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Browsing ELibrary by Title
Now showing items 5034-5053 of 20315
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(2001)Convergent margin processes play an important role in the distribution of terrestrial volatile species. During subduction processes volatiles are filtered from the subducting package and are restricted to return to the ...
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GLOBAL-SCALE INTERACTIONS BETWEEN THE SOLID EARTH AND ITS FLUID ENVELOPES AT THE SEASONAL TIME SCALE (1999)Changes in the mass distribution inside the surface fluid envelopes in response to climate changes affect the Earth by changing its gravitational field, its rotation and the position of its centre of mass. At subdecadal ...
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(1999)A new genus and species Cretasalia tsybini (Gobiatidae, Anura) from the Late Cretaceous (Campanian-Maastrichtian) locality Khermeen-Tsav (South Gobi Region, Mongolia) is described from a skull and part of the skeleton. ...
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(1999)A new genus Gobicar with a single species, G. ponomarenkoi from the Shar-Teg locality is described. A combination of its characters indicates that it is the most primitive member of the Eccoptarthridae.
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(2002)GOCE (gravity field and steady-state ocean circulation explorer) will provide a global model of the Earth's gravity field with high spatial resolution and high accuracy. The gravity measurements are derived from a combination ...
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(2004)Pedogenic goethites in each of two Early Permian paleosols appear to record mixing of two isotopically distinct CO2 components—atmospheric CO2 and CO2 from in situ oxidation of organic matter. The δ13C values measured for ...
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(1988)We experimentally investigated the process of gold precipitation on arsenopyrite - its kinetics and temperature dependence, S/As ratio and grain size. To clarify the role of arsenic, we studied its precipitation in the ...
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(2003)World gold production increased during the last century by more than five times, from approximately 500 to 2544 t in 2000. The shares of gold-only and complex gold-bearing deposits in these values are almost equal. The ...
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(1996)The interaction of gold hydroxo-chloro complexes with iron oxides (ferrihydrites, goethites) during coprecipitation experiments is investigated. Chemical analyses of solids and solutions are coupled with a detailed ...
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(2004)The Uzelginsk deposit in the southern Urals, in Russia, is an example of a weakly altered classical massive sulfide deposit of the Uralian type. Pyritic Cu-Zn ore contains gold in two main modes: so-called "invisible" gold ...
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(1997)Gold and silver accompany the base-metal mineralization developed in the mantle magnesian basalts erupted during the great Tolbachik fissure eruptions of 1975-1976 and the arsenic-antimony-mercury minerals deposited in ...
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(1988)We investigated the gold distribution in reindeer moss growing over gold fields and shows of the gold-quartz and gold-sulfide associations. The gold in the plant ash was determined by means of a spectroscope with a detection ...
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(2001)New data are presented on the gold content of the eruptive and posteruptive exhalations of highly varying temperatures. Deposits that accumulated around fumarole vents show gold concentrations ranging from 0.05 to 2800 ppm ...
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(1988)Humus acids, including humic (HA) and fulvic (FA), are constant components of organic matter (OM) in continental and marine sediments. This paper reports on a study to clarify the relationship between gold and HA in marine ...
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(1990)The area of andesite belts in the Urals is east of the Ural paleo-oceanic region. It has already been established that complexes of different age in this area coincide in space, and that each of them includes specific ore ...
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(1999)On the basis of the multistage model of pyrite formation at low and elevated temperatures, three types of sediments were synthesized: hydrotroilite, dehydrated hydrotroilite, and pyrite. Their sorption capacity with respect ...
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GOLD IN PYRITE FORMATION PROCESSES: 2. PROTON MAGNETIC RESONANCE IN SYNTHETIC GOLD-BEARING PYRITES (2001)Proton magnetic resonance (1H NMR) was used to study synthetic gold-bearing and gold-free iron sulfides, hydrotroilite and pyrite prepared by reacting iron(III) oxide with hydrogen sulfide in a neutral aqueous solution. ...
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(2001)A Mössbauer spectroscopic (MS) study of synthetic gold-bearing iron sulfides (hydrotroilite and pyrite) prepared by reacting iron(III) hydroxide with hydrogen sulfide in neutral aqueous solutions is reported. It is shown ...
Now showing items 5034-5053 of 20315