Abstract

The following topics are discussed: 1) position of, alkalic intrusions in various structural and facies zones of East Tuva and its effect on the composition and form of the intrusions; 2) the close genetic relationship between the alkalic massifs and deep faults, including those approaching that rank. It is demonstrated that fault tectonics and its associated alkalic volcanism control the areal distribution, dimensions, form and structural complexity of the alkalic massifs; also the distribution of autometasomatism, namely albitization, associated with which is the rare-metal mineralization of East Tuva alkalic complex. — Author.

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