Deep below the surface of our world, far beyond our feeble reach, enigmatic processes grind and roil.
Every now and then, the Earth disgorges clues to their nature: tiny chthonic diamonds encasing skerricks of rare mineral. From these tiny fragments we can glean tidbits of information about our planet's interior.
"The occurrence of ringwoodite together with the hydrous phases indicate a wet environment at this boundary,"led by mineral physicist Tingting Gu of the Gemological Institute of New York and Purdue University. Over time it makes its way back to the surface via volcanic activity. This slurp-down, spew-out cycle is known as the, separate from the water cycle active at the surface. Knowing how it works, and how much water is down there, is also important for understanding the geological activity of our planet. The presence of water can influence the explosiveness of a volcanic eruption, for example, and play a role in seismic activity.
Among the inclusions they found an assemblage of ringwoodite in contact with ferropericlase and enstatite .
France Dernières Nouvelles, France Actualités
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