We comprehensively compile and review N content in geologic materials to calculate a new
N budget for Earth. Using analyses of rocks and minerals in conjunction with N–Ar …

Minerals included in diamonds provide direct information about the petrologic and chemical
environment of diamond crystallization. They record information relating to local and …

The redox state of Earth's convecting mantle, masked by the lithospheric plates and basaltic
magmatism of plate tectonics, is a key unknown in the evolutionary history of our planet …

Perhaps the first point to address in this chapter is what role, or roles, experimental petrology
can play in understanding the formation of natural diamond. As can be seen from the other …

In recent years ophiolitic diamonds have been reported mostly from podiform chromitites.
However, the mechanism of such diamond formation remains unknown. We report in situ …

The terrestrial nitrogen budget, distribution, and evolution are governed by biological and
geological recycling. The biological cycle provides the nitrogen input for the geological …

Diamond has unique physical, thermal, electrical, and optical properties with respect to other
minerals and related synthetic compounds that make it extremely valuable from an …

The amount of nitrogen in the atmosphere, oceans, crust, and mantle have important
ramifications for Earth's biologic and geologic history. Despite this importance, the history …

We demonstrate for the first time the presence of iron carbides in placer diamonds from the
northeastern region of the Siberian craton. It was found that the inclusions are polycrystalline …

Carbon and nitrogen speciation has been studied in high-pressure experiments in the C–O–
H–N and C–O–H–N–Fe 3 C systems at 5.5 to 7.8 GPa and 1100 to 1500° C using a split …