Results 1 to 10 of about 5,067 (159)
Europium in plagioclase-hosted melt inclusions reveals mantle melting modulates oxygen fugacity [PDF]
Nature CommunicationsTo gain insights into the composition and heterogeneity of Earth’s interior, the partial pressure of oxygen (oxygen fugacity, or fO2) in igneous rocks is characterized. A surprising observation is that relative to reference buffers, fO2s of mantle melts (
Nicholas Dygert +2 more
doaj +2 more sources
Geochemistry, Geophysics, Geosystems, 2014 A numerical mass balance calculation model for the adiabatic melting of a dry to hydrous peridotite has been programmed in order to simulate the trace element compositions of basalts from mid‐ocean ridges, back‐arc basins, ocean islands, and large ...
Jun-Ichi Kimura
exaly +2 more sources
Deep mantle anomalies block early Earth melting, challenging a primordial origin [PDF]
Scientific ReportsEarth’s deep mantle hosts enigmatic structures known as Large Low Velocity Provinces (LLVPs), which sit atop the core–mantle boundary and influence mantle dynamics and plume generation.
Arnab Roy +2 more
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Modern arc-like water content in the source of 3.1-billion-year-old volcanic rocks [PDF]
Nature CommunicationsWhether Archean arc-like volcanism reflects subduction remains debated. We present high-resolution geochemical data from a well-preserved 3.13-3.10 Ga arc-like volcanic succession in Australia’s Pilbara Craton, a rare Archean analog of modern arc ...
Eric D. Vandenburg +6 more
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A universal concept for melting in mantle upwellings. [PDF]
NatureDeep mantle melting marks the onset of Earth differentiation1, yet a unifying framework for how buoyancy-driven mantle upwellings initiate melting and how such incipient melts evolve within the asthenosphere has remained elusive. Here we show that the first melts generated in any solid-state mantle upwelling are kimberlitic CO₂-rich silicate melts that
Schmidt MW, Paneva N, Giuliani A.
europepmc +4 more sources
Partially melted low velocity zones reveal an active upper mantle beneath Elysium Planitia, Mars [PDF]
Nature CommunicationsThe current state of Mars’s interior is fundamental to understanding its thermal evolution, volcanic history, and potential habitability. While global-scale magmatism has declined since the Amazonian epoch, recent volcanism and concentrated seismicity in
Mingwei Dai +5 more
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Petrogenesis and Sr-Nd isotope Geochemistry of Neogene Igneous Rocks in the Goloumak Area, South of Kerman, Iran [PDF]
Journal of Sciences, Islamic Republic of Iran, 2023 The study area is near Goloumak village, 30 km south of Kerman. These rock units consist of acidic rhyolite and dacite, as well as intermediate andesite, basalt, and trachy-andesite.
Farzaneh Arzhangnegad +3 more
doaj +1 more source
pyMelt: An extensible Python engine for mantle melting calculations
Volcanica, 2022 Modelling the melting of Earth’s mantle is crucial for understanding the distribution of volcanic activity on Earth and for testing models of mantle convection and mantle lithological heterogeneity.
Simon Matthews +2 more
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The Impact of Climate‐Driven Lake Level Changes on Mantle Melting in Continental Rifts
Geophysical Research Letters, 2023 Climate cycles fundamentally control surface processes that affect the distribution of water and sediment, and their associated loads, across the Earth's surface.
Liang Xue +4 more
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Oceanic Slab Melting and Mantle Metasomatism [PDF]
Science Progress, 2001 Modern plate tectonic brings down oceanic crust along subduction zones where it either dehydrates or melts. Those hydrous fluids or melts migrate into the overlying mantle wedge trigerring its melting which produces arc magmas and thus additional continental crust. Nowadays, melting seems to be restricted to cases of young (<50 Ma) subducted plates.
Scaillet, Bruno, Prouteau, Gaëlle
openaire +3 more sources