Researchers might have discovered a brand new clue that would assist determine websites able to yielding huge quantities of beneficial pink diamonds.
It is thought that there must be carbon deep within the Earth for the valuable stones to type, and for these to show pink they have to be subjected to forces from colliding tectonic plates – giant slabs of rock that divide Earth’s crust.
The new research discovered a 3rd ingredient wanted for the presence of pink diamonds at floor degree, which is continents that have been stretched throughout continental break-up tons of of hundreds of thousands of years in the past.
According to scientists, this lacking third key ingredient – wanted to deliver the valuable stones to the Earth’s floor the place they are often mined – may significantly assist in the worldwide hunt for brand spanking new deposits.
Researchers at Curtin University in Australia used laser beams smaller than the width of a human hair to look at diamond-rich rocks from Western Australia’s Argyle volcanoes.
They discovered that Argyle was 1.3 billion years previous – 100 million years older than beforehand thought, which means it could probably have shaped on account of an historical supercontinent breaking up.
Lead researcher Dr Hugo Olierook, from Curtin’s John de Laeter Centre, stated the stretching of land plenty created gaps within the Earth’s crust by way of which diamond-carrying magma may rise to the floor.
Dr Olierook added: “Argyle is located at the point where the Kimberley region and the rest of northern Australia smashed together many years prior, and that sort of collision creates a damaged area or ‘scar’ in the land that will never fully heal.
“While the continent that would become Australia didn’t break up, the area where Argyle is situated was stretched, including along the scar, which created gaps in the Earth’s crust for magma to shoot up through to the surface, bringing with it pink diamonds.
“As long as these three ingredients are present – deep carbon, continental collision and then stretching – then we think it will be possible to find the ‘next Argyle’, which was once the world’s largest source of natural diamonds.”
However, even with the three substances, discovering one other trove of pink diamonds is not going to be with out its challenges.
Dr Olierook stated: “Most diamond deposits have been found in the middle of ancient continents because their host volcanoes tend to be exposed at the surface for explorers to find.
“Argyle is at the suture of two of these ancient continents, and these edges are often covered by sand and soil, leaving the possibility that similar pink diamond-bearing volcanoes still sit undiscovered, including in Australia.”
Co-author and principal geologist Murray Rayner, from mining group Rio Tinto who equipped the rock samples, stated the Argyle volcano has produced greater than 90% of the world’s pink diamonds, making it an unparalleled supply of those uncommon and coveted gems.
The analysis is revealed within the Nature Communications journal.