Геология России: Recent submissions

Now showing items 561-580 of 41109

A UNIQUE RECORD OF P-T HISTORY OF HIGH-GRADE POLYMETAMORPHISM

Perchuk L.L.; Varlamov D.A.; Van Reenen D.D. (2006)

Precambrian granulite complexes repeatedly affected by high-temperature polymetamorphism (HTM) retain records of thermal and dynamic history of both events. Repeated high-grade metamorphism should apparently create a new ...
THE LUDICOVIAN-KALEVIAN BOUNDARY IN THE NORTHERN LADOGA REGION: GEOLOGICAL RELATIONS AND ISOTOPIC AGE

Matrenichev V.A.; Vrevsky A.V.; Sergeev S.A.; Matukov D.A. (2006)

Supracrustal rocks in the northern Ladoga region are mainly represented by rock associations of the Karelian Complex (2.1–1.65 Ga). The section is divided into the Ludicovian Suprahorizon (metavolcanites of the Sortavala ...
SC-BEARING COALS FROM YAKHLINSK DEPOSIT, WESTERN SIBERIA

Seredin V.V.; Arbuzov S.I.; Alekseev V.P. (2006)

The average Sc content in coals of the world is estimated at 2–4 g/t [1–5]. Occasionally, the Sc concentration can reach 10–15 g/t of coal and 100–200 g/t of ash . The latter concentrations are comparable with those in ...
ASSESSMENT OF DIACHRONISM OF BIOSTRATIGRAPHIC BOUNDARIES BY MAGNETOCHRONOLOGICAL CALIBRATION OF ZONAL SCALES FOR THE LOWER CRETACEOUS OF THE TETHYAN AND BOREAL BELTS

Guzhikov A.Yu.; Baraboshkin E.J. (2006)

Complex bio- and magnetostratigraphic studies of Lower Cretaceous deposits in the central Volga region, Northern Caucasus, and other regions carried out by the authors of the present communication for more than 10 years ...
BASANITES OF MT. KHUKHCH: FIRST MINERALOGICAL-GEOCHEMICAL DATA ON THE NEOGENE K-NA ALKALINE MAGMATISM IN WESTERN KAMCHATKA

Perepelov A.B.; Puzankov M.Yu.; Filosofova T.M.; Ivanov A.V. (2006)

Geotectonic reconstruction of the Cenozoic structure of western Kamchatka suggests the wide development of rifting in Paleogene and Neogene in this region[1]. However, magmatic complexes typical of this geodynamic setting ...
COMPARATIVE GEOCHEMISTRY OF GRANITOIDS AND METAMORPHIC COUNTRY ROCKS IN THE WESTERN ANGARA-VITIM BATHOLITH, WESTERN BAIKAL AREA

Antipin V.S.; Makrygina V.A.; Petrova Z.I. (2006)

This paper presents materials of granitoids from the western Angara-Vitim batholith and the country gneisses and migmatites of the Talanchan Metamorphic Complex. The granitoids of the older intrusive phases of the Barguzin ...
CLIMATIC FIELDS OF HORIZONTAL TEMPERATURE GRADIENTS OF WATER IN THE SOUTH ATLANTIC

Galerkin L.I.; Gritsenko A.M.; Panfilova S.G. (2006)

The vertical structure of ocean water has been sufficiently well studied at present. Its principal elements—layers of discontinuity, warm and cold layers, saline and fresh layers, and their statistic and extreme ...
CHEMICAL DIFFERENTIATION OF THE GALILEAN SATELLITES OF JUPITER: 4. ISOCHEMICAL MODELS FOR THE COMPOSITIONS OF IO, EUROPA, AND GANYMEDE

Kronrod V.A.; Kuskov O.L. (2006)

Models for the composition and structure of the Galilean satellites of Jupiter (Io, Europa, and Ganymede) were constructed using geophysical data provided by the Galileo mission on the mass, average density, and moment of ...
MODELING OF GEOCHEMICAL PROCESSES THAT OCCURRED DURING THE FORMATION OF THE SCHLEMA DEPOSIT, ERZGEBIRGE. I. SYNMINERALIZATION PROCESSES IN THE AUE GRANITES

Barsukov V.L. (2006)

The geochemical events that occurred within the outlines of the Schlema ore field during the formation of vein bodies cannot be understood without considering the processes that occurred synchronously in the footwall zone, ...
PALLADIUM SOLUBILITY IN WATER-BEARING SILICATE MELTS: EVIDENCE FROM EXPERIMENTAL DATA

Bezmen N.I.; Gorbachev P.N.; Azif E.; Naldrett A.J. (2006)

One of the most interesting geological problems, bearing both theoretical and practical significance, is the study of PGE geochemistry in the formation of the Earth’s crust and mantle and in differentiated maficultramafic ...
PRESENT-DAY SALT REGIME IN RESERVOIRS OF THE MANYCH RIVER BASIN

Matishov G.G.; Matishov D.G.; Gargopa Yu.M. (2006)

The reservoir system of the Manych River basin is located in the Kuma–Manych Depression of the southern Russian region, which is characterized by an arid climate, a shortage of water resources, and the development of salt ...
SOIL PHOSPHORUS AVAILABILITY AND TRANSFORMATION RATES IN RELICTIC PINSAPO FIR FORESTS FROM SOUTHERN SPAIN

Viñegla B.; García-ruiz R.; Liétor J.; Ochoa V.; Carreira J.A. (2006)

Abies pinsapo fir forests are remnant of temperate-like coniferous forests currently subjected to the typical seasonal constraints of Mediterranean-type climates. We have examined for the first time, P availability and ...
SM-ND AND RB-SR DATING OF HIGH-PRESSURE METEGRANITES IN THE EAST URAL UPLIFT, THE SOUTHERN URALS

Osipova T.A.; Vinogradov V.I.; Bujakaite M.I.; Gorozhanin V.M.; Gol'tsman Yu.V. (2006)

The problem of eclogite formation occupies an important place in paleodynamic reconstructions of the geological history of the Urals. To date, the overwhelming majority of researchers have accepted that the eclogite–glaucophane ...
MELT EVOLUTION DURING THE CRYSTALLIZATION OF BASANITES OF THE TERGESH PIPE, NORTHERN MINUSINSK DEPRESSION

Timina T.Yu.; Sharygin V.V.; Golovin A.V. (2006)

In this paper we describe the mineralogy and geochemistry of and melt inclusions in minerals from the Tergesh pipe, northern Minusinsk Depression. The rocks are composed of olivine and clinopyroxene phenocrysts and a ...
THE RELATIVE UPTAKE OF CA AND SR INTO TREE FOLIAGE USING A WHOLE-WATERSHED CALCIUM ADDITION

Dasch A.A.; Blum J.D.; Eagar Ch.; Fahey T.J.; Driscoll Ch.T.; Siccama T.G. (2006)

The use of strontium isotopes and ratios of alkaline earth elements (i.e., 87Sr/86Sr and Ca/Sr) to trace Ca sources to plants has become common in ecosystem studies. Here we examine the relative uptake of Ca and Sr in trees ...
WILL THE RIVER IRTYSH SURVIVE THE YEAR 2030? IMPACT OF LONG-TERM UNSUITABLE LAND USE AND WATER MANAGEMENT OF THE UPPER STRETCH OF THE RIVER CATCHMENT (NORTH KAZAKHSTAN)

Hrkal Z.; Gadalia A.; Rigaudiere P. (2006)

The Irtysh river basin all the way from river spring in China across Kazakhstan as far as the Russian part of Siberia is among the most ecologically endangered and affected regions on our planet. The study provides a summary ...
REMEDIATION OF GROUND WATER CONTAINING CHLORINATED AND BROMINATED HYDROCARBONS, BENZENE AND CHROMATE BY SEQUENTIAL TREATMENT USING ZVI AND GAC

Plagentz V.; Ebert M.; Dahmke A. (2006)

A laboratory experiment with two sequenced columns was performed as a preliminary study for the installation of a permeable reactive barrier (PRB) at a site where a mixed ground water contamination exists. The first column ...
MAGMATISM OF THE KAROO-MAUD SUPERPLUME IN THE SCHIRMACHER OASIS, EAST ANTARCTICA

Belyatskii B.V.; Sushchevskaya N.M.; Leichenkov G.L.; Mikhal'skii E.M.; Laiba A.A. (2006)

The origination of large plateau basalt provinces in the Earth’s geological history has traditionally been referred to the deep thermal convection caused by plume geodynamics. The emplacement of a large plume into the ...
CLAY MINERALS IN EARLY AMPHIBOLE WEATHERING: TRI- TO DIOCTAHEDRAL SEQUENCE AS A FUNCTION OF CRYSTALLIZATION SITES IN THE AMPHIBOLE

Proust D.; Caillaud J.; Fontaine C. (2006)

The early stages of amphibole weathering result in the crystallization of several clay mineral species: tri- and dioctahedral smectites, interstratified dioctahedral kaolinite-smectite (K-S), and halloysite. Each clay ...
DECADAL-SCALE DYNAMICS OF WATER, CARBON AND NITROGEN IN A CALIFORNIA CHAPARRAL ECOSYSTEM: DAYCENT MODELING RESULTS

Li X.; Meixner T.; Sickman Ja.O.; Miller A.E.; Schimel J.P.; Melack J.M. (2006)

The Mediterranean climate, with its characteristic of dry summers and wet winters, influences the hydrologic and microbial processes that control carbon (C) and nitrogen (N) biogeochemical processes in chaparral ecosystems. ...

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