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Showing 1–13 of 13 results
Advanced filters: Author: Josef Dufek Clear advanced filters

  • Super-eruptions require high magma supply rates. Numerical simulations show that even for volcanoes with low supply rates, the warming influence of magma on the crust prevents solidification, allowing super-eruption volumes of magma to accumulate.

    • Ozge Karakas
    • Wim Degruyter
    • Josef Dufek
    Research
    Nature Geoscience
    Volume: 10, P: 446-450

  • Jones et al., use a laboratory apparatus to perform rheological measurements on real gas-pyroclast mixtures to uncover the flow properties of pyroclastic density currents, a lethal volcanic hazard.

    • Thomas. J. Jones
    • Abhishek Shetty
    • Helge M. Gonnermann
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • Felsic rocks have not been identified on Mars, a planet that lacks plate tectonics to drive the magmatic processes that lead to evolved silica-rich melts. Spectral observations by the Mars Reconnaissance Orbiter indicate that felsic lithologies occur at multiple localities on Mars and suggest prolonged magmatic activity on ancient Mars.

    • James J. Wray
    • Sarah T. Hansen
    • Mark S. Ghiorso
    Research
    Nature Geoscience
    Volume: 6, P: 1013-1017

  • Volcanic eruptions can inject hazardous ash clouds into the atmosphere. Numerical simulations and experiments on volcanic rock samples show that clasts initially formed deep in the volcanic conduit break-up during collisions in the conduit, thus generating fine-grained clouds of ash.

    • Josef Dufek
    • Michael Manga
    • Ameeta Patel
    Research
    Nature Geoscience
    Volume: 5, P: 561-564

  • Explosive volcanic eruptions of Kīlauea in Hawaii can be explained by sudden subsidence of reservoir roof rock causing gas and lithic debris venting by a mechanism similar to that of a stomp rocket, according to seismic inversions for reservoir pressure changes.

    • Josh Crozier
    • Josef Dufek
    • Chao Liang
    Research
    Nature Geoscience
    Volume: 17, P: 572-578

  • Fragmentation-induced fluidization occurs in concentrated pyroclastic density currents where rapid particle breakage causes flow compaction and subsequent high pore fluid pressure, reducing friction and explaining their long runout.

    • Eric C. P. Breard
    • Josef Dufek
    • Braden Walsh
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-12

  • Dunes may form on Jupiter’s moon Io. Despite a tenuous atmosphere, interactions between widespread lava and sulfur dioxide frost may produce vapor flows dense enough to mobilize sand grains. Ridge-like features may be evidence of this phenomenon.

    • George D. McDonald
    • Joshua Méndez Harper
    • Laura Kerber
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • The hazards of pyroclastic surges remain poorly mitigated globally. Here, the authors show that their destructiveness is amplified by turbulent excursions of dynamic pressure energy that focusses inside the largest eddies and internal gravity waves.

    • Ermanno Brosch
    • Gert Lube
    • Luke Fullard
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-12

  • Carbon dioxide and helium data support lateral advection of carbon-rich cratonic mantle below the East African Rift System, which concentrates deep carbon and causes active carbonatite magmatism near the craton edge.

    • James D. Muirhead
    • Tobias P. Fischer
    • Cynthia J. Ebinger
    Research
    Nature
    Volume: 582, P: 67-72

  • Pyroclastic density currents are able to travel large distances because they generate their own air lubrication, according to large-scale laboratory experiments.

    • Gert Lube
    • Eric C. P. Breard
    • Ting Wang
    Research
    Nature Geoscience
    Volume: 12, P: 381-386

  • Pyroclastic density currents are complex multiphase flows originating from volcanic eruptions and account for almost a third of volcanic fatalities globally. This Review discusses recent advances in understanding of the complex internal processes within pyroclastic density currents and how these influence the flow dynamics and hazard footprints.

    • Gert Lube
    • Eric C. P. Breard
    • Brittany Brand
    Reviews
    Nature Reviews Earth & Environment
    Volume: 1, P: 348-365