Results 71 to 80 of about 1,147 (184)

Asthenosphere flow and plate motions [PDF]

Geophysical Journal International, 1978
Summary. A dynamical theory of flow in the asthenosphere is developed by treating it as a thin layer of Newtonian viscous fluid, pushed horizontally by the dense sinking slabs attached to some plates and by the differences in heating under continental and oceanic crust.
openaire   +1 more source

What is the lithosphere‐asthenosphere boundary?

Eos, Transactions American Geophysical Union, 2011
EarthScope Institute on the Lithosphere‐Asthenosphere Boundary; Portland, Oregon, 19–21 September 2011 The lithosphere‐asthenosphere boundary (LAB) marks a pronounced transition in the mechanical behavior of the upper mantle, separating the strong lithosphere from the weak asthenosphere beneath it.
Colleen A. Dalton, Clinton P. Conrad, Anne M. Tréhu   +2 more
openaire   +1 more source

Estimation of asthenospheric deformation law for the post glacial rebound based on the deformation mechanism map of olivine

Antarctic Record, 1998
Linear deformation laws have been applied to post glacial rebound, while many speculations based on real rock samples support non-linear rheology in the upper mantle. Essential information is required to support the assumed constitutive relation.
Atsuki Kubo
doaj   +1 more source

Azimuthal Variation in the Surface Wave Velocity of the Philippine Sea Plate

Journal of Marine Science and Engineering
A study of the azimuthal variation in the surface wave fundamental-mode phase velocity is performed for the Philippine Sea Plate (PSP). This azimuthal variation has been anisotropically inverted for the PSP to determine the isotropic and anisotropic ...
Víctor Corchete
doaj   +1 more source

A Mid‐Lithospheric Discontinuity Detected Beneath 155 Ma Western Pacific Seafloor Using Sp Receiver Functions

Geophysical Research Letters
This study probes the lithosphere‐asthenosphere system beneath 155 Ma Pacific seafloor using teleseismic S‐to‐p receiver functions at the Pacific Lithosphere Anisotropy and Thickness Experiment project ocean‐bottom‐seismometers. Within the lithosphere, a
K.‐X. Chen, D. W. Forsyth, K. M. Fischer   +2 more
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Seismic and isotopic evidence for depth-dependent mantle sources of intraplate basalts from Eastern China

Communications Earth & Environment
The origin of intraplate basalts remains controversial, despite numerous isotope and seismic studies. Here we employ thermodynamic modeling with MAGEMin to integrate the Sr-Nd-Hf isotopes of basaltic volcanics with the seismic velocities of their mantle ...
Zongpeng Yang, Tong Hou, Roman Botcharnikov, Evangelos Moulas, Stefan Weyer, Meng Wang, Stephan Buhre, Zhaochong Zhang   +7 more
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The Indian Plate subducting below the Tibet Plateau is tearing apart

Communications Earth & Environment
The first-order configuration of the Himalayan orogen is defined by northward motion of the Indian plate, whether directly underplating Tibetan crust or subducting beneath a mantle wedge.
Lin Liu, Danian Shi, Simon L. Klemperer
doaj   +1 more source

Relationships Between Upper-Plate Structure, Mantle Wedge Melting, and Fore-Arc Sliver Transport in the Nicaraguan Subduction Zone

The Seismic Record
This study images the base of the upper-plate lithosphere in the Nicaraguan subduction zone using common conversion point stacking of Sp phases and explores the relationships between deep upper-plate structure, subduction zone melting processes, and the ...
Emily Carrero Mustelier, Karen M. Fischer, Junlin Hua, Isabella Gama, Peter C. La Femina, Machel Higgins   +5 more
doaj   +1 more source

The correlation between lithosphere-asthenosphere boundary structure and plate motion velocity

地球与行星物理论评
The lithosphere-asthenosphere boundary (LAB), defined seismologically as the interface separating the high-velocity lithosphere from the low-velocity asthenosphere, records key information about the distinct physical and chemical properties of these two ...
Ziyu Yang, Ling Chen, Tao Xu, Haiqiang Lan   +3 more
doaj   +1 more source

The birth of a volcano: A nonlinear convective model for rock melting at the asthenosphere—Lithosphere boundary

Applications in Engineering Science
The investigation of the physical processes determining the melting of the lithospheric rocks is of crucial importance for understanding the volcanic dynamics and its related consequences.
Carmelo Filippo Munafò, Cataldo Godano, Francesco Oliveri   +2 more
doaj   +1 more source