Results 11 to 20 of about 338,697 (184)
Deformation-Induced Mechanical Instabilities at the Core-Mantle Boundary [PDF]
, 2007 Post-Perovskite: The Last Mantle Phase Transition Our understanding of the core-mantle boundary (CMB) region has improved significantly over the past several years due, in part, to the discovery of the post-perovskite phase.
Petford, Nick +2 more
core +10 more sources
Petrographic and geochemical characteristics of olivine basalts from east of Nehbandan and Chahchocho (Sistan suture zone, eastern Iran) [PDF]
پترولوژی, 2020 Olivine basalts from east of Nehbandan and Chahchocho regions belong to sodic alkaline and transitional magma series. Compared to alkaline olivine basalts (AOB), the transitional olivine basalts (TOB) have higher MgO, SiO2, Ni, Cr, Ba, Th, Pb, and U, and
Neda Mokhtari +2 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2021 Lavas that have erupted at near‐axis seamounts provide windows into mid‐ocean ridge mantle heterogeneity and melting systematics which are not easily observed on‐axis at fast‐spreading centers.
Molly Anderson +6 more
doaj +1 more source
Configurational entropy of basaltic melts in Earth’s mantle [PDF]
Proceedings of the National Academy of Sciences, 2020 Significance Proper inference of the seismological and chemical effects of partial melting in Earth’s upper mantle depends on physical properties of interstitial melts at elevated pressure. Silicate liquids display anomalous softening upon compression.
Sung Keun Lee +4 more
openaire +4 more sources
How will melting of ice affect volcanic hazards in the 21st century? [PDF]
, 2010 Glaciers and ice sheets on many active volcanoes are rapidly receding. There is compelling evidence that melting of ice during the last deglaciation triggered a dramatic acceleration in volcanic activity.
Tuffen, Hugh
core +4 more sources
Bulletin of the Mineral Research and Exploration, 2022 The highly siderophile element (HSE) or platinum group element (PGE) and Os isotope systematics of basaltic volcanics have recently received a significant attention because of their potential to constrain the petrological processes on magma generation ...
Bahrican Ar +4 more
doaj +1 more source
Melting and defect transitions in FeO up to pressures of Earth’s core-mantle boundary
Nature Communications, 2023 The high-pressure melting curve of FeO controls key aspects of Earth’s deep interior and the evolution of rocky planets more broadly. However, existing melting studies on wüstite were conducted across a limited pressure range and exhibit substantial ...
Vasilije V. Dobrosavljevic +8 more
doaj +1 more source
Fossilized Melts in Mantle Wedge Peridotites [PDF]
Scientific Reports, 2018 AbstractThe shallow oxidized asthenosphere may contain a small fraction of potassic silicate melts that are enriched in incompatible trace elements and volatiles. Here, to determine the chemical composition of such melt, we analysed fossilized melt inclusions, preserved as multiphase solid inclusions, from an orogenic garnet peridotite in the Bohemian ...
Naemura, Kosuke +4 more
openaire +3 more sources
Tertiary-Quaternary intra-plate magmatism in Europe and its relationship to mantle dynamics [PDF]
, 2006 Anorogenic intra-plate magmatism was widespread in Europe from early Tertiary to Recent times, extending west to east from Spain to Bulgaria, and south to north from Sicily to northern Germany. Magmatism is spatially and temporally associated with Alpine-
Wilson, M., Downes, Hilary
core +5 more sources
Channelized melt flow in downwelling mantle: Implications for 226Ra-210Pb disequilibria in arc magmas [PDF]
, 2008 We present the results of an analytical model of porous flow of viscous melt into a steadily dilating ‘‘channel’’ (defined as a cluster of smaller veins) in downwelling subarc mantle.
Koenders, M. A. +7 more
core +1 more source