An explanation has been found for the origin of diamond deposits. Free Technical Library News

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Found an explanation for the origin of diamond deposits

12.05.2023

Scientists from the University of Wollongong (Australia) have found that the rise of diamonds from the bowels of the Earth to the surface occurs as a result of kimberlite eruptions due to giant heat columns emanating from a depth of 2900 kilometers near the planet's core.

Kimberlite eruptions, leaving behind a diamond deposit in the form of a pipe in the earth's crust, have occurred hundreds of times over the past 200 million years. Signs of eruptions have been found around the world, including 788 in Canada, 158 in South Africa, 71 in Angola and 70 in Brazil. In the 1980s, it was shown that kimberlite eruptions could be associated with small mantle plumes between the mantle and the core.

The researchers used supercomputers to build XNUMXD geodynamic models of global mantle convection over a billion years, including that associated with the subduction zone where the Pacific Plate is subducting under the continental South American Plate.

It turned out that the very deep layers of the Earth are connected to the surface with the help of wide mantle upwellings, i.e. ascending hot flows that explain most of the kimberlite eruptions over the past two hundred years.

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