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Browsing ELibrary by Title
Now showing items 5065-5084 of 21934
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(2004)An issue that often arises in such GIS applications as digital elevation modeling (DEM) is how to create a continuous surface using a limited number of point observations. In hydrological applications, such as estimating ...
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(2003)Automatic methods used in geosciences to interpolate between orientation data have often limited applicability and strength, in particular where large ranges of orientations occur. In this paper, we show that geostatistical ...
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(2004)This paper introduces geostatistical approaches (i.e., kriging estimation and simulation) for a group of non-Gaussian random fields that are power algebraic transformations of Gaussian and lognormal random fields. These ...
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(1995)Heating ortho-undecyltoluene with an acidic clay catalyst and hexamethylbenzene as a methylating agent resulted in the formation of hydrocarbon mixtures containing undecyltoluenes and dimethylundecylbenzenes. At short ...
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(2004)There are more and more prerequisites for the fundamental theoretical synthesis of new concepts concerning the anthropogenic transformation of our planet. One can recognize three most important groups of factors among these ...
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(2004)The geological position and structure of the large uranium-bearing Novoukrainsk ore field, confined to the Novoukrainsk granitic massif in the central part of the Ukrainian Shield, is reviewed. It is shown that the ...
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(1999)The bulk of the Kamchatkan hydrothermal manifestations and all high-temperature hydrothermal systems are located in three volcanic belts: the East Kamchatka, South Kamchatka, and Sredinnyi Ridge volcanic zones. The fact ...
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(1985)Geophysical data indicate that beneath Late Cenozoic continental rift zones there are asthenospheric upwellings with their upper surfaces reaching the Moho at depths of 30–40 km. Under neighboring stable regions the ...
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(2003)A new investigation of the thermal conductivity of the drill cores from the research drill hole Nördlingen 1973 in the Ries impact structure was conducted. The 1206 m deep drill hole penetrated 331 m of post-impact lake ...
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(2003)There are two well-founded hypotheses of the Ninety-East and Chagos-Laccadive Ridges genesis: the hypothesis of the extrusive source disposed at a junction of the spreading axis with transform fault and the hot spot ...
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(1987)A comparison of the probability density distribution of the heat flux with the distribution of dimensions of blocks shows that the two are qualitatively identical. Two characteristic peaks are identified on these distributions: ...
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(1985)Tectonic, magmatic and metamorphic processes combine into endogenous regimes. There is direct correlation between the degree of excitation of endogenous regimes and observed heat flow. There are grounds to suppose that all ...
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(1990)Experiments were carried out on primitive natural lherzolitic compositions from 10 to 60 kb and 900 to 1400-degrees-C. Mineral compositions were reversed by using mixes of finely ground (< 20-mu-m) minerals from natural ...
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(1990)On the basis of experiments presented in Part I of this series, most of the published thermobarometers relevant to four-phase peridotites are tested here for their ability to reproduce experimental conditions. They were ...
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(2004)Geothermometry of eclogites and other high pressure (HP)/ultrahigh-pressure (UHP) rocks has been a challenge, due to severe problems related to the reliability of the garnet–clinopyroxene Fe–Mg exchange thermometer to ...
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(2001)A simple extension of geothermobarometric technique is developed, from the usual case of assumed equilibrium among all minerals, to layered coronas with gradients of chemical potential. For reactions among end-members in ...
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(1982)The reaction Hb+Zo(Ep)+H2O+CO2⇌Pl+ Chl+Cc+Q was studied under hydrothermal conditions at P total=2, 4, 6 and 8 kb at Xco2=0.1. The continious transition from tremolite (actinolite) to Al-rich hornblende was fixed along the ...
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(1997)By using ICP-MS, we have measured the concentrations and isotopic abundances of Ge in the following samples: (1) the iron meteorites Camp Verde, Toluca, Picacho, and Canyon Diablo; (2) Canyon Diablo spheroids; and (3) oxide ...
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(2006)A new technique for the precise and accurate determination of Ge stable isotope compositions has been developed and applied to silicate rocks and biogenic opal. The analyses were performed using a continuous flow hydride ...
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(2001)Earth, Venus, and Mars all exhibit populations of giant (radiating, linear, and arcuate) mafic dike swarms hundreds to >2000 km in length. On Earth the dikes are exposed by erosion, while on Venus and Mars their presence ...
Now showing items 5065-5084 of 21934