Earth recycles ocean floor to diamonds

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CONTEXT:

  • Australia’s Macquarie University researchers revealed salt traces trapped in many diamonds show they are formed from ancient seabeds that got recycled after being buried deep beneath Earth’s crust.
  • Researchers carried out experiments at extreme pressures and temperatures found 200 km underground.
  • At 120-180 km depth, results showed salt balance similar to that found in natural diamonds.
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