The diverse planetary ingassing/outgassing paths produced over billions of years of magmatic activity
The CHONS elements that constitute the outgassed atmosphere and exosphere have likely
been delivered by chondritic materials to the Earth during planetary accretion and …
been delivered by chondritic materials to the Earth during planetary accretion and …
The mantle structure below petit-spot volcanoes
N Hirano, S Machida - Communications Earth & Environment, 2022 - nature.com
Petit-spot volcanoes provide a unique opportunity to directly examine the structure and
geochemical composition of the lithospheric and asthenospheric mantle beneath the …
geochemical composition of the lithospheric and asthenospheric mantle beneath the …
Intraplate volcanism originating from upwelling hydrous mantle transition zone
J Yang, M Faccenda - Nature, 2020 - nature.com
Most magmatism occurring on Earth is conventionally attributed to passive mantle upwelling
at mid-ocean ridges, to slab devolatilization at subduction zones, or to mantle plumes …
at mid-ocean ridges, to slab devolatilization at subduction zones, or to mantle plumes …
Comparative deep Earth volatile cycles: The case for C recycling from exosphere/mantle fractionation of major (H2O, C, N) volatiles and from H2O/Ce, CO2/Ba, and …
MM Hirschmann - Earth and Planetary Science Letters, 2018 - Elsevier
Crucial monitors of operation of deep Earth volatile cycles are the accumulated volatile
masses in the exosphere, particularly when these are compared to outgassing fluxes and to …
masses in the exosphere, particularly when these are compared to outgassing fluxes and to …
Experimental determination of C, F, and H partitioning between mantle minerals and carbonated basalt, CO2/Ba and CO2/Nb systematics of partial melting, and the …
A Rosenthal, EH Hauri, MM Hirschmann - Earth and Planetary Science …, 2015 - Elsevier
To determine partitioning of C between upper mantle silicate minerals and basaltic melts, we
executed 26 experiments between 0.8 and 3 GPa and 1250–1500° C which yielded 37 …
executed 26 experiments between 0.8 and 3 GPa and 1250–1500° C which yielded 37 …
The behavior and concentration of CO2 in the suboceanic mantle: Inferences from undegassed ocean ridge and ocean island basalts
PJ Michael, DW Graham - Lithos, 2015 - Elsevier
In order to better determine the behavior of CO 2 relative to incompatible elements, and
improve the accuracy of mantle CO 2 concentration and flux estimates, we determined CO 2 …
improve the accuracy of mantle CO 2 concentration and flux estimates, we determined CO 2 …
Petit-spot as definitive evidence for partial melting in the asthenosphere caused by CO2
S Machida, T Kogiso, N Hirano - Nature Communications, 2017 - nature.com
The deep carbon cycle plays an important role on the chemical differentiation and physical
properties of the Earth's mantle. Especially in the asthenosphere, seismic low-velocity and …
properties of the Earth's mantle. Especially in the asthenosphere, seismic low-velocity and …
Petit-spot geology reveals melts in upper-most asthenosphere dragged by lithosphere
Petit-spot volcanism is a phenomenon ubiquitous on Earth. It originates from melt in the
upper-most mantle asthenosphere, occurring where the plate flexes and fractures before …
upper-most mantle asthenosphere, occurring where the plate flexes and fractures before …
Rare earth elements and yttrium (REY) variability with water depth in hydrogenetic ferromanganese crusts
K Azami, N Hirano, S Machida, K Yasukawa, Y Kato - Chemical Geology, 2018 - Elsevier
The origins of ferromanganese (Fe–Mn) crusts that form in seawater and elemental
partitioning into these crusts have previously been studied using samples from water depths …
partitioning into these crusts have previously been studied using samples from water depths …
Hydrothermal ferromanganese oxides around a petit-spot volcano on old and cold oceanic crust
K Azami, S Machida, N Hirano, K Nakamura… - … Earth & Environment, 2023 - nature.com
Areas of old and cold oceanic plate lack conventional volcanism and have been assumed to
be devoid of submarine hydrothermal activity. However, petit-spot volcanoes are common in …
be devoid of submarine hydrothermal activity. However, petit-spot volcanoes are common in …