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V. N. Aref’ev F. V. Kashin V. K. Semenov R. M. Akimenko N. E. Kamenogradskii N. I. Sizov V. P. Sinyakov L. B. Upenek V. P. Ustinov 《Izvestiya Atmospheric and Oceanic Physics》2006,42(6):739-751
Refined data of systematic measurements of total water vapor in the atmosphere from May 1980 to April 2005 are presented. The data were obtained at the Issyk Kul atmospheric-monitoring station by the method of solar molecular-absorption spectroscopy. Over 25 years, the annual mean water-vapor content in the atmosphere increased by 4.5% at a mean rate of increase of 0.18% per year. However, the water-vapor content decreased in the last five years. The results of statistical processing of experimental data (general statistical characteristics, correlation coefficients, composite oscillations) are described. A refined model is proposed for forecasts of temporal variations in the monthly mean and annual mean water-vapor contents for the coming years. The model includes a linear trend and the sum of oscillations with periods close to the periods of a number of well-known geophysical phenomena. Regression equations are proposed to relate the water-vapor content in the atmospheric column to the surface temperature and absolute humidity. 相似文献
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Petrov V. A. Lespinasse M. Poluektov V. V. Ustinov S. A. Minaev V. A. 《Geology of Ore Deposits》2019,61(4):293-305
Geology of Ore Deposits - This paper successively reports on a methodology for investigating the orientation and morphogenetic characteristics of fault systems at four scale levels: kilometers,... 相似文献
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V.?I.?KaftanEmail author V.?A.?Sidorov A.?V.?Ustinov 《Journal of Volcanology and Seismology》2017,11(3):217-224
This paper is concerned with an experiment that was intended to compare the respective accuracies of local GNSS monitoring using observations by GPS and GLONASS satellites at different elevations above the horizon. We used data from continuous daily observation sessions in a local network during 3 months in the “static” mode. An analysis of parameters that characterize the accuracy and efficiency of displacement determinations showed that the combined GPS + GLONASS data processing has the highest accuracy at elevation angles greater than 15°. It is shown that the accuracy of GLONASS observations is not considerably worse than that of GPS. We note that the time-dependent variation of GLONASS observation is large. 相似文献
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Doklady Earth Sciences - Research data on the content of radionuclides in the near-surface soil layer (up to 10-cm-thick) of the territory of New Moscow, which was a part of Moscow oblast until... 相似文献
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V.N. Ustinov A.K. Zagainyi C.B. Smith V.V. Ushkov E.E. Laz'ko L.I. Luk'yanova L.P. Lobkova 《Russian Geology and Geophysics》2009,50(9):739-750
Early Proterozoic kimberlites of Karelia are among the most ancient diamond-bearing primary source rocks in the world. They compose the large (2.0 × 0.8 km) Kimozero body localized in the predicted Zaonezhskoe kimberlite field. The established and assumed occurrences of kimberlite magmatism are located within the Karelian craton, which was stabilized during the Early Archean. They are confined to the central part of a large geophysical anomaly detected by gravity, magnetic, seismic, and heat-flow studies and mark a deep-seated magma chamber. Kimberlite bodies occur within structural blocks bounded by zones of plicative-rupture dislocations.The Kimozero kimberlites form an extensive but thin saucer-like body cut by narrow quasi-cylindrical feeders and dikes. It consists of metamorphosed kimberlites, their breccias and tuffs with widely varying amounts of mica. The body includes fragmentary fine-layered crater formations. The rocks contain olivine and phlogopite phenocrysts in an extremely altered groundmass of serpentine, chlorite, calcite, mica, and ore minerals as well as indicator minerals of kimberlites, such as Cr-spinel, manganiferous ilmenite, Cr-diopside, and rare pyrope. About 100 diamonds were extracted from 12 samples (total weight 815 kg). The crystals are colorless resorbed octahedra and, more seldom, combined octahedra-dodecahedra and spinel twins with abundant green spots caused by natural irradiation, which often make the whole crystal surface green. The diamonds contain inclusions of Mg-rich orthopyroxene and pentlandite suggestive of peridotitic lithospheric mantle derivation and dating of the sulfide inclusion implies a late Archean mantle source. By petrochemistry, the rocks are classified as kimberlites.The Kimozero kimberlites differ from classical Phanerozoic ones in having higher Fe contents, low contents of alkalies and P2O5, and intense superimposed carbonate, magnetite, and amphibole mineralization. The saucer-like bodies with narrow feeders without developed diatremes have no analogs in Russia but are similar to the saucer-like kimberlite bodies in Canada (Fort a la Corne), India (Tokapal), and Central Africa (Bakwanga) and the West Kimberley lamproites in Australia. By analogy with these bodies and on the basis of some common petrographic features (presence of pyroclastics and specific amoeba-like autoliths, scarcity of fragments of the enclosing rocks, local reworking of the deposited matter), the Kimozero kimberlites are considered to be the products of subaerial volcanic central-type eruptions. 相似文献
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I. A. Baksheev A. F. Chitalin V. O. Yapaskurt M. F. Vigasina I. A. Bryzgalov V. I. Ustinov 《Moscow University Geology Bulletin》2010,65(1):27-38
Three generations of tourmaline have been identified in propylite in the Vetka porphyry copper-molybdenum deposit of the Chukchi
Peninsula of Russia. Tourmaline-I is characterized by its Fetot/(Fetot + Mg) value, which ranges from 0.33 to 0.49. Tourmaline-II, which crystallizes at a lower temperature, overgrowing tourmaline-I
or occurring as isolated crystals, is distinguished by a higher Fetot/(Fetot + Mg), which varies from 0.46 to 0.72. The Fetot/(Fetot + Mg) ratio in tourmaline-III, which overgrows tourmaline-II is lower (0.35–0.49), and is identical to that of the first
tourmaline generation. This is probably caused by the beginning of sulfide deposition. Tourmalines in the deposit characterized
by complex isomorphic substitutions can be attributed to the intermediate members of the dravite—“hydroxy-uvite”-“oxy-uvite”
and schorl-“hydroxy-feruvite”-“oxy-feruvite” series. Tourmaline starts to crystallize at temperatures above 340°C. The fluid
responsible for the tourmaline deposition was magmatic, with a significant admixture of meteoric water (δ18OH
2O = −0.85 to −0.75‰). The high Fe3+/Fetot ratio (0.50) indicates high oxygen activity when the tourmaline precipitated. It has been established that the isomorphic
substitution Fetot → Al is typomorphic of tourmalines from porphyry copper deposits worldwide. 相似文献