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Helium discovery a 'game-changer' Helium discovery a 'game-changer'
(about 1 hour later)
Scientists say they have found a large helium gas field in Tanzania. Scientists have discovered a large helium gas field in Tanzania.
With world supplies running out, the discovery is a "game-changer", say geologists at Durham and Oxford universities. With world supplies running out, the find is a "game-changer", say geologists at Durham and Oxford universities.
Helium is used in hospitals in MRI scanners as well as in spacecrafts, telescopes and radiation monitors. Helium is used in hospitals in MRI scanners as well as in spacecraft, telescopes and radiation monitors.
Until now, the precious gas has been discovered only in small quantities during oil and gas drilling.Until now, the precious gas has been discovered only in small quantities during oil and gas drilling.
Using a new exploration approach, researchers found large quantities of helium within the Tanzanian East African Rift Valley.Using a new exploration approach, researchers found large quantities of helium within the Tanzanian East African Rift Valley.
They say resources in just one part of the Rift valley are enough to fill more than a million medical MRI scanners.They say resources in just one part of the Rift valley are enough to fill more than a million medical MRI scanners.
Professor Chris Ballentine, Department of Earth Sciences, University of Oxford, said: "This is a game changer for the future security of society's helium needs and similar finds in the future may not be far away." Prof Chris Ballentine, of the Department of Earth Sciences at the University of Oxford, said: "This is a game-changer for the future security of society's helium needs and similar finds in the future may not be far away."
And colleague Dr Pete Barry added: 'We can apply this same strategy to other parts of the world with a similar geological history to find new helium resources. "And colleague Dr Pete Barry added: 'We can apply this same strategy to other parts of the world with a similar geological history to find new helium resources. "
Volcanic clue What helium is used for
The researchers say volcanic activity in the Rift releases helium buried in ancient rock, which then becomes trapped in shallower gas fields. Helium is formed by the slow and steady radioactive decay of terrestrial rock. However, global supplies are running low, with warnings that supplies cannot be guaranteed in the long term.
The amount of helium is estimated at more than 54 billion cubic feet - twice that of the world's largest supplier in the US. Prof Jon Gluyas, of the Department of Earth Sciences at Durham University, who collaborated on the project, said the price of helium had gone up 500% in the last 15 years.
Helium is the second most abundant element in the Universe. "Helium is the second most abundant element in the Universe but it's exceedingly rare on Earth," Prof Gluyas told BBC News.
It is present in all stars and on Earth is formed by the slow and steady radioactive decay of terrestrial rock. "Moreover, any helium that you do find if you're not careful, will escape, just like a party balloon it rises and rises in the atmosphere and eventually escapes the Earth's gravity altogether.
"It's used in a whole array of key instrumentation, particularly medical MRI scanning and so on, and so we have to keep finding more."
Volcanic clues
The researchers say volcanic activity in the Rift Valley releases helium buried in ancient rocks, which rises up and becomes trapped in shallower gas fields.
The amount of helium is estimated at more than 54 billion cubic feet - which could potentially meet global demand for several years.
The next step is to find the best place to drill to exploit the gas and bring it to the surface.
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