Zobrazeno 1 - 10
of 166
pro vyhledávání: '"Y. Lavallée"'
Autor:
Y. Lavallée, T. Miwa, J. D. Ashworth, P. A. Wallace, J. E. Kendrick, R. Coats, A. Lamur, A. Hornby, K.-U. Hess, T. Matsushima, S. Nakada, H. Shimizu, B. Ruthensteiner, H. Tuffen
Publikováno v:
Solid Earth, Vol 13, Pp 875-900 (2022)
The permeability of magma in volcanic conduits controls the fluid flow and pore pressure development that regulates gas emissions and the style of volcanic eruptions. The architecture of the permeable porous structure is subject to changes as magma d
Externí odkaz:
https://doaj.org/article/7405759b293c4452af0e5933d5458add
Autor:
J. E. Kendrick, L. N. Schaefer, J. Schauroth, A. F. Bell, O. D. Lamb, A. Lamur, T. Miwa, R. Coats, Y. Lavallée, B. M. Kennedy
Publikováno v:
Solid Earth, Vol 12, Pp 633-664 (2021)
Volcanoes represent one of the most critical geological settings for hazard modelling due to their propensity to both unpredictably erupt and collapse, even in times of quiescence. Volcanoes are heterogeneous at multiple scales, from porosity, which
Externí odkaz:
https://doaj.org/article/16fea115648447f3a3dfaad23e12170f
Autor:
R. Coats, J. E. Kendrick, P. A. Wallace, T. Miwa, A. J. Hornby, J. D. Ashworth, T. Matsushima, Y. Lavallée
Publikováno v:
Solid Earth, Vol 9, Pp 1299-1328 (2018)
The strength and macroscopic deformation mode (brittle vs. ductile) of rocks is generally related to the porosity and pressure conditions, with occasional considerations of strain rate. At high temperature, molten rocks abide by Maxwell's viscoela
Externí odkaz:
https://doaj.org/article/293888269a504fbbac63f6b372619e7a
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-12 (2017)
The rheological behaviour of magma in shallow conditions may help determine a volcano’s eruptive style. Here, the authors perform deformation experiments on lava from Volcán de Colima to demonstrate that crystal plasticity may preclude failure at
Externí odkaz:
https://doaj.org/article/9059afb6a9b5462186d7e67751a76706
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
Abstract The connectivity of rocks’ porous structure and the presence of fractures influence the transfer of fluids in the Earth’s crust. Here, we employed laboratory experiments to measure the influence of macro-fractures and effective pressure
Externí odkaz:
https://doaj.org/article/44491eadf6434177b124c201c9c50d89
Autor:
D. B. Dingwell, Y. Lavallée, K.-U. Hess, A. Flaws, J. Marti, A. R. L. Nichols, H. A. Gilg, B. Schillinger
Publikováno v:
Solid Earth, Vol 7, Iss 5, Pp 1383-1393 (2016)
Understanding the physicochemical conditions extant and mechanisms operative during explosive volcanism is essential for reliable forecasting and mitigation of volcanic events. Rhyolitic pumices reflect highly vesiculated magma whose bubbles can serv
Externí odkaz:
https://doaj.org/article/e1b64a9d97dc4c19b70815826c01cb94
Publikováno v:
Solid Earth, Vol 6, Iss 4, Pp 1277-1293 (2015)
Rhythmic seismicity associated with spine extrusion is a well-documented phenomenon at a number of dome-forming volcanic systems. At Unzen volcano, Japan, a 4-year dome-forming eruption concluded with the emplacement of a spine from October 1994 to F
Externí odkaz:
https://doaj.org/article/acf5fd74c1b14e458db2191bb8015d8d
Autor:
S. Wiesmaier, D. Morgavi, C. J. Renggli, D. Perugini, C. P. De Campos, K.-U. Hess, W. Ertel-Ingrisch, Y. Lavallée, D. B. Dingwell
Publikováno v:
Solid Earth, Vol 6, Iss 3, Pp 1007-1023 (2015)
In order to explore the materials' complexity induced by bubbles rising through mixing magmas, bubble-advection experiments have been performed, employing natural silicate melts at magmatic temperatures. A cylinder of basaltic glass was placed below
Externí odkaz:
https://doaj.org/article/2fab232275da4402b42c66375d639c52
Autor:
J. E. Kendrick, Y. Lavallée, K.-U. Hess, S. De Angelis, A. Ferk, H. E. Gaunt, P. G. Meredith, D. B. Dingwell, R. Leonhardt
Publikováno v:
Solid Earth, Vol 5, Iss 1, Pp 199-208 (2014)
Lava dome eruptions subjected to high extrusion rates commonly evolve from endogenous to exogenous growth and limits to their structural stability hold catastrophic potential as explosive eruption triggers. In the conduit, strain localisation in magm
Externí odkaz:
https://doaj.org/article/d8e5aafdc6af49e289c454560fc7ce86
Publikováno v:
Solid Earth, Vol 3, Iss 2, Pp 191-198 (2012)
Tuffisites, the products of subsurface fragmentation, transport and deposition, are common in explosive volcanic environments. Their study provides direct insight to the mechanical processes operating within volcanic conduits. Here we document the in
Externí odkaz:
https://doaj.org/article/8a42c62d67004c6d976e01f04a6cf42b