The diverse planetary ingassing/outgassing paths produced over billions of years of magmatic activity

F Gaillard, MA Bouhifd, E Füri, V Malavergne… - Space Science …, 2021 - Springer
The CHONS elements that constitute the outgassed atmosphere and exosphere have likely
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 …

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 …

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 …

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 …

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 …

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 …

Petit-spot geology reveals melts in upper-most asthenosphere dragged by lithosphere

S Machida, N Hirano, H Sumino, T Hirata… - Earth and Planetary …, 2015 - Elsevier
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 …

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 …

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 …