The Kinki region is non-volcanic, yet the measured 3 He/ 4 He ratios in springs as Arima reach values of 7.4Ra with 90% of the helium being mantle-derived 34. There are at least two possible ...
Light isotopes of hydrogen and helium formed minutes after the Big Bang. The study of one of these primordial isotopes, helium-3, has now been proposed as a useful strategy for constraining the ...
Researchers discovered an increase in a helium isotope during a 10-year period before the 2014 Mount Ontake eruption in central Japan. The finding suggests that this helium isotope anomaly is related ...
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