1,721,111 research outputs found
Caratteristiche litologiche delle piroclastiti associate alla genesi dei maar di Monticchio: prima segnalazione di depositi carbonatitici-melilititici al M. Vulture (Basilicata).
No full textUBSU e cartografia geologica: problemi e potenzialità dell’utilizzo delle UBSU per l’interpretazione e la rappresentazione cartografica dei depositi quaternari vulcanici. L’esempio dei fogli n.451 “Melfi” e n. 452 “Rionero in Vulture”
No full textC. Principe & P. Giannandrea, Ubsu inside geological mapping: the use of the unconformity bounded stratigraphic units
in the chartography of the quaternary volcanic deposits - the exemples of melfi (n. 451) and rionero (n.452) areas.
By means of the use of the Unconformity Bounded Stratigraphic Units the sedimentary and volcanic stratigraphic successions outcropping
in the area of Mount Vulture volcano (n.451 “Melfi” and n.452 “Rionero in Vulture”) has been subdivided in synthematic units.
Unconformity use hallowed to define two Supersynthems and five Synthems. The synthematic subdivision over passed the limits of the
chartographed area and make possible the correlations of deposits on a wider area. The clear and objective criteria on witch
Sybthematic units are based resulted in an improvement of geological significance and in the volcanological detail of the chartographed
areas
Comment on: Carbonatites in a subduction system: the Pleistocene alvikites from Mount Vulture (Southern Italy)by d'Orazio et al., (2007)
No full text[D'Orazio, M., Innocenti, F., Tonarini, S., Doglioni, C., 2007. Carbonatites in a subduction system: the Pleistocene alvikites
from Mt. Vulture (southern Italy). Lithos 98, 313–334] describe a new finding of alvikite Ca-carbonatite at Vulture. They stress its
importance as being the first carbonatite to be discovered in a subduction environment. They suggest that this rock is different from
the other Italian carbonatites, considered as ‘rocks sharing a carbonatitic affinity’, which are radiogenic and chemically diluted by
addition of sedimentary limestone. They note that Vulture ‘alvikite’ is not diluted and is very unradiogenic with respect to other
Italian carbonatites. However, they maintain that Vulture ‘alvikite’ carbonate is derived from subducted limestones. We present an
account of the field relationships relating to the above-mentioned rocks, setting the geological and petrographic records straight and
describing pyroclastic rocks. We did not find that these rocks are formed from alvikite dykes or lava, but instead recognised them to
be a continuous blanket of ‘flaggy’, welded tuff. We found that the rocks consist of physically separated melilitite and carbonatite
juvenile lapilli settled into a carbonatite ash matrix form the rock. We disagree with the geochemical interpretation of the rock by
[D'Orazio, M., Innocenti, F., Tonarini, S., Doglioni, C., 2007. Carbonatites in a subduction system: the Pleistocene alvikites from
Mt. Vulture (southern Italy). Lithos 98, 313–334], and are particularly concerned by their conclusion of its carbonate origin. We
remark on the rock's geodynamic assignment in the frame of an extensional tectonic setting, also referring to the other Italian
carbonatite occurrences. We reject any ad hoc modified subduction as a direct source of Vulture and Italian carbonatites.
© 2007 Elsevier B.V. All rights reserved
Guidebook of the field excursion to Phlegrean Fields and Vesuvius. Workshop on explosive volcanism
No full textguida vulcanologic
Chemical zoning and colour changes in the phases of the sodalite group from the Mt. Vulture haüynophyre lava (Potenza-Italy)
No full textComments on: Carbonatites in a subduction system: The Pleistocene alvikites from Mt. Vulture (southern Italy) by d'Orazio et al., (2007)
No full text[D'Orazio, M., Innocenti, F., Tonarini, S., Doglioni, C., 2007. Carbonatites in a subduction system: the Pleistocene alvikites
from Mt. Vulture (southern Italy). Lithos 98, 313–334] describe a new finding of alvikite Ca-carbonatite at Vulture. They stress its
importance as being the first carbonatite to be discovered in a subduction environment. They suggest that this rock is different from the other Italian carbonatites, considered as ‘rocks sharing a carbonatitic affinity’, which are radiogenic and chemically diluted by addition of sedimentary limestone. They note that Vulture ‘alvikite’ is not diluted and is very unradiogenic with respect to other Italian carbonatites. However, they maintain that Vulture ‘alvikite’ carbonate is derived from subducted limestones. We present an account of the field relationships relating to the above-mentioned rocks, setting the geological and petrographic records straight and describing pyroclastic rocks. We did not find that these rocks are formed from alvikite dykes or lava, but instead recognised them to be a continuous blanket of ‘flaggy’, welded tuff. We found that the rocks consist of physically separated melilitite and carbonatite juvenile lapilli settled into a carbonatite ash matrix form the rock. We disagree with the geochemical interpretation of the rock by [D'Orazio, M., Innocenti, F., Tonarini, S., Doglioni, C., 2007. Carbonatites in a subduction system: the Pleistocene alvikites from Mt. Vulture (southern Italy). Lithos 98, 313–334], and are particularly concerned by their conclusion of its carbonate origin. We remark on the rock's geodynamic assignment in the frame of an extensional tectonic setting, also referring to the other Italian
carbonatite occurrences. We reject any ad hoc modified subduction as a direct source of Vulture and Italian carbonatites
Comment on "Historical measurements of the Earth's magnetic field compared with remanence directions from lava flows in Italy over the last four centuries" by R. Lanza, A. Meloni, and E. Tema
No full text
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