Diamond geology - Exploration geologists have made a number of important discoveries that have changed their view on how diamonds form and how they arrive on the surface. The big discovery that changed how they view things was the determination that diamonds are far older than the host rock kimberlites and lamprolite rocks they are found in. Scientists have determined the pressure and temperature conditions needed to form diamond these are pressures higher than 590,000 PSI at temperatures of 1800 degrees Fahrenheit.
The crust of our earth averages about 25 miles thick, but even the pressures at this depth are still not enough to form diamond. It actually takes something more than 75 miles of rock on top to create that pressure needed for diamond formation. As a result, only at those places where the crust has been thickened by the forces of tectonic plate collisions.
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11 июл 2024
