Download PDF

NEW DATA ON THE KARAKOLSKAYA URANIUM-RARE METALLIC MAGMA-ORE-METASOMATIC SYSTEM OF THE GORNY ALTAI

A. I. Gusev

V.M.Shukshin Altai State Humanities Pedagogical University, Biysk, Altai Krai, Russia

New data about geological structure and composition of magmatic, ore formations and wallrock metasomatic alterations of the complex Karakolskoe deposit of the Gorny Altai. The same-name stock has zonal structure and it is composed of two binary granites with predominance of biotite, two-micas leucogranites with predominant muscovite, muscovite leucogranites, fine-grained two-micas leucograniteporphyres and dikes of aplites and alaskites. Stock rocks are due to the mixture of meltings various in composition: calc-alkalic low-aluminum one and high-aluminum adakitic one with different degrees of partial melting of garnetiferous amphibolite. The tetradic effect of the REE M-type fractionation manifests in rocks. Beryllium concentrations in rocks rise with an increase in value of tetradic effect of the REE M-type fractionation that is because of transfer of metal by complex compounds of fluorine in magmagene fluids. The data presented make it possible to single out the stock in the independent Karakolskiy graniteleucogranite complex of the Early Triassic. The ore mineralization is represented by a greisen-molybdenite mineral type with beryl, molybdenite, chalcopyrite, pyrite, bismuthine. The tantalum-niobium mineralization is discovered at first. The late type of ore mineralization is represented by lodes of carbonates with torbernite, metatorbernite and autunite.

Keywords: granites, leucogranites, aplites, stock, dikes, tetradic effect of fractionation of REE M-type, lodes, greisens, beryllium, molybdenium, copper, bismuth, tantalium, niobium, uranium.

DOI 10.20403/2078-0575-2020-1-70-80