There may be even more quadrillion tons of diamonds on Earth.
According to a new study by the Massachusetts Institute of Technology and other universities, there may be more quadrillion tons of diamonds deep in the Earth. But according to scientists, precious minerals are at a depth of 150 km, which is deeper than any expedition has ever reached.
How was this discovered?
The study shows that diamonds can be scattered inside the platform troughs - the oldest and most stationary areas of rock that lie below the center of most continental tectonic plates. Such depressions can go down to a depth of 300 km or more. According to calculations, platform trenches may consist of diamonds by 1-2%, and taking into account the volume of platform trenches on Earth, the number of diamonds may exceed a quadrillion tons.
Thus, the researchers conclude, diamonds are a very common mineral on a geological scale.But the bad news is that diamonds lie too deep - at a depth of about 150 km and even more. This is much deeper than all the previous expeditions.
The assumption of the existence of a large number of diamonds in the earth's crust is made on the basis of a study of the seismic data anomaly.
Seismic receivers around the world collect sound waves and can use this data to build a model of the Earth. Sound waves travel at different speeds, depending on temperature, density, and rock composition. For some time, scientists could not explain the curious anomaly: sound waves are greatly accelerated when passing the hollows of ancient platforms. A team of researchers sought to determine the composition of these cavities, and studied in the virtual model the speed with which sound waves passed through each rock. It was found that only one type of rock provides such a speed of sound waves - diamonds combined with peridotite (the predominant rock of the upper mantle of the Earth) and a small amount of eclogite (representing the underwater oceanic crust).