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Now showing items 15785-15804 of 39126
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(2002)The values of pK1 + pK2 for the dissociation of carbonic acid have been determined in seawater as a function of temperature (0 to 45°C) and salinity (5 to 42). They were determined by the addition of NaHCO3 to seawater ...
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(2003)We have studied the geologotectonic and petrochemical peculiarities of the occurrences of subalkaline ultrabasic lavas of the northern Siberian Platform. The constructed petrochemical diagrams evidence the existence of ...
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(1996)The shear viscosities of forty melts in the system Na2O-Al2O3-SiO2-P2O5 have been determined in the temperature range 1652-1052oC using the concentric cylinder method. Six P-free compositions containing ~67 mol% SiO2 varying ...
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(1995)Thermal conductivity and thermal diffusivity were determined simultaneously on collections of granites and amphibolites by means of a finite pulse length method. The measurements were performed at pressures up to 500 MPa ...
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(2003)The Vendian–Cambrian boundary is one of the most important geological milestones in the Earth’s evolution. It is suggested that the short-living Pannotia supercontinent was breaking out at that time as a result of vigorous ...
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(2004)A large gap is documented in the Patom Upland, at the base of the Zherba Formation. The closely connected Tirbes Formation is now considered as its completing member. The Tinnaya Formation is separated from the Zherba and ...
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(1986)In Siberia Vendian is equated with a Yudoma Complex or Yudomian. Yudomian deposits of the Siberian Platform and adjacent geosynclines differ greatly in facies and thickness. According to the composition and structure of ...
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(2003)This paper is based on the results of the work done during a long period of time in the framework of the International Project "Atlas of Lithopaleographic, Structural and Geoecological Maps of Central Eurasia''. Having ...
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(Федеральное государственное автономное образовательное учреждение высшего образования «Московский физико-технический институт (национальный исследовательский университет)», 2005)A novel dynamical approach to solve the problem of global dynamics of the Earth is put forward. The goal of the theory is to obtain the time dependant solution of the moment of inertia or the potential (kinetic) energy of ...
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(2001)The low-temperature viscosities of dry and hydrous X (X=Li, Na, K, Ca0.5, Mg0.5)AlSi3O8 melts have been investigated. The samples were hydrated via piston cylinder synthesis, and the water contents were subsequently ...
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(2001)The 1-atm viscosities of hydrated synthetic iron-free phonolite and trachyte melts are reported between 108.4 and 1013.1 Pa s for water contents between 0 and 5 wt.%. These show a very strong reduction with increasing water ...
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(2005)The visible and infrared spectral properties of two natural jarosite minerals and a suite of synthetic jarosites and alunite samples are described here. The fundamental stretching and bending vibrations observed in the ...
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THE VISIBLE DIFFUSE REFLECTANCE SPECTRUM IN RELATION TO THE COLOR AND CRYSTAL PROPERTIES OF HEMATITE (2003)Hematite (α-Fe2O3) possesses distinct spectral properties which facilitate its identification in mineral mixtures. This paper reports the relationships between the visible diffuse reflectance (DR) spectrum and the color ...
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(2003)Explosive volcanic eruptions are the result of intensive magma and rock fragmentation, and they produce volcanic ash, which consists of fragments <2 mm in average diameter. The problem with volcanic ash is that its formation ...
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(2018-12)Annually, from 3 to 6 Kamchatkan volcanoes produce eruptions, during which the explosions eject ash to 10-15 km a.s.l., and ash clouds spread thousands of kilometers from volcanoes. Ash clouds pose a serious threat to the ...
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The VolSatView information system for monitoring and study Kamchatkan and Northern Kuriles volcanoes (IVS FEB RAS, 2018-08)
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(Springer, 2016)Kamchatka and the Kuril Islands are home to 36 active volcanoes with yearly explosive eruptions that eject ash to heights of 8 to 15 km above sea level, posing hazards to jet planes. In order to reduce the risk of planes ...
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(1988)Calculation of the volume and composition of magma generated by lithospheric extension requires an accurate mitial geotherm, and knowledge of the variation and composition of the melt fraction as a function of pressure and ...
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(1996)Research was carried out into the water and carbon dioxide regime during the charnockitization of gneissic complexes. It was shown that CO2 plays a considerable role in the dehydration of metapelites and biotite-bearing ...
Now showing items 15785-15804 of 39126