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Browsing Геология России by Title
Now showing items 8343-8362 of 39375
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(1999)Pyrope-grossular solid solutions, (Mg,Ca) 3 Al 2 Si 3 O 12 , of composition Py 85 Gr 25 and Py 75 Gr 25 were synthesized at 1000, 1200, and 1400 degrees C and 30 kbars in a piston-cylinder device. The synthetic garnets ...
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(2000)Small scale structures produced by deformation and compaction are common in igneous, metamorphic, and sedimentary rocks, and are often used to define foliation and lineation directions. Analytic solutions for models of ...
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(1998)At any set of thermodynamic conditions a mineral will have some well defined equilibrium crystal structure. However, this structure can be locally disturbed by crystal defects, such as domain walls or solute atoms. This ...
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(PANGAEA, 1995-02-26)
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(2002)Trend analysis is widely used for detecting changes in hydrological data. Parametric methods for this employ pre-specified models and associated tests to assess significance, whereas non-parametric methods generally apply ...
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(2002)The substitution in layered double hydroxide-like phases (LDH) of composition (Co2+1-y Cu2+y)2Al3+(OH)6Cl · n H2O (0 y 1) was studied by X-ray diffraction and X-ray absorption spectroscopy. It was found that the lamellar ...
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(1989)The special features of this investigation are as follows: 1) we use readily accessible data; 2) the prediction is truly local, and the locations of the fields are determined within about 75 km; 3) the effectiveness of the ...
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(1990)The prediction of petroleum and natural gas fields (especially very large ones) is a very interesting scientific problem and a highly important economic tasks. Other publications by the present writers using examples from ...
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(2004)Pyrope-knorringite garnets, Mg3(Al1-X Cr3+X)2Si3O12 with X=0.25, 0.50, and 1.00, were synthesized between 9 and 16 GPa and 1300 and 1600 °C, using multianvil high-pressure techniques. The garnets with X=0.25 and 0.50 are ...
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(Dalnauka, 2014)Local Spatial Data Infrastructure (LSDI) of the Institute of Volcanology and Seismology (IVS) FEB RAS was created in 2010 and has been developing since that time. The LSDI is aimed at providing free access to the distributed ...
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(1997)Stratigraphic investigations of the Precambrian in Karelia and the Kola Peninsula, which are the type area for the pre-Riphean part of the Proterozoic of northern Eurasia, demonstrate a priority of local stratigraphic ...
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(2001)Recent seismological observations reveal the presence of seismic anisotropy in localized regions at the base of the mantle within an otherwise isotropic lower mantle. These regions can be placed in a tectonic context, ...
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(2001)The incorporation of hydrogen (deuterium) into the coesite structure was investigated at pressures from 3.1 to 7.5 GPa and temperatures of 700, 800, and 1100 °C. Hydrogen could only be incorporated into the coesite structure ...
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(1999)The use of a direct crystallographic technique is reported for locating Cr atomic sites in a mullite containing 11.5 wt% Cr 2 O 3 by monitoring variations in characteristic X-ray emission rates as a function of fast electron ...
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(1998)The loess/paleosol sequences of Central Asia are continuous terrestrial records of the Quaternary period and enable detailed comparison with paleoclimatic archives such as marine and ice core records in order to reconstruct ...
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(1999)Loess rocks are widespread on the Earth. They occupy about 10% of global land area. Their thickness reaches up to 300 m in places and even more. Loess rocks differ in the different parts of the Earth. The 'warm' and the ...
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(1988)According to the Second Law of Thermodynamics, 'natural processes tend from less probable to more probable states,' and we use the entropy of a system as a measure of the thermodynamic probability P of its state. For this ...
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(2003)A paradox of volcanology is that the most fundamental part of its knowledge – the observation of volcanic processes and objects – is less strict and less well organized compared with experimental and theoretical approaches ...
Now showing items 8343-8362 of 39375