Results 1 to 10 of about 1,147 (184)
Influence of the asthenosphere on earth dynamics and evolution. [PDF]
Sci Rep, 2023 AbstractThe existence of a thin, weak asthenospheric layer beneath Earth’s lithospheric plates is consistent with existing geological and geophysical constraints, including Pleistocene glacio-isostatic adjustment, modeling of gravity anomalies, studies of seismic anisotropy, and post-seismic rebound.
Cathles L +5 more
europepmc +6 more sources
Plug flow in the Earth's asthenosphere
Earth and Planetary Science Letters, 2018 Abstract Recent seismic observations, focused on mantle flow below the Pacific plate, indicate the presence of two shear layers in the Earth's asthenosphere. This is difficult to explain under the classic assumption of asthenosphere flow driven by plate shear from above.
Adrian Lenardic, Alana Semple
exaly +3 more sources
Geophysical and Geochemical Constraints on Neogene‐Recent Volcanism in the North American Cordillera
Geochemistry, Geophysics, Geosystems, 2021 Widespread recent volcanic rocks occur across the Cordillera landward of the current/recent volcanic arc Mexico to Alaska and most other subduction backarcs.
Roy D. Hyndman, Dante Canil
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The Nature of the Lithosphere‐Asthenosphere Boundary [PDF]
Journal of Geophysical Research: Solid Earth, 2020 AbstractPlate tectonic theory was developed 50 years ago and underpins most of our understanding of Earth's evolution. The theory explains observations of magnetic lineations on the seafloor, linear volcanic island chains, large transform fault systems, and deep earthquakes near deep sea trenches.
Rychert, Catherine A. +3 more
openaire +3 more sources
Dizhen xuebao, 2021 2010年智利马乌莱MW8.8地震发生在纳斯卡板块与南美板块的板块边界处，引起了显著的同震和震后效应。GPS台网数据显示记录到的同震海向位移最大约5 m，垂向沉降最大约50 cm。在经过对俯冲效应、季节变化等效应的校正后，震后6年的海向最大位移约68 cm，垂向抬升最大约20 cm。马乌莱地震显著的震后形变对该区域的地下三维黏弹性结构有良好的约束。本文建立了智利中南部俯冲带区域的三维有限元模型，黏弹性的地幔楔及海洋地幔均使用伯格斯体材料，并在断层面上设置2 km厚的软弱层以模拟震后余滑 ...
Yixing Zhang +2 more
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Geochemistry, Geophysics, Geosystems, 2020 The oceanic lithosphere is a primary component of the plate tectonic system, yet its evolution and its asthenospheric interaction have rarely been quantified by in situ imaging at slow spreading systems.
Nicholas Harmon +5 more
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Rifts, orogens, cratons, and global tectonics: Introduction
Геодинамика и тектонофизика, 2017 A key role in developing the Earth theory is played by comparative studies of orogens, rifts, and platforms in the equatorial, middle and high latitudes of Asia and the adjacent Arctic regions.
S. V. Rasskazov
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Space Weather, 2020 During magnetic storms, solar‐magnetosphere‐ionosphere‐Earth interactions give rise to geomagnetically induced currents (GICs) in man‐made technological conductors such as power grids, gas pipelines, and railway networks with potentially damaging ...
Fiona Simpson, Karsten Bahr
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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, Geosystems, 2021 The evolution of ocean lithosphere and asthenosphere are fundamental to plate tectonics, yet high resolution imaging is rare. We present shear wave velocity and azimuthal anisotropy models for the upper mantle from Rayleigh wave group velocities from ...
Utpal Saikia +3 more
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