Three species of the genus Crassatella, one species of the genus Astartarte and one species of the genus Eriphyla from Lower Cretaceous deposits of the Gaurdak-Kugitang District (southwestern spurs of the Gissar Ridge), eastern Turkmenistan, have been described.

New data on geological structures, paleontology and geochronometry of the surficial sedimentary mantle of the lower Yenissei basin have been obtained. The data allow to divide the Upper and Middle Pleistocene marine formations, exposed in river bluffs. The Kheta marine formation has been described on the Bolshaya Kheta River. The formation, sandwiched between two Middle Pleistocene till horizons, has yielded OSL data in range 230–190 ka and is correlated with MIS 7. The Kheta fauna contains a characteristic Pleistocene mollusk Cyrtodaria jenisseae Sachs, 1951, which extinct before the Late Pleistocene. The Kheta marine formation is overlain by the Taz till which is covered by marine silt and sand with boreal mollusk fauna and OSL age 130–100 ka. The latter is correlated with MIS 5e and covered by the Upper Pleistocene glacial complex in the Bolshaya Kheta basin. This marine formation composes a well-pronounced terrace in the Tanama basin. The marine terrace can be traced throughout the region, north of the Bolshaya Kheta basin.

The tectonic boundaries of the Anuy, Rauchuan, Chaun-Chuckchi and Wrangel folded zones were constrained offshore the Northern Chukotka folded area as a result of the comprehensive analysis of the geological and geophysical data. Five structural levels were revealed in the geological cross-section: Ellesmerian, Chuckotian, Beaufortian, Cretacious, and Cenozoic. The polystage tectonic history of the faults formation was suggested. The Pegtymelskaya sub-meridional shear zone separating the structures of the Wrangel and Chukchi zones was identified for the first time. The Billings regional fault established by seismic data is considered to be the northern distribution boundary of the Early Cretaceous granitoids of the Chukchi Orogeny and is located on the continuation of the Kobuk suture zone (Alaska). In the central part of the shelf, a system of Epielsmere (?) pull-apart pools (Dremhed, Baranovsky, and Denbars) formed in the Late Cretaceous submeridional transtensia is distinguished.

Tectonic structure of the southwestern Orenburg Region has been studied more precisely based on the reinterpretation of regional seismic time sections using the author’s target-oriented methodological techniques for identifying tectonic disturbances. It was concluded that the Orenburgskoye, Dimitrovskoye, Krasnoyarskoye, Chernigovskoye, Peschanoye, Nagumanovskoye, Kzilobinskoye, Staroklyuchevskoye, Terektinskoye, Akobinskoye, Sovhoznoye, Rozhdestvenskoye, Zapadno-Rozhdestvenskoye, Novopavlovskoye oil-and-gas fields are near-fault horst-shaped uplifts. It is suggested that during the Meso-Cenozoic, the southwestern part of the Orenburg Region underwent shear deformations to form flower-shaped structures in tectonically weakened zones. Recommendations are given for further hydrocarbon exploration in the study area.

Maps of the deep structure and tectonic zoning of the continent-ocean transition zone have been compiled for the Chukchi-Koryak-Kamchatka sector of the Pacific Fold Belt. The maps are part of a digital 1:1 M seamless maps package of the Far East area. A brief description of the crustal structure in the ocean-tocontinent transition zone is given. Data on the depth of the main structural surfaces such as the roof and the bottom of the consolidated crust, the thickness of the crust and its constituent parts – volcanic-sedimentary, granite-metamorphic and granulite-basitic layers are presented. The earth crust is represented by three types: oceanic, transitional and continental. The minimum thickness is 12 to 24 km in oceanic crust blocks, the maximum one is 40 to 47 km in continental blocks. The method of generalization of deep geophysical soundings and their correlation by means of density modeling was applied in map compiling.

The structure of the Tulai-Kiryak sheet-like intrusion of Southeast Taimyr is considered. The stark difference in the structure of the western and eastern flanks of the intrusion with complete pinching out of basite in the eastern part is shown. The intrusive genesis of quartz porphyry, which invaded the fault zone separating Permian and Triassic deposits, is substantiated. It was concluded that the age of basite (Permian, pre-orogenic) of the Tulai-Kiryak intrusion differs from that of alaskite granite (Late Triassic, late-orogenic). Fragments of alaskite granite in the eruptive breccia dyke located 1000 to 1200 m lower in the section from the Tulai-Kiryak intrusion suggests their deep source, not related to this intrusion. Abundant graphite in quartz porphyry and the roof of alaskite granite is noted.

The paper by V. A. Vinogradov’s paper is added by the recent history of the Tulai-Kiryak intrusion study, results of U-Pb dating (SHRIMP) while compiling state geological maps-1000/3. Problems of the intrusive granitoids origin are discussed and a conclusion is drawn on the possibility of their formation as a result of anatexis of Permian terrigenous strata that explains the age datings of zircons and high graphite content in them.

The article describes the development of guidelines for identifying areas promising for hydrogen sulfide water within artesian basins. In order to do that, it is necessary to determine the specific natural-geological setting in compliance with the developed methodological provisions. It is recommended to conduct studies without expensive field and drilling operations based on information obtained in previous years. All geological (lithological-facies, geological-structural, hydrodynamic, geothermal and geochemical) studies are based on results of geological exploration drilling and interpretation of results of geophysical surveys (seismic exploration, electrical exploration and thermometry) performed during the exploration of oil and gas fields.

The Gadir gold-sulfide deposit is located in the northwestern part of the Gedabek deposit in the Yogundag epithermal system. Ore-bearing strata are represented by Middle Jurassic volcanic and volcanic-sedimentary rocks formed under conditions of basalt-andesite-dacite-rhyolite volcanism formation. Mineralogy, gold mineralization, and metal content in the Gadir deposit have been investigated during ongoing studies to determine geological setting, temporal and spatial relationships with specific mineral assemblages and associations. Mine ralogy of ore bodies is mainly characterzed by pyrite, chalcopyrite, sphalerite, galena, magnetite, and native gold. Native gold was recorded in chalcopyrite that is probably related to the second stage of ore deposition.