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Showing 1 to 11 of 11 for “"strombolian"”.
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The consequences of gas slug ascent in a stratified magma on Strombolian eruption dynamics
Strombolian volcanic activity, one of the most common on Earth, results from the bursting of large gas pockets (slugs) following ascent through relatively low-viscosity magma within the volcanic conduit. However, this paradigm was forged when the complex rheology of the magma at Stromboli, the …
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Drivers of Variation in the Eruptive and Magmatic Processes of a Persistently Active Volcano, Yasur, Vanuatu
… conduit processes and eruptive manifestations of Strombolian-style volcanism was conducted at Mt Yasur, on Tanna Island, Vanuatu. It comprised an 11-week, multi-component monitoring deployment that utilized seismometers, gas spectrometry, thermal-IR imagery and visual observations. From this, …
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Petrology and geochemistry of the recent eruption history at Rabaul Caldera, Papua New Guinea : implications for magmatic processes and recurring volcanic activity
… is characterised by intermittent vulcanian and strombolian eruptions that are restricted to Tavurvur, on the northeastern side of Rabaul Caldera...Comparison with dacite magma compositions erupted in 1937-1943, 1878, and during the recent prehistoric era and the presence of plagioclase …
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Petrology and geochemistry of the recent eruption history at Rabaul Caldera, Papua New Guinea : implications for magmatic processes and recurring volcanic activity
… is characterised by intermittent vulcanian and strombolian eruptions that are restricted to Tavurvur, on the northeastern side of Rabaul Caldera...Comparison with dacite magma compositions erupted in 1937-1943, 1878, and during the recent prehistoric era and the presence of plagioclase …
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Petrological insights into pre- and syn-eruptive degassing at Ambrym volcano, Vanuatu
… degassing from quasipermanent lava lakes, with Strombolian activity of fluctuating intensity. This is punctuated on an approximately decadal timescale by moderate sub-Plinian paroxysms, often accompanied by overflow of lava from the intracaldera cones and via flank fissures. This study focuses …
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Dynamics of ash eruptions at Vesuvius
… fragmented mixture, alternated with violent strombolian episodes. In this study we present morphological, textural and compositional data on the products of two ash eruptions representative of the whole variability of this activity at Vesuvius (Italy), occurred in the periods between the …
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Mafic volcanism in the Colorado Plateau/Basin-and-Range Transition Zone, Hurricane, Utah
… of the St. George basin in southwestern Utah. Strombolian-Hawaiian style eruptions produced thin (10 m) a'a lava flows and cinder (scoria) cones composed of vesicular basalt, bombs and agglutinate. Radiometric dating and geologic relationships demonstrate that the HVF formed over a period of at …
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The eruptions of Örӕfajökull 1362 (Iceland) and Lanzarote 1730-36 (Canary Islands) : sulphur emissions and volcanology
… basaltic fissure eruption involving Hawaiian and Strombolian fire fountain activity (eruption plumes 8-16 km high) generating a scoria fall deposit and lava flows (~5 km3 total volume). <br></br><br></br>Chapter 1 introduces the effects of volcanic gas release, and highlights the importance of …
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Monogenetic volcanism in the western Arabian Peninsula: Insights from Late Quaternary eruptions in northern Harrat Rahat, Kingdom of Saudi Arabia
… these dominantly reflect Hawaiian and/or Strombolian eruptive styles. Rare evidence of phreatomagmatism was found in one volcanic centre. Detailed geochemical study of individual centres, along with stratigraphic and physical volcanological descriptions, revealed that magma reaching the …
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Volcanic and sedimentary processes in phreatomagmatic volcanoes
… at depth but with time eruptions became more strombolian, as water was used up or failed to gain access to the vent. Surges were less common than in the Saefell eruption because the Medano water: magma ratio and explosion depth less often fulfilled the optimum conditions for surge production. …