The duration of formation of mobile zones of Caledonides, Hercynides, Kimmerides and Alpides is on average the same and is 160+/-15 Ma. The ratio of the time of formation of orogenic structures to geosynclinal structures proper in the mobile zones hosting large stratified deposits of lead and zinc is 10 %, volcanogenic copper-zinc deposits - 33 %, and rare-metal (Sn, W, Mo, Ai) - 75 %. This circumstance is connected, apparently, with the degree of warming of the Earth's crust and its processing by mantle fluid flows.
Application of decryptometric survey for disassembling bearing rare-metal mineralization of granite massif of East Transbaikalia gave positive results. Two types of decryptograms are observed. The first one, with a distinct maximum in the temperature range of 300-550 °С, is characteristic for samples from steaming halos of unpromising Taptanai and Sakhanai massifs. The second, with distinct maxima at temperatures of 120; 250 and 400-600 °С, is characteristic of samples from the halos of the Dedonogorsky and Etykinsky massifs, which are associated with industrial rare-metal mineralization.
Месторождения горного хрусталя на Приполярном Урале были открыты в тридцатых годах, когда разведочные работы с целью отыскания коренных источников ставились по находкам поверхностных россыпей кристаллов кварца. В дальнейшем основное внимание геологов, изучавших и разведывавших месторождения горного хрусталя, было направлено на изучение условий образования и закономерностей размещения хрусталеносных тел. В решении этой проблемы достигнуты большие успехи, и в настоящее время установлено значительное число косвенных признаков, указывающих на возможность обнаружения на данном участке слепых гнезд горного хрусталя ...
Одним из существенных вопросов, возникающих при анализе структур рудных полей, является установление меры и характера влияния на форму и пространственное положение рудных объектов специфики физико-механических свойств вмещающих горных пород. Интересные материалы по этому вопросу были получены при изучении месторождений Сураизского хрусталеносного поля Приполярного Урала. Большая роль принадлежит здесь типу структур разлинзования, развитых во вмещающих горных породах ...
Until very recently, a common view of pegmatite genesis has not been established among a large circle of geologists studying pegmatite deposits. A. E. Fersman's theory of pegmatite formation is still widely popular. The enormous work of A. E. Fersman and his group of colleagues, aimed at collecting materials characterizing the mineral composition of pegmatites in almost all regions of the USSR, played a major positive role, attracting general attention to these deposits and thereby facilitating their rapid industrial development. This group of researchers rightly established that the formation of pegmatites is a very complex process occurring in changing physicochemical conditions and that, in accordance with changes in crystallization conditions, the paragenetic associations of the resulting minerals change. However, a number of fundamental provisions of A. E. Fersman's general theory of pegmatite genesis, as is known, have not been justified. A. E. Fersman's ideas that pegmatites are formed by means of successive crystallization in a closed system, the so-called pegmatite water-fire melt, highly enriched in volatile components, have long been met with objections.
In the summer of 1910, participating as a lecturer in the compilation of a geological map of the Mount Vysokaya (the work was carried out by Professor V. V. Nikitin at the invitation of the Board of the Nizhnii-Tagil Plants), I compiled a collection of rocks. This may be of interest for elucidating the composition of the constituent rocks, as well as the genesis of the origin of this large deposit of magnetic iron ore.
