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Browsing Геология России by Title
Now showing items 3625-3644 of 39126
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(2003)The article presents fossilized plant remains from the Uzon caldera in Kamchatka for the first time. A problematic plant remain from diatomite, undetermined plant bulbs and several pieces of silicified herbs and wood as ...
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(2003)Densities of ultramafic melts were determined up to 22 GPa by relative buoyancy experiments. Olivine and diamond were used as buoyancy markers. We confirmed that the density crossover of PHN 1611 melt and its equilibrium ...
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(2003)The origin and evolution of cratonic roots has been debated for many years. Precambrian cratons are underlain by cold lithospheric roots that are chemically depleted. Thermal and petrologic data indicate that Archean roots ...
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(2002)Lake Teletskoye occupies a narrow graben located in the northwestern sector of the Altai fold belt in South Siberia. The lake basin is thought to have formed during the Pleistocene as a distant result of the Cenozoic ...
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(2005)Locally diffusive, radiative heat transport inside the earth is represented by an effective thermal conductivity (krad,dif), calculated from spectra. Previous geophysical models assumed that emissivity (ξ) equals unity, ...
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(1995)The carbon isotopic composition of the marine diatom Phaeodactylum tricornutum (δ13Cp) was measured over a series of growth rates (μ) in a continuous culture system in which both δ13CCO2 and [CO2]aq were determined. In ...
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(2003)The authors' data and materials published in the literature were used to obtain analytical approximations for the boundaries of the stability fields of monosulfide solid solution (mss), pentlandite solid solution (pn), ...
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(1999)The decay rate of 7Be depends on the electron density at the nucleus and therefore may vary with the chemical environments of the Be atom. Using a 100% efficiency high-purity germanium detector, the decay constants of 7Be ...
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(2010)n this study, we present Lu–Hf isotope systematics and Lu and Hf abundances for komatiites from the lowermost part of the 2.8 Ga Kostomuksha greenstone belt in the Baltic Shield and compare these, as well as available Sm–Nd ...
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(Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения Российской академии наук, 2017)
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(2004)On the base of geochemical investigation of the main volcanites of Kunashir, Iturup and Paramushir islands (the three largest of the Kuril chain) it was attempted to estimate the respective roles of subduction and nonsubduction ...
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(2000)The variable salinity of fluid venting from mid-ocean ridges is indicative of mixing between hydrothermal seawater and fluids that have undergone supercritical phase separation. In order to study the stability of a ...
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(2006)The precipitation of gold in response to changes in various intensive and extensive parameters of a hydrothermal system may be an effective means of gold ore deposition but sorption processes may also provide an exceedingly ...
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DEPOSITIONAL AND TECTONIC FRAMEWORK OF THE RIFT BASINS OF LAKE BAIKAL FROM MULTICHANNEL SEISMIC DATA (1992)Recent multichannel seismic reflection data from Lake Baikal, located in a large, active, continental rift in central Asia, image three major stratigraphic units totaling 3.5 to 7.5 km thick in four subbasins. A major ...
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(2003)The Middle Volgian Kashpir Oil Shales Formation, located on the Russian Platform, is a lateral equivalent of the North Sea and West Siberian petroleum source rocks. In the Volga Basin, this formation is 6 m thick and shows ...
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(PANGAEA, 1999-01-26)The Holocene depositional setting of the Laptev Sea was studied using three marine sediment cores from water depths between 77 and 46 m. Based on sedimentary parameters (TOC content, delta13Corg, sedimentation rates) ...
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(2001)Multi-stage development of carbonate buildups has been recognised in the Bol'shaya Nadota Carbonate Complex, in the vicinity of the town of Inta (Subpolar Urals). The growth of typical stromatoporoid-coral bioherms, ...
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(Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет», 2017)goldquartz deposits defines metallogenic profile of the province and presence of numerous rich placers. Deposits are attributed to frontal, middle and near-bottom parts of the ore pipe. Frontal part of the ore pipe contains ...
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(2003)Origin, growth, and steady existence of monodisperse silica spheres (MSS) composing precious opal are possible solely in concentrated alkaline solutions of silica. In Australian deserts, such solutions result from dissolution ...
Now showing items 3625-3644 of 39126