New archeomagnetic and 226Ra-230Th dating of recent lavas for the Geological map of Etna volcano

Auteur :
TANGUY, J.-C.

Description :
This work deals with the dating of Mount Etna lava flows and eruptive fissure deposits to the last four millennia following field investigations and stratigraphic data. In most cases the results allow attributing ages to the historical period, although 2 flows are shown to be prehistoric. Although 60% of these volcanics exhibit ages comprised between 700 AD and 1850, only one (1285) is mentioned by contemporary written accounts. The AA. conclude that i) historical documents alone are insufficient to reconstruct a coherent sequence of eruptions, and ii) a multidisciplinary approach is necessary to obtain a comprehensive eruptive history of such a very active volcano. Thanks to these new archeomagnetic and 226Ra-230Th data coupled with stratigraphic data, a comprehensive volcanic history of the still-outcropping Mount Etna volcanics is now available for the last 2,400 years. - (NF)


Type de document :
Article de périodique

Source :
Italian Journal of Geosciences (Testo stampato), issn : 2038-1719, 2012, vol. 131, n°. 2, p. 241-257, nombre de pages : 17, Références bibliographiques : 162 ref.

Date :
2012

Editeur :
Pays édition : Italie, Roma, Società Geologica Italiana