No 2 (2016)
3-17 361
Abstract
This article is a continuation of study of the reference section Alan Kyr (Central Crimea, Belogorsk region). Recorded the difference in age between complexes dating of radiolarians and planktonic foraminifera and benthic foraminifera. A likely explanation for this can be assumed that in the Crimea stratigraphically important taxa could appear before f few million years. Than on the platform where they could migrate during major global eustatic transgression in the early Campanian age. The article discusses the impact of paleobiogeographical aspect on taxonomic composition of foraminiferal zonal complexes as plankton and benthos.
18-23 221
Abstract
The analysis of the submicroscopic textures of the cobalt-rich ferromanganese crusts Magellan mountains showed that biofilm - the builders of ferromanganese stromatolite - master petrogenetic components (SiO2, Al2O3, P2O5 and others) from the environment and are used they for the formation of columnar structure.
24-33 226
Abstract
Determination of petrophysical parameters in conjunction with the geological-structural and mineralogical and petrographic study of rocks is necessary to assess the conditions of localization of uranium-molybdenum ore prospects of their processing and assessment of the extent of mineralization at largest vein-stockwork Antei deposit in Russia, located in the granitoid basis of Strel'tsovskaya caldera in the southeastern Transbaikalia.
34-43 305
Abstract
Geological prospecting indicators of the potential presence of the Witwatersrand-type large and superlarge noble metal deposits containing optional Pt, Ir, Os, Rh, U, and diamond are presented. Perspective areas of native gold enrichment in the northeastern Siberian Platform are indicated. Gold metallogeny of this region was basically developed in Early Precambrian in association with greenstone belts and granulite-gneiss complexes. Promising zones with noble metal mineralization encompass large areas at the junction of tectonic provinces.
44-51 402
Abstract
Based on lithological and micropaleontological studies of geosection and geochemical investigations (lumino-bituminological, gas-liquid chromatography, pyrolysis, isotopes) of organic matter of rocks Kuma Formation authors justify oil and gaz potential of source rock formed during Bartonian depositional environment and define possible potential area of research, where possible the plays with this formation.
52-58 243
Abstract
Vertical electrical sounding is a traditional method of exploration of sand-gravel mix deposits. At present geophysicists are challenged not only to discover of the as-dug gravel, but also to determine its basic properties, allocate within the deposits plots with high percentage of gravel or determine the content of clay particles in the sands. To meet these challenges it is necessary to use new methods, in particular, the method of induced polarization. The paper presents the results of DC/IP surveys executed in the territory of Mosalsky district of Kaluga region in 2015. The work was carried out as already known, developed fields of sand-gravel mix deposits, as well as new search areas, which have not yet conducted drilling works. As shown by the results all the deposits of sand-gravels are characterized by high values of induced polarization. The complex selection of the curves of apparent resistivity and apparent polarizability substantially narrows the boundaries of equivalent models in the interpretation of data in complex geological situations where sand and gravel deposits slightly different from the surrounding rocks or covered with a thick layer of conductive loam.
SHORT MESSAGES
59-63 291
Abstract
The paper considers laboratory results of the composition, structure and properties for frozen and thawed soils at west coast of Baydara Bay. Experimental data of unfrozen water content and thermal properties are discussed and summarized for different soils. The roles of soil salinity and organic matter content on these data were estimated for frozen and thawed soils.
ISSN 0579-9406 (Print)