Results 41 to 50 of about 196,173 (215)

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

open access: yesGeological 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

Tectonic significance and redox state of Paleoproterozoic eclogite and pyroxenite components in the Slave cratonic mantle lithosphere, Voyageur kimberlite, Arctic Canada

open access: yes, 2017
Mantle-derived eclogite and pyroxenite xenoliths from the Jurassic Voyageur kimberlite on the northern Slave craton in Arctic Canada were studied for garnet and clinopyroxene major and trace element compositions, clinopyroxene Pb and garnet O isotopic ...
K. Smart   +5 more
semanticscholar   +1 more source

Ambient noise surface wave tomography of marginal seas in east Asia

open access: yesEarth 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]

open access: yesGeochemistry, 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.   +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

open access: yesGeological 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

Mapping global kimberlite potential from reconstructions of mantle flow over the past billion years.

open access: yesPLoS ONE, 2022
Kimberlites are the primary source of economic grade diamonds. Their geologically rapid eruptions preferentially occur near or through thick and ancient continental lithosphere.
Anton Grabreck   +2 more
doaj   +1 more source

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

open access: yesGeological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos   +6 more
wiley   +1 more source

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

open access: yesGeophysical 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

Water and Oxygen Fugacity in the Lithospheric Mantle Wedge beneath the Northern Canadian Cordillera (Alligator Lake)

open access: yesGeochemistry, Geophysics, Geosystems, 2018
Assessing water contents of subduction zone mantle peridotites can gain insight into the compositions of slab‐derived fluids/melts and the active margin water cycle.
McKensie L. Kilgore   +3 more
doaj   +1 more source

Distribution and Processing of Highly Siderophile Elements in Cratonic Mantle Lithosphere

open access: yes, 2016
Cratonic lithospheric mantle is composed of predominantly refractory materials that formed at higher mantle potential temperatures ( T P) than recorded in non-cratonic peridotites.
S. Aulbach, J. Mungall, D. G. Pearson
semanticscholar   +1 more source

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