The discovery may help replace the now closed Argyle mine as source of the world’s biggest and high-quality pink diamonds.
, is that it shows pink diamonds found at surface level turn this colour by being subjected to forces equal to those of colliding tectonic plates.hundreds of millions of years ago was the missing component of the equation. For a diamond to turn out pink, something more powerful than mere mantle conditions must contort its sturdy crystal structure, altering how it absorbs and transmits light, the scientists say.
Lead researcher Dr Hugo Olierook, from Curtin’s John de Laeter Centre, said the “stretching” of landmasses created gaps in the Earth’s crust through which diamond-carrying magma could rise to the surface. Argyle sits, in fact, within an ancient continental suture, where two plates would have collided to form part of the. “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,” he noted.
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