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Browsing ELibrary by Title
Now showing items 4715-4734 of 21768
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(2003)Gel permeation chromatography (GPC) was applied to concentrate steranes and triterpanes in oils and measure their compound-specific carbon isotope ratios (δ13C). Trace steranes and triterpanes were concentrated from ...
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(1998)Recent experimental and theoretical work has demonstrated that the dissolution rates of many aluminosilicate minerals are inversely proportional to the activity of aqueous Al3+. The consequences of these observations on ...
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(2000)Certain general indicators of the mechanical properties of rocks that are invariant under transformations of the coordinate system are suggested for use in quantitative studies of stress and strain in rock masses. A technique ...
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(2001)The dissolution mechanisms of multioxide silicate minerals and glasses differ from those of single (hydr)oxides because their dissolution may require the breaking of more than one metal-oxygen bond type. A general kinetic ...
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(1989)In this paper we present a mathematical model of a general mechanism of folding. We emphasize that in this formulation the nature of the forces producing the folding is immaterial. The rather general character of the model ...
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(2002)Horizontally layered (1D) earth models are often assumed as a model estimate for the interpretation of geophysical data measured along 2D geological structures. In this process, the individual data sets are usually inverted ...
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(2004)The paper is dedicated to two themes. The first (theme is the solution of the problem of filtering of data vector f δ The second theme is developing a principally new theory for regularization of linear algebraic equations ...
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(2004)In Parts land 2, the author of the present communication presented a linear integral presentation method, which is exceptionally important in gravimetry, magnetometry, and geodesy, and described the methods of its solution ...
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(2004)The present communication presents two basic methods of finding linear integral representations for the given data and shows that the main problem is obtaining an approximate solution of an LAES with symmetric positively ...
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(2004)The main concepts of the method of linear integral presentations that were suggested by this author in the mid-1990s are described in Part 1. However, at that time, and even in 1999-2001, the author did not notice a basically ...
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(2003)This paper focuses on heterogeneous soil conductivities and on the impact their resolution has on a solution of the piezometric head equation: owing to spatial variations of the conductivity, the flow properties at larger ...
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(2003)Simulations of water transport in soil are ubiquitous, and the Richards' equation introduced in 1931 is the main tool for that purpose. For experiments on water transport in soil horizontal columns, Richards' equation ...
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(2001)Multivariate data with spatial dependencies arise in many areas of application, including geology, precision agriculture, and ecology. For analysis of such data, a methodology based on a generalized shifted-factor model ...
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(2002)Experiments have been performed in the multicomponent (natural) bulk system to constrain the conditions of generation and differentiation of a K-rich group II kimberlite (now also referred to as orangeite). The group II ...
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(2003)Analysis of infrasonic pressure waves generated by active volcanoes is essential to the understanding of volcanic explosion dynamics. Unlike seismic waves propagating in the earth, infrasonic airwaves offer a relatively ...
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(1988)According to the meteoritic model of earth differentiation, liquid iron with carbon was generated in the initial period of differentiation. Thus, this event was close in time to the absolute age of the captive minerals of ...
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(2001)Some anomalous transient electric signals in the ULF band, the so-called SES, are claimed to be earthquake precursors. However, their origin remains widely unknown. Anomalous signals having the same characteristics as the ...
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(2004)To understand the fundamental chemical processes of fluid-rock interaction during the pulverization of quartz grains in fault zones, quartz grains were crushed within pure water. The crushing experiments were performed ...
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(2003)We show that partial melting of a preexisting mineral deposit during regional anatexis is likely to lead to incorporation of sulfide melt into silicate melt. Simple dissolution of metals in silicate melt during anatexis ...
Now showing items 4715-4734 of 21768