Геология России: Recent submissions

Now showing items 1481-1500 of 40749

EARLY PROTEROZOIC SYN-AND POSTCOLLISION GRANITES IN THE NORTHERN PART OF THE BAIKAL FOLD AREA

Larin A.M.; Sal'nikova E.B.; Yakovleva S.Z.; Kovach V.P.; Kotov A.B.; Makar'ev L.B. (2006)

Early Proterozoic granitoids are of a limited occurrence in the Baikal fold area being confined here exclusively to an arcuate belt delineating the outer contour of Baikalides, where rocks of the Early Precambrian basement ...
ФОРМИРОВАНИЕ КОЛЧЕДАННЫХ ЗАЛЕЖЕЙ В УСЛОВИЯХ КОНВЕКТИВНО-РЕЦИКЛИНГОВОЙ МОДЕЛИ

Абрамова Е.Е. (2006)

Конвективно-рециклинговая модель рудогенеза, изначально разработанная для субмаринныхместорождений колчеданного семейства, в дальнейшем оказалась применимой и к другим месторождениям.
DISCOVERY OF WHITLOCKITE IN MANTLE XENOLITHS: INFERENCES FOR WATER- AND HALOGEN-POOR FLUIDS AND TRACE ELEMENT RESIDENCE IN THE TERRESTRIAL UPPER MANTLE

Ionov D.A.; Hofmann A.W.; Gurenko A.A.; Hellebrand E.; Merlet C.; Montagnac G.; Gillet P.; Prikhodko V.S. (2006)

Chemical analyses and Raman micro-spectroscopy have identified whitlockite (water- and halogen-free phosphate) in mantle xenoliths from Siberia. Whitlockite has not previously been reported from terrestrial mantle-derived ...
BEHAVIOR OF H2O MOLECULES IN THE CHANNELS OF NATROLITE AND SCOLECITE: A RAMAN AND IR SPECTROSCOPIC INVESTIGATION OF HYDROUS MICROPOROUS SILICATES

Kolesov B.A.; Geiger C.A. (2006)

Single-crystal polarized Raman spectra (80 to 4000 cm-1 at 4 ≤ T ≤ 700 K) and powder IR spectra (1500 to 4000 cm-1 at 50 < T < 300 K) were measured for two microporous zeolites natrolite, Na16[Al16Si24 O80]·16H2O, and ...
FORAMINIFERS AND RADIOLARIANS ACROSS THE ALBIAN-CENOMANIAN AND CENOMANIAN-TURONIAN BOUNDARIES (NORTHERN PERI-TETHYS)

Vishnevskaya V.S.; Bragina L.G.; Gorbachik T.N.; Kopaevich L.F. (2006)

Changes in morphological diversity and taxonomic composition of late Albian-early Turonian foraminiferal and radiolarian assemblages from the northern Peri-Tethys are considered. Several stages are defined in evolution of ...
PRECIOUS METAL AND TELLURIDE MINERALOGY OF LARGE VOLCANIC-HOSTED MASSIVE SULFIDE DEPOSITS IN THE URALS

Vikentyev I.V. (2006)

The study focuses on the mode of occurrence of Au, Ag and Te in ores of the Gaisk, Safyanovsk, Uzelginsk and other volcanic-hosted massive sulfide (VHMS) deposits in the Russian Urals. Minerals containing these elements ...
A LOW-TEMPERATURE HEAT-CAPACITY STUDY OF SYNTHETIC ANHYDROUS MG-CORDIERITE (MG2AL4SI5O18)

Paukov I.E.; Kovalevskaya Y.A.; Rahmoun N.-S.; Geiger C.A. (2006)

The heat capacity of synthetic anhydrous Mg-cordierite (Mg2Al4Si5O18) was measured using adiabatic calorimetry between 6 and 300 K. Mg-cordierite was synthesized from a glass of stoichiometric cordierite composition at ...
TRACE ELEMENT AND SR-PB-ND-HF ISOTOPE EVIDENCE FOR ANCIENT, FLUID-DOMINATED ENRICHMENT OF THE SOURCE OF ALDAN SHIELD LAMPROITES

Davies G.R.; Stolz A.J.; Mahotkin I.L.; Nowell G.M.; Pearson D.G. (2006)

A phase of Mesozoic extension associated with the termination of continental collision at the southern margin of the Aldan Shield produced ultrabasic lamproites in a discontinuous belt 500 km long and ~150 km wide. The ...
PRESSURE EFFECTS ON THE REDUCED PARTITION FUNCTION RATIO FOR HYDROGEN ISOTOPES IN WATER

Polyakov V.B.; Horita J.; Cole D.R. (2006)

We have developed a simple, yet accurate theoretical method for calculating the reduced isotope partition function ratio (RIPFR) for hydrogen of water at elevated pressures. This approach requires only accurate equations ...
NANOMETER-SIZE P/K-RICH SILICA GLASS (FORMER MELT) INCLUSIONS IN MICRODIAMOND FROM THE GNEISSES OF KOKCHETAV AND ERZGEBIRGE MASSIFS: DIVERSIFIED CHARACTERISTICS OF THE FORMATION MEDIA OF METAMORPHIC MICRODIAMOND IN UHP ROCKS DUE TO HOST-ROCK BUFFERING

Hwang S.-L.; Chu H.-T.; Yui T.-F.; Shen P.; Schertl H.-P.; Liou J.G.; Sobolev N.V. (2006)

Nanometer-size P/K-rich silica glass (former melt) inclusions were identified within metamorphic microdiamonds from garnets of ultrahigh-pressure (UHP) gneisses of the Kokchetav and the Erzgebirge massifs by analytical ...
THE CAMPANIAN-MAASTRICHTIAN STAGE BOUNDARY IN THE AKTULAGAI SECTION (NORTH CASPIAN DEPRESSION)

Naidin D.P.; Beniamovski V.N. (2006)

Distribution of belemnites and benthic foraminifers in the Campanian-Maastrichtian boundary layers of the Aktulagai section, one of Upper Cretaceous reference sections in the east of the European paleobiogeographic region ...
ГЕОЛОГО-ГЕНЕТИЧЕСКАЯ МОДЕЛЬ ФОРМИРОВАНИЯ РУД МЕДНО-ПОРФИРОВЫХ МЕСТОРОЖДЕНИЙ АЛМАЛЫКСКОГО РУДНОГО РАЙОНА, УЗБЕКИСТАН

Туресебеков А.Х.; Василевский Б.Б. (2006)

Изучение рудных формаций, взаимоотношений их с магматическими образованиями, минералогических, геохимических особенностей и характера метасоматических изменений, проведенное под руководством Х.М.Абдуллаева, позволило ...
TE AND SE MINERALOGY OF THE HIGH-SULFIDATION KOCHBULAK AND KAIRAGACH EPITHERMAL GOLD TELLURIDE DEPOSITS (KURAMA RIDGE, MIDDLE TIEN SHAN, UZBEKISTAN)

Plotinskaya O.Yu.; Kovalenker V.A.; Seltmann R.; Stanley C.J. (2006)

The Late Paleozoic Kochbulak and Kairagach deposits are located on the northern slope of the Kurama Ridge, Middle Tien Shan, in the same volcanic structure and the same ore-forming system. Au-Ag-Cu-Bi-Te-Se mineralization ...
REDOX STATE OF ECLOGITES AND PERIDOTITES FROM SUB-CRATONIC UPPER MANTLE AND A CONNECTION WITH DIAMOND GENESIS

Simakov S.K. (2006)

Pressure-Temperature- fO2 conditions and fluid compositions estimated for mineral parageneses from inclusions in diamonds, diamond-bearing and diamond-free xenoliths using a garnet-clinopyroxene-silica oxygen barometer ...
NEW DATA ON UPPER KIMMERIDGIAN-TITHONIAN BIOSTRATIGRAPHY AND AMMONITES OF THE EASTERN CRIMEA

Arkad'ev V.V.; Rogov M.A. (2006)

Based on ammonites, Upper Kimmeridgian sediments are first established in the Crimean Mountains. The Kimmeridgian-Tithonian boundary recognizable in a continuous section is placed inside the Dvuyakomaya Formation of uniform ...
EVOLUTION OF PALEOPROTEROZOIC MAGMATISM: GEOLOGY, GEOCHEMISTRY, AND ISOTOPIC CONSTRAINTS

Sharkov E.V.; Bogina M.M. (2006)

Evolution of tectono-magmatic processes in the Paleoproterozoic is divisible into four stages each controlled by its own type of endogenic activity. The critical moment in geological history was at the third stage onset ...
DENSITIES AND APPARENT MOLAR VOLUMES OF CONCENTRATED AQUEOUS LICL SOLUTIONS AT HIGH TEMPERATURES AND HIGH PRESSURES

Abdulagatov I.M.; Azizov N.D. (2006)

A constant-volume piezometer immersed in a precision liquid thermostat was used to measure the densities of aqueous LiCl solutions from 0.129 to 15.498 mol kg- 1, 291.25 to 607.71 K, and 0.961 to 30.55 MPa. The total ...
THE EARLY VENDIAN MICROFOSSILS FIRST FOUND IN THE RUSSIAN PLATE: TAXONOMIC COMPOSITION AND BIOSTRATIGRAPHIC SIGNIFICANCE

Veis A.F.; Vorob'eva N.G.; Golubkova E.Yu. (2006)

The microfossils studied are discovered for the first time in the Riphean-Lower Vendian deposits, which have been recovered in 2002 by the Kel'tminskaya-1 deep parametric borehole in the Vychegda depression, the northeastern ...
RB-SR, K-AR, H-AND O-ISOTOPE SYSTEMATICS OF THE MIDDLE RIPHEAN SHALES FROM THE DEBENGDA FORMATION, THE OLENEK UPLIFT, NORTH SIBERA

Gorokhov I.M.; Mel'nikov N.N.; Turchenko T.L.; Zaitseva T.S.; Kutyavin E.P.; Semikhatov M.A.; Ivanovskaya T.A.; Arakelyants M.M.; Fallick E.A. (2006)

Clay subfractions (SFs) of <0.1, 0.1-0.2, 0.2-0.3, 0.3-0.6, 0.6-2 and 2-5 μm separated from Middle Riphean shales of the Debengda Formation are studied using the TEM, XRD, K-Ar and Rb-Sr isotopic methods. The oxygen and ...
ON THE H-FORM OF NATROLITE

Likhacheva A.Yu.; Belitsky I.A.; Veniaminov S.A.; Paukshtis E.A. (2006)

To resolve the problem of existence of the H-form of natrolite, the thermal decomposition of NH4-exchanged natrolite (as a precursor of the H-form) was studied by gas chromatography, IR spectroscopy and X-ray diffraction. ...

Now showing items 1481-1500 of 40749

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