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Doklady Earth Sciences - Using satellite and reanalysis data, estimates of the significant relationship between the wildfire areas and associated pyrogenic emissions of combustion products with... 相似文献
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V. L. Tauson R. G. Kravtsova V. V. Akimov S. V. Lipko A. M. Spiridonov A. E. Budyak I. Yu. Voronova O. Yu. Belozerova K. Yu. Arsentev 《Doklady Earth Sciences》2018,478(1):92-99
Pyrite crystals and ore-bearing shales of the Degdekan deposit were studied by means of XPS, SEM–EDX, EPMA, and AAS. Five peaks of carbon organic forms were identified, conforming to polymer compounds containing either double bonds of carbon or alkyne groups and compounds containing C–OH and C=O bonds, as well as, probably, small amounts of S-containing compounds and those with functional groups of carboxylic acids. Sulfate prevails over sulfite in pyrites; among the surface sulfide forms, disulfide prevails over monosulfide; the presence of polysulfide is registered. The occurrence of various chemical forms of sulfur on the surface might provide for concentrating of microelements including the noble metals (NMs) in their surface-bound forms. The regular behavior of NMs (Au, Pt, Pd, and Ru) depending on the grain sizes (specific surfaces) of pyrite crystals along with the narrow range of the ratios of structural and surface components of the concentrations of different NMs points to NM coprecipitation with pyrite during the same productive stage. No capture of NM-containing carbonaceous phases took place, which should violate the regularity of Au distribution in pyrites of the Sukhoi Log deposit. 相似文献
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Voronova O. S. Zima A. L. Kladov V. L. Cherepanova E. V. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(9):1042-1052
Izvestiya, Atmospheric and Oceanic Physics - The results of satellite wildfire monitoring and estimates for the amounts of emissions of harmful gases and fine aerosols in Siberia from 2001 to 2019... 相似文献
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Doklady Earth Sciences - The features of anomalous Siberian wildfires in 2019 and trends of their changes during 2000–2019 are analyzed on the basis of satellite monitoring data. The average... 相似文献
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Bondur V. G. Tsidilina M. N. Gaponova E. V. Voronova O. S. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(12):1502-1519
Izvestiya, Atmospheric and Oceanic Physics - Results are presented from using satellite data to study anomalies of different geophysical fields due to the interaction of the lithosphere,... 相似文献
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V. L. Tauson D. N. Babkin T. M. Pastushkova N. V. Smagunov S. V. Lipko I. Yu. Voronova V. I. Men’shikov N. V. Bryanskii K. Yu. Arsent’ev 《Geochemistry International》2016,54(2):149-166
Distribution coefficients D of Au and Pd between magnetite (manganmagnetite) and ammonium chloride hydrothermal solution and the structural Dstr and surface-related Dsur terms of these coefficients were determined at 450 and 500°С and a pressure of 1 kbar using internal sampling techniques. Quantitative data on the speciation of precious metals are obtained using the technique of statistical selections of analytical data on single crystals SSADSC and compared with LA-ICP-MS data. Both Pd and Au are elements compatible with magnetite and its manganoan variety: Dstr is ≈3 for Pd and ≈1 for Au, although Au seems to weakly enrich fluid at 500°C: Dstr ≈ 0.5–0.8. The trends of postmagmatic Pd and Au fractionation can thus strongly depend on the presence of spinel-group minerals, first of all, magnetite and its solid solutions. The dualistic nature of the distribution coefficients provides sound grounds to believe that both elements are highly compatible, with regard not only for the structural but also for the surface-related modes of their occurrence (Dsur ≈ 17 and ≈50–70 for Au and Pd, respectively). The maximum concentrations of structural modes of the elements are 5.3 ppm for Au and 5.1 ppm for Pd and were found in the solid solution whose jacobsite mole fractions were 0.82 and 0.49, respectively. The principal distribution patterns of the elements in crystals are confirmed by LA-ICP-MS data. Data on this system testify that the distribution coefficients of minor and trace elements are geochemically dualistic because of the abnormal absorption properties of nanometer-sized nonautonomous phases on the surface of ore minerals, and this dualism plays an important geochemical role. 相似文献
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Bondur V. G. Voronova O. S. Cherepanova E. V. Tsidilina M. N. Zima A. L. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(12):1457-1469
Izvestiya, Atmospheric and Oceanic Physics - An analysis is performed of the annual and intraseasonal dynamics of wildfire areas and volumes of trace gas components (CO, CO2, CH4, NO, and NO2) and... 相似文献
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Bondur V. G. Tsidilina M. N. Gaponova E. V. Voronova O. S. 《Izvestiya Atmospheric and Oceanic Physics》2018,54(9):1172-1185
Izvestiya, Atmospheric and Oceanic Physics - The article describes the formation features of short- and mid-term strong (M ≥ 6) earthquake precursors detected from space. A database has been... 相似文献
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Doklady Earth Sciences - The multiannual variability of wildfire areas and volumes of emissions of carbon components (CO, CO2) and aerosol (PM2.5) caused by wildfires has been analyzed for the... 相似文献