Results 51 to 60 of about 22,070 (265)

The lithosphere-asthenosphere: Italy and surroundings

Episodes, 2003
Abstract The velocity-depth distribution of the lithosphere-asthenosphere in the Italian region and surroundings is imaged, with a lateral resolution of about 100 km, by surface wave velocity tomography and non-linear inversion. Maps of the Moho depth, of the thickness of the lithosphere and of the shear-wave velocities, down to depths of 200 km and ...
PANZA, GIULIANO, PONTEVIVO A., CHIMERA G., RAYKOVA R., AOUDIA A.   +4 more
openaire   +3 more sources

Toward a boot strap hypothesis of plate tectonics: Feedbacks between plates, the asthenosphere, and the wavelength of mantle convection

Physics of the Earth and Planetary Interiors, 2019
The solid Earth system is characterized by plate tectonics, a low viscosity zone beneath plates (the asthenosphere), and long wavelength flow in the convecting mantle.
A. Lenardic, M. Weller, T. Höink, J. Seales   +3 more
semanticscholar   +1 more source

Continental Thermal Blanketing Explains the Compositional Dichotomy of the Diffuse Basaltic Province Across Central‐Eastern Asia

Geophysical Research Letters, 2023
A diffuse magmatic province covering central‐eastern Asia continent displays a compositional transition at 120–100 Ma and probably reflects melting initiation in isotopically enriched lithospheric mantle, followed by melting of the asthenosphere. However,
Hong‐Kun Dai, Jian‐Ping Zheng, Qing Xiong, William L. Griffin, Suzanne Y. O’Reilly   +4 more
doaj   +1 more source

Core-mantle boundary deformations and J2 variations resulting from the 2004 Sumatra earthquake

, 2007
The deformation at the core-mantle boundary produced by the 2004 Sumatra earthquake is investigated by means of a semi-analytic theoretical model of global coseismic and postseismic deformation, predicting a millimetric coseismic perturbation over a ...
A. Piersanti, Alfonsi, Banerjee, Bloxham, Boschi, Boschi, Chao, Chao, Cheng, Cox, D. Melini, Dumberry, Dumberry, Dziewonski, Dziewonski, F. Florindo, Florindo, Florindo, Gross, Lambeck, Marquart, Mitrovica, Nostro, P. De Michelis, Park, Piersanti, Piersanti, Pollitz, Sabadini, Tsai, V. Cannelli   +30 more
core   +1 more source

Convergent flow in a two-layer system and mountain building [PDF]

, 2010
With the purpose of modelling the process of mountain building, we investigate the evolution of the ridge produced by the convergent motion of a system consisting of two layers of liquids that differ in density and viscosity to simulate the crust and the
Gratton, Julio, Perazzo, Carlos Alberto
core   +4 more sources

Asthenosphere Flow Modulated by Megathrust Earthquake Cycles

Geophysical Research Letters, 2018
Subduction megathrusts develop the largest earthquakes, often close to large population centers. Understanding the dynamics of deformation at subduction zones is therefore important to better assess seismic hazards.
S. Barbot
semanticscholar   +1 more source

Upper mantle anisotropy from shear wave splitting of teleseismic earthquakes in the Kumaun-Garhwal and adjoining area of NW Himalaya

Journal of Asian Earth Sciences: X, 2021
Teleseismic earthquakes data recorded by 8 broadband digital seismic stations deployed in the Kumaun-Garhwal and adjoining area of NW Himalaya are analyzed to investigate the seismic anisotropy in the upper mantle. Shear-wave splitting parameters (ɸ and ∂
Narendra Kumar, Kailash Kumar Gautam, Minakshi Mishra, Sushil Kumar, Parveen Kumar   +4 more
doaj   +1 more source

Multiphase Tectonic Process With Slab Dynamics in the Northern East China Sea Shelf Basin

Geological Journal, EarlyView.
Megasequence 1 characterised by Palaeocene extension and differential subsidence driven by the rollback of the subducting Izanagi Plate. Megasequence 2 records a kinematic reorganisation of the East Asian margin, transition from a rifting to a compressional regime.
Juhwan Woo, Won‐Ki Kim, Chul Woo Rhee, Seungyeol Lee   +3 more
wiley   +1 more source

Characterizing the Complexity of Subduction Zone Flow With an Ensemble of Multiscale Global Convection Models

Geochemistry, Geophysics, Geosystems
Subduction zones are fundamental features of Earth's mantle convection and plate tectonics, but mantle flow and pressure around slabs are poorly understood because of the lack of direct observational constraints on subsurface flow.
Samuel L. Goldberg, Adam F. Holt
doaj   +1 more source

In Situ Characterization of the Lithosphere‐Asthenosphere System beneath NW Pacific Ocean Via Broadband Dispersion Survey With Two OBS Arrays

Geochemistry, Geophysics, Geosystems, 2018
We conducted broadband dispersion survey by deploying two arrays of broadband ocean bottom seismometers in the northwestern Pacific Ocean at seafloor ages of 130 and 140 Ma.
Akiko Takeo, Hitoshi Kawakatsu, Takehi Isse, Kiwamu Nishida, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Hisashi Utada   +7 more
doaj   +1 more source