Results 31 to 40 of about 19,207 (163)
Nature Communications, 2018 The Earth’s mantle undergoes changes as temperature and pressure increase with depth. Here, the authors present a global interrogation of reflectors in the Earth’s mid-mantle revealing a significant variation in their properties, with widespread ...
Lauren Waszek +2 more
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Geochemistry, Geophysics, Geosystems, 2020 We investigate the relationship between the global distribution of deep slab dips (at 250‐ to 300‐km depth) and pressure and circulation in the upper mantle.
Adam F. Holt, Leigh H. Royden
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Breaking supercontinents; no need to choose between passive or active [PDF]
Solid Earth, 2017 Much debate has centred on whether continental break-up is predominantly caused by active upwelling in the mantle (e.g. plumes) or by long-range extensional stresses in the lithosphere.
M. Wolstencroft +2 more
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Large volcanic eruptions are mostly sourced above mobile basal mantle structures
Communications Earth & EnvironmentMost deep mantle plumes rise from hot basal mantle structures, creating large volcanic eruptions at Earth’s surface. In previous studies, mantle plumes were the implicit process connecting volcanic eruptions to hot basal mantle structures.
Annalise Cucchiaro +3 more
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Mantle flow and plate motions [PDF]
Geophysical Journal International, 1986 Summary. New data on mantle viscosity variation and plate motions suggest that the author’s previous theory for the forces driving and resisting plate tectonics needs revision. The flow in the mantle associated with plate movements probably pervades the whole mantle instead of being almost entirely in a thin asthenosphere at the top of it.
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Geodynamics of the Yellowstone hotspot and mantle plume: Seismic and GPS imaging, kinematics, and mantle flow [PDF]
Journal of Volcanology and Geothermal Research, 2009 Abstract Integration of geophysical and geological data show that the Yellowstone hotspot resulted from a mantle plume interacting with the overriding North America plate, a process that has highly modified continental lithosphere by magmatic and tectonic processes and produced the 16-17 Ma, 700-km-long Yellowstone-Snake River Plain (YSRP) silicic ...
Smith, B. +8 more
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Geochemistry, Geophysics, GeosystemsRifting is a tectonic process that leads to extensive magmatic activity, continental breakup, and the formation of new oceanic crust. The interplay between rifting and dynamic mantle flow driven by thermal heterogeneity in the mantle along the rift‐axis ...
Min‐Seok Jang, Byung‐Dal So
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Geochemistry, Geophysics, Geosystems, 2023 Rapid plate motion, alongside pronounced variations in age and thickness of the Australian continental lithosphere, makes it an excellent location to assess the relationship between seismic anisotropy and lithosphere‐asthenosphere dynamics. In this study,
C. M. Eakin +4 more
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Geochemistry, Geophysics, GeosystemsSeismic anisotropy is observed in the lowermost few hundred kilometers of the mantle. This anisotropy likely signifies strong deformation, possibly caused by mantle flow interacting with the edges of Large Low‐Shear‐Velocity Provinces (LLSVPs) or by the ...
Poulami Roy +3 more
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Geochemistry, Geophysics, Geosystems, 2023 Torn and bent slabs are usually associated with flat‐slab subduction where the descending plate develops a horizontal geometry beneath the overlying continent.
Xiaowen Liu, Russell Pysklywec
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