Jurassic foraminifers from two boreholes in Teresa Claveness Bay of the north-eastern part of the Taimyr Peninsula were studied. They allowed to estimate the age and composition of the Jurassic deposits in Teresa Claveness Bay and it’s coast.

The paper portrays geological and geochemical history of the Circumpolar Arctic basement evolution; spatiotemporal inheritance of the basic structural and tectonic taxa during the pre-Mesozoic, Mesozoic and Cenozoic-Quaternary stages is demonstrated. The Mesozoic volcanic-terrigenous plate cover overlaying the acoustic basement of the Amerasian Basin is considered as a reliable benchmark for substantiating the continuity of the continental slope in the littoral – shelf – deep-sea rises and ridges system. Various age groups of riftogenic structures of the Circumpolar Arctic and the relationships of Jurassic-Cretaceous rifts to the closure of the East Pacific global spreading belt and Cenozoic-Quaternary rifts to the Mid-Atlantic one are characterized. The formation of the Gakkel Ridge is associated with the initial rifting without significant bottom expansion of the Eurasian Basin. Considerable contribution of rift systems of various ages to the established and predicted hydrocarbon and mineral potential of the Circumpolar Arctic are substantiated.

The paper is devoted to the mineralogical and geochemical composition of the Karabash ultramafic Massif and geochronological stages of its formation. The identification of such minerals as garnet, high-aluminum chromespinelides, and amphiboles evidences the multistage formation of the massif. The concentration of petrogenic, rare and rare earth elements indicates that ultramafic rocks have both mantle features and evidences of their transformation in the crustal environment.

New data obtained by mineralogical, petrographical, geochemical and isotope-geochronological studies of magmatic rocks within the Malmyzh and Poni gold-copper-porphyry ore fields are discussed. Geochronological data show a simultaneous – Cenomanian radiological age of their magmatic crystallization: 97–99 и 93 Ma, respectively. Based on comparative analysis of studied samples from the Malmyzh and Poni ore fields both with one another and with magmatic rocks from worldwide porphyry deposits, it is attempted to better understand geodynamic nature of their formation and detect the world areas with similar conditions of adakitic granitoid magmatism.

Local tectonic structures, which are components of intrusions forming the Bureya Massif, have been identified based on data of integrated airborne geophysical surveys (magnetometry, gamma-spectrometry, electrical prospecting) at a scale of 1:50,000 in the Bureya-Khanka Area. Prospects promising for skarnmagnetite and gold-polymetallic mineralization were discovered within the local tectonic structure.

Possibilities for the discovery of new Devonian-Early Carboniferous and Ediacaran primary diamond deposits, copper-nickel deposits and unconventional sources of hydrocarbon in the Arkhangelsk Region are discussed.

The study of large and very large gold nuggets extracted from placers in the Amur province since 1858 is described. The main nugget-forming formation is gold-quartz, the gold-polymetallic formation plays a lesser role, and the skarn type of mineralization plays an even smaller role. It has been identified that most of ore-placer clusters containing nuggets are confined to the central, most productive part of the province, and a smaller part to the southern and northern peripheries of the province. It is shown that the Gar River-2 Placer of the Yasnensky Cluster contains a nest of almost unrounded nuggets in quartz aggregates comparable in total weight to the world’s largest Holtermann Nugget.

In the paper, the author’s methodical approach to the interpretation of anomalous geochemical fields in terms of structural geology is suggested. The geostructural map of the studied part of the Mongoli ore field was compiled based on the interpretation of mono- and polyelemental anomalous geochemical fields. Geodynamic environments of formation of the Cu-Mo with minor Au mineralization and the Au mineralization are described. A conclusion is made about their multi-stage formation. Geostructural criteria for the identification of promising areas, ore zones and bodies are proposed.

The 20th International Geological Congress in Mexico in 1956 is the first major international meeting for Soviet geologists after World War II and the first travel abroad of a large delegation of Soviet geologists. The Soviet delegation of 58 people participated in the work of the Congress and excursions with 37 oral presentations and 142 abstracts published in the Congress Proceedings. Active participation in the work of the Congress Council made it possible to make a number of important decisions, including the preparation of Tectonic and Metallogenic maps of the world. Soviet scientists were included in the majority of the commissions of the Congress. Participation in the Mexican session of the IGC was the beginning of the successful integration of Soviet geologists into the world geological community and was a catalyst for further development of geoscience.