An international team of researchers has discovered groundwater that is more than a billion years old deep below Earth’s surface from a gold and uranium producing mine in Moab Khotsong, South Africa. In the groundwater samples, the researchers found large amounts of radiogenic helium, neon, argon and xenon, and an unprecedented discovery of an isotope of krypton. South Africa is a key area for helium exploration and will be the world's newest producer of helium when Renergen starts producing later this year.
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