Diamond potential of the marginal parts of ancient platforms and associated folded areas

Abstract

In recent years, more and more information has become available on the subsidence of the oceanic lithosphere into the horizons of the transition zone and the lower mantle of the Earth. Highly metamorphosed rocks are often found in ophiolite complexes of folded areas, which, according to some researchers, can also have significant diamond content. A comprehensive study of all possible sources of information about the formation conditions and evolution of contrasting crustal protoliths opens up new prospects for determining such complex geological processes. These studies are also important in the context of identification of new mineralogical and geochemical markers of diamond-forming processes and, on their basis, determination of the possibility of their practical use in improving methods for predicting, prospecting and evaluating diamond deposits. The current issue of our Journal is devoted to these relevant problems.