispersion on a sphere.Proc. R. Soc. Ser. A 217, 295–305.Google Scholar
  6. Gialanella P.R., Incoronato A., Russo F. and Nigro G., 1993: Magnetic Stratigraphy of Vesuvius products. I — 1631 lavas. In: B. DeVivo, R. Scandone and T. Trigilia (eds.),“Mount Vesuvius”, J. Volc. Geoth. Res.,58, 211–215.Google Scholar
  7. Gialanella P.R., Incoronato A., Russo F., Sarno P., and Di Martino A., 1995: Magnetic stratigraphy of Vesuvius products. II — Medieval lavas.Quaternary Int. (in press).Google Scholar
  8. Hoye G.S., 1981: Archaeomagnetic secular variation record of Mount Vesuvius.Nature 291, 216–218.CrossRefGoogle Scholar
  9. Incoronato A., 1996: Magnetic stratigraphy in volcanic area. The experience at Vesuvius. In: A. Morris and D.H. Tarling (eds),“Palaeomagnetism and Tectonics of the Mediterranean Region”, Geol. Soc. Spec. Publ. 105, 367–371.Google Scholar
  10. Kirschvink J.L., 1980: The least squares line and plane and the analysis of paleomagnetic data.Geophys. J. R. Astr. Soc. 62, 669–718.Google Scholar
  11. Lo Giudice E., Patanè G., Rasà R and Romano R., 1982: The structural framework of Mt. Etna.Mem. Soc. Geol. It. 23, 125–158.Google Scholar
  12. Noel M. and Batt C.M., 1990: A method for correcting geographically separated remanence directions for the purpose of archaeomagnetic dating.Geophys. J. Int. 102, 753–756.Google Scholar
  13. Rolandi G. and Russo F., 1989: Contributo alla conoscenza dell'attività storica del Vesuvio: Dati stratigrafici e vulcanologici nel settore meridionale tra Torre del Greco, località Villa Inglese, e Torre Annunziata.Boll. Soc. Geol. It. 108, 521–536 (in Italian).Google Scholar
  14. Rolph T.C. and Shaw J., 1986: Variations of the geomagnetic field in Sicily.J. Geomagn. Geoelectr. 38, 1269–1277.Google Scholar
  15. Rolph T.C., Shaw J. and Guest J.E., 1987: Geomagnetic field variations as a dating tool: application to Sicilian lavas.J. Archaeol. Sci. 14, 215–225.Google Scholar
  16. Romano R., Sturiale C. and Lentini F., 1979: Carta geologica del monte Etna, scala 1:50.000.Progetto Finalizzato Geodinamica, CNR, Roma.Google Scholar
  17. Rosi M. and Santacroce R., 1986: L'attività del Somma-Vesuvio precedente l'eruzione del 1631. dati stratigrafici e vulcanologici. In: Albore Livadie C. (ed.),“Tremblement de terre, eruptions volcaniques et vie des hommes dans le Campanie antique”, Bibl. Inst. Franc. Naples 7, 15–33 (in French).Google Scholar
  18. Tanguy J.C., Bucur I. and Thompson J.F.C., 1985: Geomagnetic secular variation in Sicily and revised ages of historic lavas from Mount Etna.Nature 318, 453–455.CrossRefGoogle Scholar

Copyright information

© StudiaGeo s.r.o 1996

Authors and Affiliations

  • Antimo Angelino
    • 1
  • Alberto Incoronato
    • 1
  • Patrizia Sarno
    • 1
  1. 1.Dipartimento di Scienze della TerraUniversità degli Studi di Napoli “Federico II”NapoliItaly

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