WATER INCLUSIONS IN LECHATELIERITE FROM IMPACT FLUIDIZITES OF THE POPIGAI ASTROBLEME

Abstract

Endogenic fluidizites and tuffizites have been known for a long time and are rather abundant in the Earth’s crust. They are formed by emplacement of hot fluid–melt mixtures under a high excess pressure. Such rocks have not only academic significance, but also important economic implications, because deposits of ferrous, nonferrous, rare, and noble metals are often associated with them. The study of impact structures—the Popigai astrobleme, in particular — has shown that the products related to the emplacement of fluidized, high-mobile material can appear in the course of both endogenic and impact processes.