Academic literature on the topic 'Pyroclast generation'

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Journal articles on the topic "Pyroclast generation"

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Shea, Thomas, Lucia Gurioli, Bruce F. Houghton, Raffaello Cioni, and Katharine V. Cashman. "Column collapse and generation of pyroclastic density currents during the A.D. 79 eruption of Vesuvius: The role of pyroclast density." Geology 39, no. 7 (2011): 695–98. http://dx.doi.org/10.1130/g32092.1.

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Thouret, J. C., J. Ramírez C., B. Gibert-Malengreau, et al. "Volcano–glacier interactions on composite cones and lahar generation: Nevado del Ruiz, Colombia, case study." Annals of Glaciology 45 (2007): 115–27. http://dx.doi.org/10.3189/172756407782282589.

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AbstractThe catastrophic lahars triggered by the 13 November 1985 eruption of the ice-clad Nevado del Ruiz volcano, Colombia, demonstrate that the interaction of hot pyroclasts with snow and ice can release 30–50 millionm3 of meltwater in 30–90 minutes. The 1985 eruption caused a 16% loss in area and a 9% loss in volume of snow, firn and ice. Turbulent pyroclastic density currents mechanically mixed with snow and produced meltwater at a rate of 0.5–1.6mms–1. Laboratory experiments suggest that turbulent, fluidized pyroclastic density currents exert mechanical and thermal scour, thereby efficie
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Huguet, David, Jean-Claude Thouret, Pierre Nehlig, Jeannine Raffy, and Pierre Rochette. "Les lahars du strato-volcan du Cantal (Massif central, France); stratigraphie, modes de mise en place et implications paleo-geomorphologiques." Bulletin de la Société Géologique de France 172, no. 5 (2001): 573–85. http://dx.doi.org/10.2113/172.5.573.

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Abstract Introduction: The study of lahar (Lh) deposits (a) describes sedimentary facies associations in a volcano-sedimentary system, (b) establishes the identification of criteria to recognize epiclastic deposits in fossil volcanic successions [Thouret, 1999] and (c) reconstructs paleo-landforms (stratocones, paleovalleys, and volcaniclastic fans) in an old volcanic massif. Lh deposits form the "complexe conglomeratique superieur" ("upper conglomeratic complex") [Brousse et al., 1972, 1975, 1977, 1980, 1989] associated with pyroclastic deposits and streamflow deposits above the "breche infer
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Lube, Gert, Eric C. P. Breard, Jim Jones, et al. "Generation of air lubrication within pyroclastic density currents." Nature Geoscience 12, no. 5 (2019): 381–86. http://dx.doi.org/10.1038/s41561-019-0338-2.

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Olivares, Lucio, Emilia Damiano, Nadia Netti, and Martina de Cristofaro. "Geotechnical Properties of Two Pyroclastic Deposits Involved in Catastrophic Flowslides for Implementation in Early Warning Systems." Geosciences 9, no. 1 (2018): 24. http://dx.doi.org/10.3390/geosciences9010024.

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Air-fall pyroclastic deposits on steep slopes in Campania (Southern Italy) are periodically subjected to rainfall-induced landslides that may evolve into catastrophic flowslides. To protect built-up areas, early warning systems (EWSs) have been implemented which are essentially based on pluviometric thresholds or models unable to accurately monitor the physical phenomena responsible for flowslide generation in pyroclastic deposits. Over the last 20 years, landslides with no evolution in flows occurred in this area and the alarms generated by existing EWSs in the cases of rainfall were both fal
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Sulpizio, Roberto, Pierfrancesco Dellino, Daniela Mele, and Luigi La Volpe. "Generation of pyroclastic density currents from pyroclastic fountaining or transient explosions: insights from large scale experiments." IOP Conference Series: Earth and Environmental Science 3 (October 1, 2008): 012020. http://dx.doi.org/10.1088/1755-1307/3/1/012020.

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Kaminski, Édouard, and Claude Jaupart. "Marginal stability of atmospheric eruption columns and pyroclastic flow generation." Journal of Geophysical Research: Solid Earth 106, B10 (2001): 21785–98. http://dx.doi.org/10.1029/2001jb000215.

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Slovenec, Damir, Josip Halamić, and Branimir Šegvić. "Middle Triassic basaltic pyroclastic rocks from the Mt. Medvednica ophiolitic mélange (NW Croatia): petrology, geochemistry and tectono-magmatic setting." Geologia Croatica 77, no. 2 (2024): 57–68. http://dx.doi.org/10.4154/gc.2024.06.

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Hectometric blocks of Middle Triassic mafic pyroclastic rocks, represented by volcanic agglomerates/breccias and lapilli tuffs, form part of the ophiolitic mélange of Mt. Medvednica, situated in the southwestern segment of the Zagorje-Mid-Transdanubian Zone. These rocks share petrochemical characteristics with pyroclastic derivatives of alkali, within-plate basaltic lavas of Mts. Medvednica, Samoborska Gora, and Kalnik, indicating the occurrence of explosive events preceding the dominant effusive submarine volcanism during the Middle Triassic (Illyrian-Fassanian?) stages. The formation of thes
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De Angelis, S., V. Bass, V. Hards, and G. Ryan. "Seismic characterization of pyroclastic flow activity at Soufrière Hills Volcano, Montserrat, 8 January 2007." Natural Hazards and Earth System Sciences 7, no. 4 (2007): 467–72. http://dx.doi.org/10.5194/nhess-7-467-2007.

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Abstract. A partial dome collapse with concurrent pyroclastic flow (PF) activity occurred at Soufrière Hills Volcano (SHV), Montserrat on 8 January 2007. Pyroclastic density currents were observed to propagate from the Northwest and West sectors of the summit dome into the heads of Tyres Ghaut and Gages Valley, respectively. Between 10:00 and 10:15 UTC pyroclastic flows entered Tyres Ghaut and from there descended into the Belham Valley reaching a distance of about 5 km from the source. Pyroclastic flow activity on the Northwest and West side of the edifice continued at high levels over the fo
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Sato, Hiroaki, Toshitsugu Fujii, and Setsuya Nakada. "Crumbling of dacite dome lava and generation of pyroclastic flows at Unzen volcano." Nature 360, no. 6405 (1992): 664–66. http://dx.doi.org/10.1038/360664a0.

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Dissertations / Theses on the topic "Pyroclast generation"

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Küppers, Ulrich. "Nature and efficiency of pyroclast generation from porous magma insights from field investigations and laboratory experiments /." [S.l.] : [s.n.], 2005. http://edoc.ub.uni-muenchen.de/archive/00004587.

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Küppers, Ulrich. "Nature and efficiency of pyroclast generation from porous magma: Insights from field investigations and laboratory experiments." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-45876.

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Kueppers, U. "Nature and efficiency of pyroclast generation from porous magma: Insights from field investigations and laboratory experiments." Thesis, 2005. http://hdl.handle.net/2122/1169.

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Enhanced knowledge of pre- and syn-eruptive processes is vital to deal with the increasing threat imposed to population and infrastructure by volcanoes that have been active historically and may potentially erupt in future. For many years, most of this knowledge was received from experiments on analogue materials and/or numerical models. In order to increase their significance and applicability for the “real” case, the natural complexity may not be oversimplified and the input parameters must be reliable and realistic. In the light of this, a close connection of field and laboratory work is es
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Küppers, Ulrich [Verfasser]. "Nature and efficiency of pyroclast generation from porous magma : insights from field investigations and laboratory experiments / vorgelegt von Ulrich Küppers." 2005. http://d-nb.info/978063759/34.

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Book chapters on the topic "Pyroclast generation"

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Wang F.W., Tanaka Y., and Nakamura K. "Fluidization mechanisms of flowslides triggered by earthquake and rainfall." In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2005. https://doi.org/10.3233/978-1-61499-656-9-2607.

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The difference between the fluidization mechanisms of the Tsukidate flowslide triggered by earthquake and the Yamashina flowslides induced by rainfall was examined through field investigations, soil tests and numerical simulations. In the case of the Tsukidate flowslide, after a liquefaction of sliding mass, the combination effect of grain crushing and rapid shearing rate of the pyroclastic material on the excess pore pressure generation was concluded as the main reason. While, in the case of the Yamashina flowslides, the low shear strength mobilized in the fully saturated weathered mudstone debris with a very low permeability was attributed to the high mobility of the flowslides.
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Pilco, Richard, and Sean McCann. "Chapter 22: Gold Deposits of the Yanacocha District, Cajamarca, Peru." In Geology of the World’s Major Gold Deposits and Provinces. Society of Economic Geologists, 2020. http://dx.doi.org/10.5382/sp.23.22.

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Abstract The Yanacocha district of northern Peru has produced >37 million ounces (Moz) Au since production commenced in 1993. Recognized as one of the world’s most prolific high-sulfidation epithermal gold districts, its discovery was made over a four-year period (1984–1988) through a joint venture alliance operated by Newmont Corporation. Over the past 30 years the geologic understanding of the district has been enhanced by research and documentation by many academic and Newmont geoscientists. The gold deposits are hosted within Tertiary volcanic rocks consisting of pyroclastic sequences cut by several generations of breccias and intrusions, all of which have undergone silicic and advanced argillic alteration. A dominant NE-trending structural corridor bounds all deposits in the district, and local northwest fault intersections with this trend are complimentary controls on mineralization. There are 12 major deposits discovered and exploited at Yanacocha. The largest, Cerro Yanacocha, has produced >17.5 Moz Au, whereas the newest deposit to be delineated, Antonio, has a >1.0 Moz resource. The depletion of shallow, supergene-oxidized deposits has necessitated the current underground development to exploit deeper sulfide deposits. Significant potential remains within the Yanacocha district in both oxide and sulfide deposits, and ongoing exploration efforts, are leveraging learnings from mined deposits and advances in exploration technologies and tools to extend the mine life.
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