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Browsing Геология России by Title
Now showing items 2955-2974 of 39126
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(1991)The recognition of a three-way correlation between magmatic SiO2 content, critical crystallinity, and the size (magnitude) of crystal fractionation-generated composition gaps in calc-alkaline magmatic systems suggests an ...
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(Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет», 2019)The article presents the results of a study of the composition of xenoliths of mantle peridotites (seven samples), collected from the Quaternary basalts of the Sverre volcano, the Svalbard archipelago. The presence of two ...
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(2002)In order to understand the role of aqueous fluid on the differentiation of the mantle, the compositions of aqueous fluids coexisting with mantle minerals were investigated in the system MgO-SiO2-H2O at pressures of 3 to ...
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(Федеральное государственное бюджетное образовательное учреждение высшего образования «Уральский государственный горный университет», 2017)This paper presents the first results of study of mineralogical, petrological and geochemical composition of volcanites from pre-Jurassic basement of the West-Siberian megabasin near the West-Tarkosalinsk oil and gas ...
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COMPOSITION OF HYDROCARBONS IN HYDROTHERMAL CARBONACEOUS MATERIAL AND THEIR GEOCHEMICAL SIGNIFICANCE (1989)Using indirect data and correcting for the presence of primary polynuclear aromatic hydrocarbons (PNA's) in minerals associated with diamond (olivine and pyrope) and of liquid hydrocarbons in melt inclusions from xenocrysts ...
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(1996)Compositions of the hydrous melts in equilibrium with garnet, omphacitic clinopyroxene and quartz have been investigated experimentally at 28.5 and 35 kbar. They are represented by silica-rich liquids (> 70% SiO2) with low ...
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(2001)Melt inclusions were examined in phenocrysts of basalt from the Akademiya Nauk caldera (Novogodnii Fissure, Karymskoe Lake) and andesite (1996 eruption) from Karymskii volcano. The inclusions were studied by homogenization, ...
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(2003)First evidence was obtained on the composition of melt and fluid inclusions in olivine phenocrysts from the trachybasalt of the southern Baikal volcanic region (eastern Tuva lava highland). Inclusions were studied by the ...
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(2003)The Dal’negorsk borosilicate deposit in Primorye is the typical economic-grade calcic-skarn boron deposit [1, 2]. The large-scale mineralization is restricted to the skarnized limestones of the Upper Triassic Tetyukha ...
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(PANGAEA, 1984-03-27)Structure and composition of sub-surface bottom sediments from the southwest Barents Sea have been under study. The study has revealed heterogeneity of sediment structure resulted from temporal irregularity and variability ...
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(PANGAEA, 1969-03-30)From results of analyses of sediment samples collected on a profile crossing the Kuril-Kamchatka Trench distribution of organic D, N. carbohydrates, lipids and humic substances was established, as well as nature of their ...
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COMPOSITION OF THE PLATINUM-GROUP MINERALS IN THE SALMON RIVER PLACER DEPOSIT, GOODNEWS BAY, ALASKA (2002)The composition and the associations of platinum-group minerals from the Salmon River placers, Goodnews Bay, Alaska, are compared with those of assemblages in other Alaskan-type complexes. Pt–Fe alloy, with an average value ...
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(1997)Bulk compositions and mineral analyses for forty-one, large, garnet- and spinel-facies peridotite xenoliths from the Udachnaya kimberlite in the central Siberian platform have many similarities to those of well-studied ...
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(1988)Geochemical study of plutonic xenoliths from different regions of the world not only allows the composition of the lithosphere there to be estimated, but also enables the evolution of the upper mantle during geologic time ...
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(2003)P-wave velocity (Vp), S-wave velocity (Vs), Poisson’s ratio (σ), heat flow, potential field, and surface geological data are integrated to constrain a model for the composition of the Uralide crust along the URSEIS transect. ...
Now showing items 2955-2974 of 39126