Results 1 to 10 of about 4,659 (167)

Europium in plagioclase-hosted melt inclusions reveals mantle melting modulates oxygen fugacity [PDF]

open access: yesNature Communications
To 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

Petrogenesis and Sr-Nd isotope Geochemistry of Neogene Igneous Rocks in the Goloumak Area, South of Kerman, Iran [PDF]

open access: yesJournal 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

open access: yesVolcanica, 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
doaj   +1 more source

The Impact of Climate‐Driven Lake Level Changes on Mantle Melting in Continental Rifts

open access: yesGeophysical 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
doaj   +1 more source

Petrographic and geochemical characteristics of olivine basalts from east of Nehbandan and Chahchocho (Sistan suture zone, eastern Iran) [PDF]

open access: yesپترولوژی, 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

Extreme Heterogeneity in Mid‐Ocean Ridge Mantle Revealed in Lavas From the 8°20′N Near‐Axis Seamount Chain

open access: yesGeochemistry, 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

Oceanic Slab Melting and Mantle Metasomatism [PDF]

open access: yesScience 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

Highly siderophile element and osmium isotope systematics of basaltic volcanics: A different approach to petrological processes

open access: yesBulletin 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

open access: yesNature 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

Investigation of Petrological Characteristics of The Upper Mantle in Hadji-Abad Ophiolitic Complex (South of Iran): Based on Mineral Chemistry [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2021
The mantle peridotites of the Hadji-Abad ultramafic complex in Hormozgan province, show some petrological evolutions of the upper mantle of southern Iran. The complex includes harzburgite, lherzolite, dunite and chromitite.
Mojtaba SoltaniNezhad   +4 more
doaj   +1 more source

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