Search Results - "Hess, K. U."

A compositional tipping point governing the mobilization and eruption style of rhyolitic magma by Di Genova, D., Kolzenburg, S., Wiesmaier, S., Dallanave, E., Neuville, D. R., Hess, K. U., Dingwell, D. B.

“…Measurements of the composition-dependent viscosity of rhyolitic magma reveal a tipping point that changes the physical properties of the melt and controls the…”
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Atmosphere injection of sea salts during large explosive submarine volcanic eruptions by Colombier, M., Ukstins, I. A., Tegtmeier, S., Scheu, B., Cronin, S. J., Thivet, S., Paredes-Mariño, J., Cimarelli, C., Hess, K.-U., Kula, Taaniela, Latu’ila, Folauhola H., Dingwell, D. B.

“…The 15 January 2022 submarine eruption at Hunga volcano was the most explosive volcanic eruption in 140 years. It involved exceptional magma and seawater…”
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Preface – XIth Silicate Melt Workshop by Dingwell, D.B., Hess, K.-U., Richet, P., Wilke, M.

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Seismogenic lavas and explosive eruption forecasting by Lavallée, Y, Meredith, P. G, Dingwell, D. B, Hess, K.-U, Wassermann, J, Cordonnier, B, Gerik, A, Kruhl, J. H

“…Volcanic dome-building episodes commonly exhibit acceleration in both effusive discharge rate and seismicity before explosive eruptions. This should enable the…”
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Thermal weakening of the carbonate basement under Mt. Etna volcano (Italy): Implications for volcano instability by Heap, M.J., Mollo, S., Vinciguerra, S., Lavallée, Y., Hess, K.-U., Dingwell, D.B., Baud, P., Iezzi, G.

“…The physical integrity of a sub-volcanic basement is crucial in controlling the stability of a volcanic edifice. For many volcanoes, this basement can comprise…”
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Shear Rate‐Dependent Disequilibrium Rheology and Dynamics of Basalt Solidification by Kolzenburg, S., Giordano, D., Hess, K. U., Dingwell, D. B.

“…Magmas and lavas undergo a range of shear rates during transport and emplacement. Further, transport of magma and lava occurs at subliquidus conditions where…”
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Tracking the permeable porous network during strain-dependent magmatic flow by Kendrick, J.E., Lavallée, Y., Hess, K.-U., Heap, M.J., Gaunt, H.E., Meredith, P.G., Dingwell, D.B.

“…Rheological variations have been postulated as the cause of transitions from effusive to explosive volcanic eruption style. Rheology is integrally linked to…”
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The influence of thermal-stressing (up to 1000°C) on the physical, mechanical, and chemical properties of siliceous-aggregate, high-strength concrete by Heap, M.J., Lavallée, Y., Laumann, A., Hess, K.-U., Meredith, P.G., Dingwell, D.B., Huismann, S., Weise, F.

“…► Thermal microcracking initiates in HSC at 180°C. ► Strength, ultrasonic velocities, Young’s modulus, and Poisson’s ratio decrease with increasing…”
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Rheological properties of dome lavas: Case study of Unzen volcano by Cordonnier, B., Hess, K.-U., Lavallee, Y., Dingwell, D.B.

“…Transitions between effusive and explosive styles of lava dome eruptions are likely accompanied by changes in lava rheology. The common presence of crystals in…”
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Viscous heating in silicate melts: An experimental and numerical comparison by Cordonnier, B., Schmalholz, S. M., Hess, K.-U., Dingwell, D. B.

“…The transition from Newtonian to non‐Newtonian flow of silicate melts is commonly manifested as shear thinning at conditions of high stress and strain rate…”
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Magmatic architecture of dome-building eruptions at Volcán de Colima, Mexico by Lavallée, Yan, Varley, N. R., Alatorre-Ibargüengoitia, M. A., Hess, K.-U., Kueppers, U., Mueller, S., Richard, D., Scheu, B., Spieler, O., Dingwell, D. B.

“…Changes in the physical, chemical and rheological properties of ascending magma regulate the style of volcanic eruptions. Volcán de Colima’s eruptive cycles of…”
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Retrieving dissolved H2O content from micro-Raman spectroscopy on nanolitized silicic glasses: Application to volcanic products of the Paraná Magmatic Province, Brazil by González-García, D., Giordano, D., Allabar, A., Andrade, F.R.D., Polo, L.A., Janasi, V.A., Lucchetti, A.C.F., Hess, K.-U., De Campos, C.P., Dingwell, D.B.

“…Determining volatile content in silicate glasses has critical importance to evaluate the original water content of magmas and its evolution from storage to…”
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Intrinsic proton dynamics in hydrous silicate melts as seen by quasielastic neutron scattering at elevated temperature and pressure by Yang, F., Hess, K.-U., Unruh, T., Mamontov, E., Dingwell, D.B., Meyer, A.

“…We present quasielastic neutron scattering results on hydrous silica, sodium aluminosilicate, and sodium trisilicate melts with 10 mol% total water content,…”
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The rheology of peralkaline rhyolites from Pantelleria Island by Di Genova, D., Romano, C., Hess, K.-U., Vona, A., Poe, B.T., Giordano, D., Dingwell, D.B., Behrens, H.

“…The viscosity of pantelleritic melts from the Khaggiar lava flow (5.5ka — Pantelleria Island) was investigated as a function of temperature and water content…”
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A cooling rate bias in paleointensity determination from volcanic glass: An experimental demonstration by Ferk, A., Aulock, F. W. v., Leonhardt, R., Hess, K.-U., Dingwell, D. B.

“…The suitability of volcanic glass for paleointensity determinations is the basis of many studies. The dominant single domain (SD) magnetic remanence carriers,…”
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Vesiculation and Quenching During Surtseyan Eruptions at Hunga Tonga‐Hunga Ha'apai Volcano, Tonga by Colombier, M., Scheu, B., Wadsworth, F. B., Cronin, S., Vasseur, J., Dobson, K. J., Hess, K.‐U., Tost, M., Yilmaz, T. I., Cimarelli, C., Brenna, M., Ruthensteiner, B., Dingwell, D. B.

“…Surtseyan eruptions are shallow to emergent subaqueous explosive eruptions that owe much of their characteristic behavior to the interaction of magma with…”
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Paleointensities of phonolitic obsidian: Influence of emplacement rotations and devitrification by Ferk, A., Leonhardt, R., von Aulock, F. W., Hess, K.-U., Dingwell, D. B.

“…A paleomagnetic study on phonolitic obsidian from six sites in Tenerife, Spain is presented. Two sites are located at the 750 ka El Pasajiron at the southern…”
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Magma mixing enhanced by bubble segregation by Wiesmaier, S, Morgavi, D, Renggli, C. J, Perugini, D, De Campos, C. P, Hess, K.-U, Ertel-Ingrisch, W, Lavallée, Y, Dingwell, D. B

“…In order to explore the materials' complexity induced by bubbles rising through mixing magmas, bubble-advection experiments have been performed, employing…”
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Laboratory simulations of tensile fracture development in a volcanic conduit via cyclic magma pressurisation by Benson, Philip M., Heap, Michael J., Lavallée, Yan, Flaws, Asher, Hess, K.-U., Selvadurai, A.P.S., Dingwell, Donald B., Schillinger, B.

“…During volcanic unrest, high magma pressure induces cracking and faulting of the country rock, providing conduits for the transport of magma and other fluids…”
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Permeability of compacting porous lavas by Ashwell, P. A., Kendrick, J. E., Lavallée, Y., Kennedy, B. M., Hess, K.-U., von Aulock, F. W., Wadsworth, F. B., Vasseur, J., Dingwell, D. B.

“…The highly transient nature of outgassing commonly observed at volcanoes is in part controlled by the permeability of lava domes and shallow conduits. Lava…”
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