Results 1 to 10 of about 21,832 (251)

The asthenosphere low-velocity layer

open access: yesAnnals of Geophysics, 1959
Bisultati basati su osservazioni di vari fenomeni provano praticamentel'esistenza di un canale astenosferico a flessione di velocità, diffuso in tuttala terra.
B. Gutenberg
doaj   +4 more sources

Geophysical and Geochemical Constraints on Neogene‐Recent Volcanism in the North American Cordillera

open access: yesGeochemistry, 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
doaj   +1 more source

Seismic anisotropy across Adria plate, from the Apennines to the Dinarides

open access: yesFrontiers in Earth Science, 2022
The Adria microplate has the particular feature to be involved in two subduction systems with slab dipping in opposite directions, one toward west beneath the Apennines and the other to the east beneath the Dinarides.
S. Salimbeni   +6 more
doaj   +1 more source

Evolution of the Oceanic Lithosphere in the Equatorial Atlantic From Rayleigh Wave Tomography, Evidence for Small‐Scale Convection From the PI‐LAB Experiment

open access: yesGeochemistry, 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
doaj   +1 more source

Tectonic Inheritance During Plate Boundary Evolution in Southern California Constrained From Seismic Anisotropy

open access: yesGeochemistry, Geophysics, Geosystems, 2021
The style of convective force transmission to plates and strain‐localization within and underneath plate boundaries remain debated. To address some of the related issues, we analyze a range of deformation indicators in southern California from the ...
Vera Schulte‐Pelkum   +3 more
doaj   +1 more source

Sub‐Lithospheric Small‐Scale Convection Tomographically Imaged Beneath the Pacific Plate

open access: yesGeophysical Research Letters, 2022
Small‐scale convection beneath the oceanic plates has been invoked to explain off‐axis nonplume volcanism, departure from simple seafloor depth‐age relationships, and intraplate gravity lineations.
Zachary C. Eilon   +4 more
doaj   +1 more source

Rifts, orogens, cratons, and global tectonics: Introduction

open access: yesГеодинамика 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
doaj   +1 more source

The Role of Tectonic Plate Thickness and Mantle Conductance in Determining Regional Vulnerability to Extreme Space Weather Events: Possible Enhancement of Magnetic Source Fields by Secondary Induction in the Asthenosphere

open access: yesSpace 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
doaj   +1 more source

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review [PDF]

open access: yes, 2004
Mafic alkalic volcanism was widespread in the Carpathian–Pannonian region (CPR) between 11 and 0.2 Ma. It followed the Miocene continental collision of the Alcapa and Tisia blocks with the European plate, as subduction-related calc-alkaline magmatism was
Albarede   +75 more
core   +1 more source

2010年马乌莱MW8.8地震震后形变三维黏弹性数值模拟

open access: yesDizhen 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
doaj   +1 more source

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