Results 31 to 40 of about 2,719 (188)

The Role of Lower Crustal Rheology in Lithospheric Delamination During Orogeny

Frontiers in Earth Science, 2021
The continental lower crust is an important composition- and strength-jump layer in the lithosphere. Laboratory studies show its strength varies greatly due to a wide variety of composition. How the lower crust rheology influences the collisional orogeny
Lin Chen
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

Do Olivine Crystallization Temperatures Faithfully Record Mantle Temperature Variability?

Geochemistry, Geophysics, Geosystems, 2021
Crystallization temperatures of primitive olivine crystals have been widely used as both a proxy for, or an intermediate step in calculating, mantle temperatures. The olivine‐spinel aluminum‐exchange thermometer has been applied to samples from mid‐ocean
Simon Matthews, Kevin Wong, Oliver Shorttle, Marie Edmonds, John Maclennan   +4 more
doaj   +1 more source

Cenozoic mountain building and topographic evolution in Western Europe: impact of billions of years of lithosphere evolution and plate kinematics

BSGF - Earth Sciences Bulletin, 2021
The architecture and tectono-magmatic evolution of the lithosphere of Europe are the result of a succession of subduction, rifting and inputs from plumes that have modified the lithospheric mantle since the Neoproterozoic (750–500 Ma).
Mouthereau Frédéric, Angrand Paul, Jourdon Anthony, Ternois Sébastien, Fillon Charlotte, Calassou Sylvain, Chevrot Sébastien, Ford Mary, Jolivet Laurent, Manatschal Gianreto, Masini Emmanuel, Thinon Isabelle, Vidal Olivier, Baudin Thierry   +13 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

Ambient noise surface wave tomography of marginal seas in east Asia

Earth and Planetary Physics, 2017
We conducted ambient noise tomography in east Asia, including the Chinese coastal provinces, Korea Peninsular, Japan, Taiwan Island, and marginal seas in between.
Qing Wang, XiaoDong Song, JianYe Ren
doaj   +1 more source

The Zagros core: Deformation of the continental lithospheric mantle [PDF]

Geochemistry, Geophysics, Geosystems, 2012
The Zagros of Iran form one of the youngest collisional orogenic belts on Earth. At shallow depths, shortening across the Zagros is accommodated by folding in the sediments, high‐angle thrust faulting in the basement and thickening of the lower crust, but how shortening is accommodated by the lithospheric mantle has been uncertain largely because the ...
Priestley, K., McKenzie, D., Barron, J., Tatar, M., Debayle, E.   +4 more
openaire   +3 more sources

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

Constraints on the Fate of Delaminated Lithosphere in the Upper and Mid‐Mantle

Geophysical Research Letters
Delamination of lower continental lithosphere is known to have occurred under different tectonic settings. However, its fate in the mantle is poorly understood.
Ya‐Nan Shi, Jason P. Morgan
doaj   +1 more source