Bulletin Volcanologique
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Growth of volcanic ash aggregates in the presence of liquid water and ice: an experimental approach
Bulletin Volcanologique - Tập 74 Số 9 - Trang 1963-1984 - 2012
40Ar/39Ar ages of the AD 79 eruption of Vesuvius, Italy
Bulletin Volcanologique - Tập 69 - Trang 259-263 - 2006
The Italian volcano, Vesuvius, erupted explosively in AD 79. Sanidine from pumice collected at Casti Amanti in Pompeii and Villa Poppea in Oplontis yielded a weighted-mean 40Ar/39Ar age of 1925±66 years in 2004 (1σ uncertainty) from incremental-heating experiments of eight aliquants of sanidine. This is the calendar age of the eruption. Our results together with the work of Renne et al. (1997) and...... hiện toàn bộ
Acid and basic late neogene volcanism in central aegean sea: Its nature and geotectonic significance
Bulletin Volcanologique - Tập 45 - Trang 87-97 - 1982
Local eruptions of acid volcanic rocks occurred in the Central Aegean region around the Miocene-Pliocene boundary. Rhyolites outcrop on the Island of Antiparos, located in the central part of the Attic-Cycladic Massif. The age of these volcanic rocks ranges from 4.0 to 5.4 m.y., and chemical and Sr isotopic data suggest they were generated by partial melting of the continental crust. At the same t...... hiện toàn bộ
Morphological complexities and hazards during the emplacement of channel-fed `a`ā lava flow fields: A study of the 2001 lower flow field on Etna
Bulletin Volcanologique - Tập 72 - Trang 641-656 - 2010
Long-lived basaltic eruptions often produce structurally complex, compound `a`ā flow fields. Here we reconstruct the development of a compound flow field emplaced during the 2001 eruption of Mt. Etna (Italy). Following an initial phase of cooling-limited advance, the reactivation of stationary flows by superposition of new units caused significant channel drainage. Later, blockages in the channel ...... hiện toàn bộ
Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia)
Bulletin Volcanologique - Tập 57 - Trang 185-196 - 1995
The Gross Brukkaros inselberg is a dome structure with a crater-shaped central depression within Precambrian/Cambrian country rocks which was active as a depocenter during the Late Cretaceous. The formation of the structure was due to the intrusion and subsequent intermittent depletion of a shallow magma reservoir. Juvenile material has not been recognized hitherto. This is the first account of ju...... hiện toàn bộ
Mode of formation of an earliest Pliocene — Latest Miocene, basaltic, pillow-lava pile present at Pentecost island, new Hebrides, and its bearing on the formation of basaltic rudite
Bulletin Volcanologique - Tập 43 - Trang 505-510 - 1980
A well exposed, gently tilted, 400 m-high, earliest Pliocene-Latest Miocene, basaltic, pillow-lava pile in Northern Pentecost, New Hebrides contains two large rafts of sediment. These rafts are considered to be important in unravelling how such deep water, pillow-lavapiles develop. It is thought that after early laccolithic intrusion beneath a sediment cover, possibly only 10 m thick, that lava bu...... hiện toàn bộ
Soil CO2 degassing on Mt Etna (Sicily) during the period 1989–1993: discrimination between climatic and volcanic influences
Bulletin Volcanologique - Tập 57 - Trang 52-60 - 1995
Wide variations were measured in the diffuse CO2 flux through the soils in three selected areas of Mt Etna between August 1989 and March 1993. Degassing of CO2 from the area of Zafferana Etnea-S. Venerina, on the eastern slope of the volcano, has been determined to be more strongly influenced by meteorological parameters than the other areas. The seasonal component found in the data from this area...... hiện toàn bộ
Sur l’importance et l’extension du volcanisme récent de Nawar (Afghanistan)
Bulletin Volcanologique - Tập 28 - Trang 107-118 - 1965
Reconnaissance d’une importante zone volcanique à l’Ouest de Ghazni, en Afghanistan. Les volcans, au nombre de quarante au moins, sont généralement dacitiques, avec quelques roches basiques de la même famille; une énorme masse de tufs couvre toute la région. Ce volcanisme, qui s’étend sur une surface estimée à 4000 km2, est récent, d’âge pléistocène. Il constitue un jalon important entre le Demave...... hiện toàn bộ
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