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Highest terrestrial 3He/4He credibly from the core
The observation that many lavas associated with mantle plumes have higher 3 He/ 4 He ratios than the upper convecting mantle underpins geophysical,...
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Primary N2–He gas field formation in intracratonic sedimentary basins
Helium, nitrogen and hydrogen are continually generated within the deep continental crust
1 –9 . Conceptual degassing models for quiescent continental...
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Estimation of the depth of origin of fluids using noble gases in the surface sediments of submarine mud volcanoes off Tanegashima Island
The helium isotope ratio ( 3 He/ 4 He), concentration ratio of neon-20 to helium-4 ( 20 Ne/ 4 He), argon (Ar), krypton (Kr), and xenon (Xe) concentrations...
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Monitoring of magmatic–hydrothermal system by noble gas and carbon isotopic compositions of fumarolic gases
We repeatedly measured isotopic compositions of noble gases and CO 2 in volcanic gases sampled at six fumaroles around the Kusatsu-Shirane volcano...
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Noble gas isotopes reveal degassing-derived eruptions at Deception Island (Antarctica): implications for the current high levels of volcanic activity
Deception Island is one of the most active volcanoes in Antarctica with more than twenty explosive eruptions in the past two centuries. Any future...
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High temperature methane emissions from Large Igneous Provinces as contributors to late Permian mass extinctions
Methane (CH 4 ) emissions induced by Large Igneous Provinces have the potential to contribute to global environmental changes that triggered mass...
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Feasibility of 129I groundwater dating calibrated by both 81Kr and 4He for the assessment of deep geological repositories in Japan
Iodine-129, which is a promising tracer for dating old groundwater, has been used as a tracer for deep upwelling groundwater. The nuclide is expected...
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The deep origin of ground fissures in the Kenya Rift Valley
Intense volcanic and geothermal activities characterize the Great Rift Valley of East Africa. Ground fissure disasters of the Great Rift Valley have...
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Volcanic soil gas 4He/CO2 ratio: a useful geochemical tool for real-time eruption forecasting
At many dormant volcanoes, magmatic gases are not channeled through preferential degassing routes as fumaroles and only percolate through the flanks...
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Excitonic insulator to superconductor phase transition in ultra-compressed helium
Helium, the second most abundant element in the universe, exhibits an extremely large electronic band gap of about 20 eV at ambient pressures. While...
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Observation of a correlated free four-neutron system
A long-standing question in nuclear physics is whether chargeless nuclear systems can exist. To our knowledge, only neutron stars represent near-pure...
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86Kr excess and other noble gases identify a billion-year-old radiogenically-enriched groundwater system
Deep within the Precambrian basement rocks of the Earth, groundwaters can sustain subsurface microbial communities, and are targets of investigation...
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Pleistocene drivers of Northwest African hydroclimate and vegetation
Savanna ecosystems were the landscapes for human evolution and are vital to modern Sub-Saharan African food security, yet the fundamental drivers of...
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Experimental realization of one dimensional helium
As the spatial dimension is lowered, locally stabilizing interactions are reduced, leading to the emergence of strongly fluctuating phases of matter...
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Primitive noble gases sampled from ocean island basalts cannot be from the Earth’s core
Noble gas isotopes in plumes require a source of primitive volatiles largely isolated in the Earth for 4.5 Gyrs. Among the proposed reservoirs, the...
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Creating two-dimensional solid helium via diamond lattice confinement
The universe abounds with solid helium in polymorphic forms. Therefore, exploring the allotropes of helium remains vital to our understanding of...
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A geospatial platform for the tectonic interpretation of low-temperature thermochronology Big Data
Low-temperature thermochronology is a powerful tool for constraining the thermal evolution of rocks and minerals in relation to a breadth of...
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Gas permeation through graphdiyne-based nanoporous membranes
Nanoporous membranes based on two dimensional materials are predicted to provide highly selective gas transport in combination with extreme...
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The Qixiangzhan eruption, Changbaishan-Tianchi volcano, China/DPRK: new age constraints and their implications
Zircon double dating (ZDD) of comendite lava reveals an eruption age of 7.0 ± 0.9 ka for the Qixiangzhan eruption (QXZ), Changbaishan-Tianchi...
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Quantum bath suppression in a superconducting circuit by immersion cooling
Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Multiple experiments to-date have shown that...
