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Now showing items 16637-16656 of 39124
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(2004)A collection of 55 samples of Yakutian kimberlites was studied using various methods (ICP-MS, XRF, determination of Pb, Nd, and Sr isotopic ratios, and others). According to indicative chemical parameters (TiO2-K2O, ...
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(1990)Time-dependent variations in the chemical and even isotopic compositions of natural hydrocarbon gases released into the atmosphere from mineral springs and out-gassing wells have been reported before. This effect is ...
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(2000)Two associations were revealed among the Northern group volcanoes in Kamchatka by study of chemical and isotopic composition of their lavas. The first association includes volcanoes located north of the Kamchatka River, ...
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(2001)We made a systematic examination into the effects of chemical treatments on Mg/Ca, Na/Ca, and Sr/Ca ratios of coral skeletons. Five skeletal samples were cut from modern and fossil corals of the genus Porites. Each sample ...
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(2001)Time-dependent variations in the physicochemical properties of pyrite were investigated in four sediment cores from the Black Sea. In the laminated, deep-basin sediments of Unit I and Unit II, >86% of pyrite particles are ...
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(2002)The production of 10Be in the Earth’s atmosphere depends on the galactic cosmic ray influx that, in turn, is affected by the solar surface magnetic activity and the geomagnetic dipole strength. Using the estimated changes ...
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(2004)Variations in the initial Sr-87/Sr-86 ratio in volcanic glasses from the upper part of the Late Pleistocene Dzhraber Extrusion are discussed. Samples of obsidian and perlite formed by autometamorphic hydration of the primary ...
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(2002)In the previous work (Mochalov et al., 2002), the "alluvial platinum" from the largest placers (Levtyrinyvayam River, Ledyanoi Creek, and Penistyi Creek) of the southern Koryak Highland was characterized. Alluvial platinum ...
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(PANGAEA, 2011-08-04)
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(2004)We investigate whether a component of the flow in the Earth's fluid core, namely torsional oscillations, could be detected in gravity field data at the surface and whether it could explain some of the observed time variations ...
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(1998)The first osmium isotope data are presented for marine sediments spanning the past 200,000 years (two full glacial cycles) and establish that there have been ocean-wide variations in sea-water osmium isotope composition ...
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(2001)The elements of many conodont taxa exhibit a polygonal surface micro-ornamentation. Four main types are recognized (striation, linear texture, regular (idiomorphic) texture and granular texture) and their distribution over ...
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(1987)The authors present their analysis of new strontium-isotope data on 88 volcanic rock samples from the KIA (Kurile Island Arc) and on 10 from the Ksudach volcano, southern Kamchatka. The strontium-isotope ratios were measured ...
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(2000)Variations in sediment input and distribution to the Laptev Sea continental margin during the Holocene and Termination I could be identified based on radiocarbon dated magnetic susceptibility logs and sediment thickness ...
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VARIATIONS OF SELF-POTENTIAL AND UNSATURATED WATER FLOW WITH TIME IN SANDY LOAM AND CLAY LOAM SOILS (2002)Accurate assessment of soil-water fluxes is essential in soil physics due to its direct implications in environmental, agronomical or hydrological applications. Field estimations of soil-water fluxes by 'classical' hydraulic ...
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(2004)In order to examine the variations of terrigenous detrital components in the core (97PC-19) sediments from the southern margin of the Ulleung Basin, we detail changes in grainsize composition and contents of major elements ...
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(2003)The Ca isotope variation of 11 Miocene and Pleistocene, authigenic, marine phosphates is rather small compared to the corresponding variation in δ18O values. The δ44Ca values are not correlated with the δ18O values and, ...
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(2001)The earthquakes of various magnitudes (M ≥ 7.0, 4.0 ≤ M < 7.0) for the period from 1977 to 1998 are considered. A different recurrence of the number of strong and weak earthquakes is revealed. Variations of sunspot numbers, ...
Now showing items 16637-16656 of 39124