In Photos: Massive Underground Helium Reserve Found in Tanzania
By Tom Metcalfe, Live Science Contributor | October 6, 2017 11:33am ET
Underground pockets of helium gas discovered in the Rift Valley region of Tanzania are now thought to be around twice as large as initially reported, according to new research by scientists from the University of Oxford, in the United Kingdom.
When the discovery was announced last year, independent resource assessors estimated that the underground gas deposits in Tanzania contained around 54 billion cubic feet (1.5 billion cubic meters) of helium, mixed with mainly nitrogen gas. But, a reanalysis of the helium concentrations in the gas deposits indicate they may hold more than 98.6 billion cubic feet (2.8 billion cubic meters) of helium gas.
https://www.livescience.com/60607-helium-reserve-discovered-in-tanzania-photos.html