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Browsing Геология России by Title
Now showing items 2435-2454 of 39195
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(1997)Reaction rates of congruent and incongruent dissolution of sanidine in NaHCO3 solution (0.1 m) and albite in KHCO3 solution (0.1 m) as well as the reaction rates of precipitation of secondary minerals (analcime and sanidine) ...
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(1984)The Pauzhetka geothermal system is located in a volcano-tectonic depression near the active volcano Kambalny. Temperatures at depths of 300–800 m are 180°–210°C. The exploitation of productive horizons with a withdrawal ...
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(1989)The authors showed earlier that on fusion of aegirine NaFeSi2O6 and kirschsteinite CaFeSiO4, the coordination numbers of Fe2+ and Fe3+ ions occupying octahedral positions in the crystals decrease to 4 and that these ions ...
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CHANGE IN VALENCE AND LATTICE ENVIRONMENT OF FE IONS DURING THE MELTING OF KIRCHSTEINITE (CAFESIO4) (1989)It is important to know the valence state and structure of iron ions in magmatic melts in order to understand the reactions controlling the redox environment of petrogenesis. The voluminous literature on Moessbauer ...
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(2004)A mechanism of electric-photochemistry channel of seismo-ionospheric coupling is investigated. In particular, the penetration of electric field from the lithospheric source into the ionosphere and effect of this field on ...
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(2001)The benthic foraminiferal record of two sediment cores at 900 and 2500 m water depth in the marginal Arctic Ocean reflects fluctuations in paleoproductivity, ice sheet extent, and Atlantic water inflow. Highest paleoproductivity ...
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(2004)The purpose of this study was to investigate the impact of redox-induced changes in the organization of the clay fraction of a bulk vertisol using transmission electron microscopy. Chemical and X-ray powder diffraction ...
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(IOP Publishing, 2016)The article provides an analysis of specific features in changes of rocks in the oil water contact zone. The object of study is the formation YU[1] {3-4} (J[3]o[1]) of Klyuchevskaya oil deposit (West Siberian oil-gas ...
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(1989)Experimental studies of crack generation in rocks by recording of the acoustic and electromagnetic pulses emitted by defects have established general patterns of change in the amplitude and frequency spectra of such acoustic ...
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(2003)The flow pattern and sediment character of laboratory density currents partly blocked by bed topography is used to demonstrate how changes in paleocurrent direction through a turbidite at a single site can be explained. ...
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(2001)Rock magnetic investigations of archaeological materials of burnt clay from Eneolithic ovens (~4500 years BC) showed particular changes with time in the magnetic mineralogy of samples, stored under normal conditions. Our ...
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(2001)The widespread presence of methylmercury (MeHg) in the environment and the potential toxicity and bioaccumulation in the food chain has stimulated a demand for accurate and sensitive methods for the determination of mercury ...
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(1992)A global shift in carbonate carbon δ13C-values from heavier values in the Maastrichtian to lighter values in the early Danian indicates recycling of isotopically light organic carbon to inorganic carbon reservoirs during ...
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(2003)Mesoproterozoic marine successions worldwide record a shift in average delta(13)C values from 0 to +3.5parts per thousand, with the latter value evident in successions younger than 1250 Ma. New carbon isotope data from the ...
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(2003)The transition from the Early Miocene to the Middle Miocene is a crucial point for the development of mollusc faunas (gastropods and bivalves) in the Central Paratethys. Here, we first discuss the confusing and partly ...
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(Днепропетровский национальный университет им. Олеся Гончара, 2019)In the central part of the Volyn Upland, the Pryluky palaeosol unit have been studied in nine loess-soil sites (Boremel 1 3, Novyi Tik, Smykiv, Shybyn, Kolodezhi, Kovban, Novostav). Several sections were excavated along a ...
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(2002)Submicron magnetite crystals with mean sizes of 0.037, 0.10 and 0.22 μm undergo major changes in hysteresis properties and domain states in crossing the Verwey transition (TV~120 K). The 0.037 μm crystals are single-domain ...
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CHANGES IN SHEAR-WAVE POLARIZATION IN THE CRUST OF KAMCHATKA BASED ON RECORDS OF LOCAL EARTHQUAKES (1999)The idea of using anisotropic parameters to study earthquake precursory processes relies on the results of theoretical research into the behavior of porous cracked media under stress. These results show that all media ...
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(2004)Closely spaced sequences of accelerator mass spectrometer (AMS) 14C dates of peat deposits display century-scale wiggles which can be fitted to the radiocarbon calibration curve. By wiggle-matching such sequences, ...
Now showing items 2435-2454 of 39195