Results 31 to 40 of about 12,547 (243)

Multiscale modeling of upper mantle plasticity: From single-crystal rheology to multiphase aggregate deformation [PDF]

, 2014
We report a first application of an improved second-order (SO) viscoplastic self-consistent model for multiphase aggregates, applied to an olivine + diopside aggregate as analogue for a dry upper mantle peridotite deformed at 10 15 s 1 shear strain rate ...
CORDIER, Patrick, CASTELNAU, Olivier, RATERON, Paul, MERKEL, Sébastien, RATERRON, Paul, BOLLINGER, Caroline, DETREZ, Fabrice   +6 more
core   +1 more source

Geochemistry and tectonic development of Cenozoic magmatism in the Carpathian–Pannonian region [PDF]

, 2011
This review considers the magmatic processes in the Carpathian–Pannonian Region (CPR) from Early Miocene to Recent times, as well as the contemporaneous magmatism at its southern boundary in the Dinaride and Balkans regions.
Hilary Downes, Ioan Seghedi, Seghedi, I., Downes, Hilary   +3 more
core   +1 more source

Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton

Scientific Reports, 2021
The North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce.
Xingpeng Dong, Dinghui Yang, Fenglin Niu, Shaolin Liu, Ping Tong   +4 more
doaj   +1 more source

Making Cratonic Lithospheric Mantle [PDF]

Journal of Geophysical Research: Solid Earth, 2018
AbstractThe origin of cratonic lithospheric mantle has been attributed to either high‐pressure (5–7 GPa) melting in hot mantle plumes or low‐pressure (<5 GPa) melting in mid‐ocean ridges or suprasubduction zones. To resolve this long‐standing debate, it is necessary to confirm under what depths the incipient cratonic mantle melted.
Bin Su, Yi Chen
openaire   +1 more source

The development of magmatism along the Cameroon Volcanic Line: evidence from seismicity and seismic anisotropy [PDF]

, 2014
The Cameroon Volcanic Line (CVL) straddles the continent-ocean boundary in West Africa but exhibits no clear age progression. This renders it difficult to explain by traditional plume/plate motion hypotheses; thus, there remains no consensus on the ...
R. J. Gallacher, J. Keane, Keir, D, I. D. Bastow, Chambers, EL, Keane, J, Chambers, E.L., E. L. Chambers, De Plaen, RSM, Keane, J., Keir, D., D. Keir, Bastow, ID, R. S. M. De Plaen, De Plaen, R.S.M., Gallacher, RJ, Keir, Derek Boswell, Bastow, I.D., Gallacher, R.J.   +18 more
core   +1 more source

Plume-Induced Subduction Initiation: Revisiting Models and Observations

Frontiers in Earth Science, 2021
Subduction initiation induced by a hot and buoyant mantle plume head is unique among proposed subduction initiation mechanisms because it does not require pre-existing weak zones or other forces for lithospheric collapse.
Marzieh Baes, Marzieh Baes, Robert J. Stern, Scott Whattam, Taras V. Gerya, Stephan V. Sobolev, Stephan V. Sobolev   +6 more
doaj   +1 more source

African cratonic lithosphere carved by mantle plumes [PDF]

Nature Communications, 2020
AbstractHow cratons, the ancient cores of continents, evolved since their formation over 2.5 Ga ago is debated. Seismic tomography can map the thick lithosphere of cratons, but its resolution is low in sparsely sampled continents. Here we show, using waveform tomography with a large, newly available dataset, that cratonic lithosphere beneath Africa is ...
Nicolas Luca Celli, Sergei Lebedev, Andrew J. Schaeffer, Carmen Gaina   +3 more
openaire   +4 more sources

Lithospheric deformation and mantle dynamics beneath the eastern North American Margin from frequency-dependent shear wave splitting analyses

, 2023
Lynner, ColtonConstraints on the relative contributions of lithospheric and asthenospheric seismic anisotropy along the eastern passive margin of North America are necessary to further our understanding of past tectonics and current mantle dynamics ...
Shrestha, Rajani
core   +1 more source

Mantle Anisotropy in NW Namibia From XKS Splitting: Effects of Asthenospheric Flow, Lithospheric Structures, and Magmatic Underplating

Geophysical Research Letters, 2023
The presence of the Etendeka flood basalts in northwestern Namibia is taken as evidence for the activity of the Tristan da Cunha mantle plume during the continental breakup between Africa and South America.
Abolfazl Komeazi, Ayoub Kaviani, Georg Rümpker   +2 more
doaj   +1 more source

Metasomatism in oceanic and continental lithospheric mantle: introduction [PDF]

Geological Society, London, Special Publications, 2007
s CD. BODINIER, J.-L., MENZIES, M. A., SHIMIZU, N., FREY, F. A. & MCPHERSON, E. 2004. Silicate, hydrous and carbonate metasomatism at Lherz, France: contemporaneous derivatives of silicate melt–harzburgite reaction. Journal of Petrology, 45, 299–320. BONADIMAN, C., BECCALUVA, L., COLTORTI, M. & SIENA, F. 2005.
COLTORTI, Massimo, Gregoire M.
openaire   +2 more sources