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Browsing ELibrary by Title
Now showing items 11634-11653 of 21768
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(1997)A zircon age was determined for diorite from the Zhemchuzhnyi drusite complex, which was used as a reference complex in recognizing the prefolding and premetamorphic basites. There are two populations of zircon which differ ...
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(1998)Recent finds of conodonts indicate that the volcanogenic sequence in the Gobi Altai-Suhe Bator Zone of southern Mongolia (the Gobi Altai Formation in the Dzhinsetu Ulul Range area and the Minzhin Formation in the Mandai ...
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(2000)Two sections of Albian-Cenomanian boundary beds are studied in the Bakhchisarai area of the southwestern Crimea near the Research-Training Center of the Geological Faculty of the Moscow State University. Ages of ...
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(1995)Albite feldspar was hydrolyzed over a wide-range of pH conditions at 100, 200 and 300°C. The release rates of Na, Al, and Si were measured as a function of time from the initial, pre-steady-state phase to the attainment ...
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(1997)Samples of albite feldspar were dissolved at 300°C and 170 bars for periods up to 24 h in flow-through reactors at acid, neutral, and basic pH conditions. Three MeV ion beam techniques, Resonant Nuclear Reaction Analysis ...
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(1997)Measured H and Na concentration depth profiles in albite samples dissolved at 300°C at various pH conditions (Hellmann et al., 1997-Part III) are indicative of the complex nature of diffusion within leached/H-enriched ...
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(2000)Since the large number of the valuable analog records of earthquakes (seismograms, magnetograms, and the like) can not be used for direct computer processing, as well as because of the short life of the conventional data ...
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(2001)The chemical composition (alkalinity, pH, NH4+, PO43-, Si, H2S, Cl-, Ca2+, and SO42-) of interstitial water was studied in the sediments of the Sea of Okhotsk at sites of methane emission. Variations in alkalinity were ...
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(2002)At global as well as at regional scale, the lithosphere appears faster to Love waves than to Rayleigh waves. This Love-Rayleigh discrepancy can be modelled by introducing transverse isotropy in the upper mantle. In some ...
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(2003)The new results of radio-carbon dating using accelerating mass spectrometry technique (AMS) for palynological concentrate extracted from syngenetic Late Pleistocene ice-wedge ices of Bison section are compared with ...
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(2004)We present models for the P and S velocity structure of the upper mantle beneath the East European platform including measurements of radial anisotropy. The models were obtained by full waveform inversion of 3-component ...
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(2003)The anisotropy of magnetic susceptibility (AMS) of single crystals of biotite, muscovite and chlorite has been measured in order to provide accurate values of the magnetic anisotropy properties for these common rock-forming ...
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(1986)A special aeromagnetic survey was carried out along six east-west geotraverses crossing the Urals at 52°, 54°, 56°, 58°, 60°, 62° N. The long-wavelength component of the anomalous magnetic field (AMF), containing information ...
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(2001)The study of bathymetric, single-channel seismic and CDP profiling data, and modern seismicity for the Knipovich Ridge reveals its discordance with respect to the surrounding structural grain, suggesting that it is a recent, ...
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(1988)Measurements of crustal deformations provide important quantitative data for use in the study of the properties of materials and processes in the Earth's interior, and also for the purposes of delineation of active faults ...
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(2003)Magnetotelluric (MT) signals are often contaminated with noise from natural or man-made processes that may not fit a normal distribution or are highly correlated. This may lead to serious errors in computed MT transfer ...
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(1991)In the past decade, the isotopic compositions of C in > 600 inclusion-bearing diamonds have been determined. Such analyses have revealed the following isotopic characteristics: (1) peridotitic diamonds, which typically ...
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(2002)This report describes the application of electrospray ionization (ESI) mass spectrometry to the structural characterization of soil organic material, a critical component of environmental processes and the global carbon ...
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(1995)Laser ablation--inductively coupled plasma--mass spectrometry (LA--ICP--MS) has been assessed for use in the direct quantitative analysis of selected sulphide minerals. This paper details the use of chalcopyrite, galena, ...
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(2003)Derivation of Phanerozoic zircon 206Pb/238U ages by SHRIMP depends on calibration against an independently dated standard. The qualities of four different zircon standards (SL13, QGNG, AS3 and TEMORA 1) are assessed herein. ...
Now showing items 11634-11653 of 21768