Deep, hot, ancient melting recorded by ultralow oxygen fugacity in peridotites
The oxygen fugacity (f O2) of convecting upper mantle recorded by ridge peridotites varies
by more than four orders of magnitude,–. Although much attention has been given to …
by more than four orders of magnitude,–. Although much attention has been given to …
Forearc peridotites from Tonga record heterogeneous oxidation of the mantle following subduction initiation
The elevated oxygen fugacity recorded by subduction-related lavas and peridotites, relative
to their mid-ocean ridge counterparts, fundamentally influences the petrogenesis of arc …
to their mid-ocean ridge counterparts, fundamentally influences the petrogenesis of arc …
Peridotites and basalts reveal broad congruence between two independent records of mantle fO2 despite local redox heterogeneity
The oxygen fugacity (f O2) of the oceanic upper mantle has fundamental implications for the
production of magmas and evolution of the Earth's interior and exterior. Mid-ocean ridge …
production of magmas and evolution of the Earth's interior and exterior. Mid-ocean ridge …
Revisiting the electron microprobe method of spinel-olivine-orthopyroxene oxybarometry applied to spinel peridotites
Natural peridotite samples containing olivine, orthopyroxene, and spinel can be used to
assess the oxygen fugacity f O 2 of the upper mantle. The calculation requires accurate and …
assess the oxygen fugacity f O 2 of the upper mantle. The calculation requires accurate and …
Oxygen fugacity at the base of the Talkeetna arc, Alaska
The origin of the more oxidized nature of arc magmas as compared to that of mid-ocean
ridge basalts (MORB) is debated, considered to be either a feature of their mantle source, or …
ridge basalts (MORB) is debated, considered to be either a feature of their mantle source, or …
Petrology and geochemistry of ophiolitic ultramafic rocks and chromitites across the Eastern Desert of Egypt: Insights into the composition and nature of a …
Large outcrops of ultramafic rocks are common in the Central Eastern Desert (CED) of Egypt
and represent residual mantle sections and cumulates of dismembered Neoproterozoic …
and represent residual mantle sections and cumulates of dismembered Neoproterozoic …
[HTML][HTML] Melt addition to mid-ocean ridge peridotites increases spinel Cr# with no significant effect on recorded oxygen fugacity
Mid-ocean ridge peridotites record significantly greater variability in major and trace
elements, isotopic compositions, and thermodynamic properties such as oxygen fugacity (f …
elements, isotopic compositions, and thermodynamic properties such as oxygen fugacity (f …
Ancient melt-depletion in fresh to strongly serpentinized Tonga trench peridotites
JMD Day, DB Brown - Journal of Petrology, 2021 - academic.oup.com
ABSTRACT Peridotites from the Tonga Trench are some of the deepest-derived and freshest
ever obtained from the seafloor. This study reports new bulk-rock major-, trace-, highly …
ever obtained from the seafloor. This study reports new bulk-rock major-, trace-, highly …
Europium in plagioclase-hosted melt inclusions reveals mantle melting modulates oxygen fugacity
To gain insights into the composition and heterogeneity of Earth's interior, the partial
pressure of oxygen (oxygen fugacity, or f O2) in igneous rocks is characterized. A surprising …
pressure of oxygen (oxygen fugacity, or f O2) in igneous rocks is characterized. A surprising …
[HTML][HTML] High temperature hydrothermal alteration and amphibole formation in Gakkel Ridge abyssal peridotites
Alteration mineral assemblages in abyssal peridotites offer insights into the temperature and
pressure conditions during hydrothermal fluid circulation in the oceanic lithosphere …
pressure conditions during hydrothermal fluid circulation in the oceanic lithosphere …