Abstract
The source of the primary magmatic magma of the Upper Pliocene-Quaternary trachybasalt-trachyandesite volcanic complex of the central part of the Lesser Caucasus is investigated in the article. The distribution of rare earth elements in the rocks of the trachybasalt-trachyandesite complex indicates that the source of the vulcanite’s was a metasomatically altered garnetbearing mantle substrate. Based on the geochemical characteristics of moderately alkaline olivine basalts, it was determined that the source of the magma is a lithospheric mantle containing metasomatized phlogopite-garnet-rutile. Keywords: Lesser Caucasus; Upper Pliocene-Quaternary volcanism; Primary magma; Lithospheric mantle hosting metasomatized phlogopite-garnetrutile.
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