Diamond-inclusion system recording old deep lithosphere conditions at Udachnaya (Siberia).

ABSTRACT: Diamonds and their inclusions are unique fragments of deep Earth, which provide rare samples from inaccessible portions of our planet. Inclusion-free diamonds cannot provide information on depth of formation, which could be crucial to understand how the carbon cycle operated in the past. Inclusions in diamonds, which remain uncorrupted over geological times, may instead provide direct records of deep Earth's evolution. Here, we applied elastic geothermobarometry to a diamond-magnesiochromite (mchr) host-inclusion pair from the Udachnaya kimberlite (Siberia, Russia), one of the most important sources of natural diamonds. By combining X-ray diffraction and Fourier-transform infrared spectroscopy data with a new elastic model, we obtained entrapment conditions, P_trap = 6.5(2) GPa a

SUBMITTER: Nestola F 

PROVIDER: S-EPMC6715805 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature