Results 191 to 200 of about 3,661 (237)
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Creeping subduction zones are weaker than locked subduction zones
Nature Geoscience, 2017Faults that are fully or partially locked pose the greatest seismic hazard because they accumulate stress that can then be released in large earthquakes. In contrast, other faults continuously creep. The creeping versus locked behaviour is probably related to the frictional properties of the fault and the effective normal stress on the fault, but it is
Jeanne L. Hardebeck, John P. Loveless
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Viscosity of Fluids in Subduction Zones
Science, 2004The viscosities of aqueous fluids with 10 to 80 weight percent dissolved silicates have been measured at 600° to 950°C and 1.0 to 2.0 gigapascals by in situ observation of falling spheres in the diamond anvil cell. The viscosities at 800°C range from 10 –4 to 10 0.5 pascal seconds.
Andreas, Audétat, Hans, Keppler
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Physics of the Earth and Planetary Interiors, 2001
Rheological flow laws can be obtained from studies using multi-anvil high-pressure systems with synchrotron-based piezometers and strain metrics. The high flux X-ray source provides minute-scale time resolution with accurate measurement of diffraction patterns and direct sample images. Measurements of length changes with an accuracy of one part in 10 4
Donald J Weidner +5 more
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Rheological flow laws can be obtained from studies using multi-anvil high-pressure systems with synchrotron-based piezometers and strain metrics. The high flux X-ray source provides minute-scale time resolution with accurate measurement of diffraction patterns and direct sample images. Measurements of length changes with an accuracy of one part in 10 4
Donald J Weidner +5 more
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Subduction invasion of the Atlantic by Mediterranean subduction zones
2022<p>Subduction invasion has been referred to as the process by which subduction zones from a subducting ocean invade or trigger subduction initiation in a contiguous ocean. This can, in principle, happen in different ways that can vary from a direct migration by rollback along an oceanic corridor connecting the two oceans (e.g., the ...
João C. Duarte +3 more
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2009
Subduction is a major process that plays a first-order role in the dynamics of the Earth. The sinking of cold lithosphere into the mantle is thought by many authors to be the most important source of energy for plates driving forces. It also deeply modifies the thermal and chemical structure of the mantle, producing arc volcanism and is responsible for
Lallemand, Serge, Funiciello, F.
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Subduction is a major process that plays a first-order role in the dynamics of the Earth. The sinking of cold lithosphere into the mantle is thought by many authors to be the most important source of energy for plates driving forces. It also deeply modifies the thermal and chemical structure of the mantle, producing arc volcanism and is responsible for
Lallemand, Serge, Funiciello, F.
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Science, 2018
Geophysics Subduction zones are responsible for the most-damaging and tsunami-generating great earthquakes. Hayes et al. updated their Slab1.0 model to include all seismically active subduction zones, including geometrically complex regions like the Philippines.
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Geophysics Subduction zones are responsible for the most-damaging and tsunami-generating great earthquakes. Hayes et al. updated their Slab1.0 model to include all seismically active subduction zones, including geometrically complex regions like the Philippines.
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2015
In this chapter, we review recent seismic tomography studies of subduction zones and new insights into arc magmatism, seismotectonics and subduction dynamics. Seismic velocity and attenuation tomography clearly reveals subducting slabs as high-velocity and low-attenuation zones, where intermediate-depth and deep earthquakes occur.
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In this chapter, we review recent seismic tomography studies of subduction zones and new insights into arc magmatism, seismotectonics and subduction dynamics. Seismic velocity and attenuation tomography clearly reveals subducting slabs as high-velocity and low-attenuation zones, where intermediate-depth and deep earthquakes occur.
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Subduction zones of the western Mediterranean.
2008Subduction zones of the western Mediterranean have been extensively studied during the last three decades, through their geologic, petrologic, geophysical, kinematic, and structural features. A synthesis of available data, along with their tectonic interpretation, has been published by FACCENNA et alii (2001).
SCHETTINO, Antonio +4 more
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Tectonophysics, 2013
Abstract The Moho in subduction zones exists in two distinct forms, one associated with the subducting oceanic plate and second with the overriding plate. The seismic expression of both forms is linked to the nature of a landward dipping, low-velocity zone (LVZ) that has been detected in a majority of subduction zones about the globe and that ...
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Abstract The Moho in subduction zones exists in two distinct forms, one associated with the subducting oceanic plate and second with the overriding plate. The seismic expression of both forms is linked to the nature of a landward dipping, low-velocity zone (LVZ) that has been detected in a majority of subduction zones about the globe and that ...
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2004
Lay people asked to name notable or particularly dangerous volcanoes are likely to come forth with names such as Krakatau, Mt. St. Helens, Pinatubo, Mt. Pelee, Vesuvius or Santorini. These are all volcanoes that have grown above subduction zones, and all have produced catastrophic or at least highly explosive eruptions.
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Lay people asked to name notable or particularly dangerous volcanoes are likely to come forth with names such as Krakatau, Mt. St. Helens, Pinatubo, Mt. Pelee, Vesuvius or Santorini. These are all volcanoes that have grown above subduction zones, and all have produced catastrophic or at least highly explosive eruptions.
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