For decades, noble gases like helium have been considered chemically ... Until now, researchers believed that helium was stored in the mantle, trapped in ancient rock formations.

As Zhang explained, the Cook-Austral Island rocks were delivered from deep in the planet's mantle to the Earth's surface through volcanic eruptions. The signature noble gases in the rocks showed ...

Like the other noble gases, helium doesn’t gain or lose electrons ... is more likely to reside in Earth’s core or higher in its mantle. “The partitioning of helium between magma, silicate ...

Noble gases including helium are normally chemically inert ... which originally derives from hot plumes coming from deep within Earth’s mantle.” The mantle is the region between Earth’s core and crust ...