http://www.cnr.it/ontology/cnr/individuo/prodotto/ID244016

Structural features of the July-August 2001 Mount Etna eruption: evidence for a complex magmatic system. (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Structural features of the July-August 2001 Mount Etna eruption: evidence for a complex magmatic system. (Articolo in rivista) (literal)

Anno

2003-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1144/0016-764902-151 (literal)

Alternative label

Lanzafame, G., Neri, M., Acocella, V., Billi, A., Funiciello, R., Giordano, G., (2003)
Structural features of the July-August 2001 Mount Etna eruption: evidence for a complex magmatic system.
in Journal of the Geological Society (Lond.); The Geological Society, London (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Lanzafame, G., Neri, M., Acocella, V., Billi, A., Funiciello, R., Giordano, G., (literal)

Pagina inizio

531 (literal)

Pagina fine

544 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

160 (literal)

Rivista

Journal of the Geological Society (Rivista)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Catania University, INGV, Roma Tre (literal)

Titolo

Structural features of the July-August 2001 Mount Etna eruption: evidence for a complex magmatic system. (literal)

Abstract

We describe the evolution of the volcanic activity and deformation patterns observed at Mount Etna during the July-August 2001 eruption. Seismicity started at 3000 in below sea level on 13 July, accompanied by moderate ground swelling. Ground deformation culminated on 16 July with the development of a NE-SW graben c. 500 in wide and c. I in deep in the Cisternazza area at 2600-2500 in above sea level on the southern slope of the volcano. On 17 July, the eruption started at the summit of Mount Etna from the SE Crater (central-lateral eruptive system), front which two radial, c. 30 in wide, c. 3000 in long fracture zones, associated with eruptive fissures, propagated both southward (17 July) and northeastward (20 July). On 18 July, a new vent formed at 2 100 in elevation, at the southern base of the Montagnola, followed on the next day by the opening of a vent further upslope, at 2550 in (eccentric eruptive system). The eruption lasted for 3 weeks. Approximately 80% of the total lava volume was erupted from the 2 100 in and the 2550 in vents. The collected structural data suggest that the Cisternazza graben developed as a passive local response of the volcanic edifice to the ascent of a north-south eccentric dyke, which eventually reached the ground surface in the Montagnola area (18-19 July). In contrast, the two narrow fracture zones radiating from the summit are interpreted as the lateral propagation, from the conduit of the SE Crater, of north-south- and NE-SW-oriented shallow dykes, 2-3 in wide. The evolution of the fracture pattern together with other volcanological data (magma ascent and effusion rate, eruptive style, petrochemical characteristics of the erupted products, and petrology of xenoliths within magma) suggest that the eccentric and central-lateral eruptions were fed by two distinct magmatic systems. Examples of eccentric activity accompanied by central-lateral events have never been described before at Etna. (literal)

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