No 5 (2017)
3-15 389
Abstract
New paleomagnetic and isotopic-geochronological data obtained for Neoarchean Onega granulite complex, were used to reconstruct the position of the Karelian craton in the Neoarchean supercontinent Kenorland. Geological correlations were made for the Karelian, Kaapvaal, Pilbara, Superior, and Slave cratons. Comparison of independent geological and paleomagnetic data allowed us to propose a new configuration of the Neoarchean supercontinent Kenorland. The position of the ancient core of the Karelian craton (the Vodlozero terrane), located in the North-Western margin of the supercontinent structure, reconstructed based on the previously paleomagnetic data for the Neoarchean Panozero sanukitoid massif and new one for granulite of Onega complex.
16-23 245
Abstract
The complex tectonic structure of the Okhotsk Sea shelf and high geodynamic activity makes it necessary to use of geomechanical modeling for the prediction of the secondary reservoir properties of collectors. 3D model of fractured porosity and permeability for Kirinskoye, Ayashsky and East-Odoptinsky license areas was built. The results of modeling revealed filtration channels where can occur both vertical and horizontal migration of hydrocarbons. It is found that the secondary permeability significantly is different of the upper and lower stratigraphic horizons and the okobykayskaya clay stratum is the surface, which is a regional tire. All calculations were performed on a 3D grid geological model, which allows using the data for hydrodynamic modeling.
24-28 373
Abstract
This article describes the fluidolite’s breccias which are located in the Darial Gorge of the North Caucasus. Fluidolite’s breccias are connected with explosive eruptions in the Late Pleistocene and caused decompressive explosions of high fluidized magma at small depths.
29-40 305
Abstract
A strata of clays and clay aleurolites with olistoliths and olistoplaques is outlined on the seaside in the north-west in the Agoi river valley. Sediments of the strata are composed of grey calcareous clays with layers of aleurolites. The layers and lenses of olistostromes contain small fragments, large blocks and large olistoplaques of various ages. From various layers of strata, from a matrix and olistostoliths a microfauna is selected and defined. Small structural forms (slickensides and tension gashes) were recognized in olistoliths and olistoplaques, which are not traced in the matrix, this indicates that a series of folded and fissured structures were formed before these olistoliths and olistoplaques appeared in the olistostrome strata. Thickness of strata is estimated at 280 m.
41-48 265
Abstract
Depositional conditions at the Cenomanian-Turonian time were specified and cyclostratigraphic scheme of correlation of the Turonian sections was proposed based upon generalizations of our own results concerning sections of Voronezh anteclise, Ulyanovsk-Saratov trough, Crimea and the Caucasus.
49-58 273
Abstract
The chemical composition of interstitial waters from several of inland seas and NPWS, exposed to anthropogenic pollution. The regularities of distribution of pollution in the Dnieper-Bug estuary and Gelendzhik Bay of the Black sea in the Eastern Harbor of Alexandria Mediterranean Sea. Most of the contamination confines to the upper layers of sediments and near mouth zones. A significant role is played by secondary contamination related to the dissolution and accumulation of metals and nutrients in the interstitial water and their migration in the water column. When factor analysis for the aggregate impact of potentially mobile forms of metals in the Diepr-Bug estuary factor of anthropogenic pollution came in first place. Studies pollution in the Pjasino Lake near town Norilsk.
59-67 298
Abstract
Dust fallout is one of the major sources of soil pollution in urban landscapes. In this study possibilities of portable X-ray fluorescence spectrometers in dust load monitoring from a highway were shown. The composition of atmospheric dust from the Moscow Ring Road in 2011-2015 years was estimated using Thermo Niton XL3t. Based on available data the variations of the dust and toxic metal loads (e.g. Zn, Pb, Cu, Ni, Cr, V and Mn) were traced over the last fifteen years.
68-76 317
Abstract
In the current work, the platinum group minerals of massif chromitites of Iovsky dunite massif are firstly fully characterized. Chromitites are composed of chromoshpinelide with increased in comparison with chromoshpinelides from other zoned clinopyroxenite-dunite massifs contents of Cr, but their composition keeps within trend of dunite-clinopyroxenite-gabbro magmatic formation. PGE minerals, and in particular Pt-Fe solid solutions, are found in chromitites or directly in chromoshpinelide as distinct crystals or aggregates of irregular non- crystallographic habit and rarely with euhedral cubic habit. Composition of Pt-Fe minerals corresponds to stoichiometry of ferroplatinum (Pt2Fe) and isoferroplatinum Pt3Fe. Minerals of isomorphous system tetraferroplatinum-tulameenite-nickelferroplatinum are widely developed. Thus, platinum mineralization of Iovsky dunite massid has typical features of clinopyroxenitedunite complexes of Urals.
77-84 454
Abstract
The paper presents new data on contents of major and micro components from low TDS nitrogen thermal water located within Khoja-Obi-Garm spa (Tajikistan). It was found that these thermal groundwaters contain high contents of the following components: F, Si, Li, Al, Rb, Sr, Cs. Detailed study of the geological and hydrogeological settings of the spa together with thermodynamic simulations allows us reveal sources of chemical elements into these waters. It was carried out the comparison of thermal groundwater from Khoja-Obi-Garm spa with the thermal waters of other regions of Eurasia, also new data on the rare earth elements and yttrium (REY) concentrations in studied thermal water are presented.
ISSN 0579-9406 (Print)