How is terrestrial helium primarily formed deep within the Earth?

Answer

As a byproduct of radioactive decay of heavy elements like uranium and thorium.

The helium harvested on Earth originates deep underground where alpha particles emitted during the slow breakdown of heavy elements like uranium and thorium capture electrons, forming helium atoms.

How is terrestrial helium primarily formed deep within the Earth?

#Videos

The world will run out of helium, but this could fix it - YouTube

Earthsupplyheliumresourcescarcity