On an example Verkhneurmiysky tin ore knot in Amur River region possibility of the mineralogical decision of a problem of an estimation rare-metal ore content of zwitters or others hydrothermalites, connected with lithionite (lithium-fluoric) granites is considered. Multiphasic formation of syngenetic rare-metal mineralizations in metasomatite is established. The estimation of tin ore occurence from Verkhneurmiysky ore knot on niobium, yttrium and rare-earth metals is recommended. Minerals-indicators of economic rare-earth and rare-metal mineralization are offered.
Keywords: Rare-metal and tin ore mineralization, rare-metal lithium-fluoric granite, zwitter, feldspatholite, albitite, Verkhneurmiysky tin ore knot, Far East.
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