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Browsing ELibrary by Title
Now showing items 4822-4841 of 21768
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(2003)This study investigated possible geochemical reactions during titration of a contaminated groundwater with a low pH but high concentrations of aluminum, calcium, magnesium, manganese, and trace contaminant metals/radionuclides ...
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(2001)Recent theories have proposed that life arose from primitive hydrothermal environments employing chemical reactions analogous to the reductive citrate cycle (RCC) as the primary pathway for carbon fixation. This chemistry ...
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(2004)We conducted a geochemical study of eclogites (40 samples) from a boudin of the Lower Unit of the Maksyutov Complex in the South Urals in order to determine their protolith nature. The eclogites have major element compositions ...
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(1990)The ternary diagrams of the composition of the ores presented shows the relationships among the chief metals in the ores of all the ore districts studied in the ocean by 1988. In contrast to the usual practice, the ...
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(2001)Zeolites are used in numerous agricultural, commercial, and environmental applications (e.g. as soil conditioners and fertilizers, and as adsorbents for ammonia, heavy metals, nuclear and organic wastes). It is important ...
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(2004)The paper describes a principle and algorithm proposed for the cluster analysis of the chemical compositions of rocks from magmatic complexes with the aim of identifying parameters of the spaceless and spatial geochemical ...
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(2006)В статье с использованием описанного ранее принципа и алгоритма кластерного анализа химических составов пород магматических комплексов разработана внепространственная и пространственная геохимическая структура Йоко-Довыренского ...
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(1999)The subject of this paper is the hydrochemistry of the mixing zone of the Yuriev River water (Paramushir I.) and sea water and the behavior of some trace elements in it. Extensive data of land and marine surveys are reported. ...
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(1999)Based on a large body of data collected during many years of monitoring the chemistry and evolution of the Verkhne-Yuriev Springs (Paramushir I.), it is shown that the chemistry of the Yuriev River water is controlled by ...
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(2001)A synthesis of empirical generalizations of natural observations and the simulation results of geochemical processes indicate that carbonate-rich alkaline waters develop in two successive stages. The preparatory stage ...
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(2003)Combined histological and geochemical analyses demonstrate complex processes leading to preservation of microbially altered bone. In certain situations, a chemical microenvironment distinct from surrounding pore waters is ...
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(2001)Techniques of geochemical thermometry with the use of the COMAGMAT computer program were utilized to assay the phase and chemical composition of the parental magma of the Talnakh intrusion and the melt–crystal mixtures ...
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(2000)The major and trace element and Pb–Sr–Nd isotopic compositions of Quaternary mafic lavas from the northern Ryukyu arc provide insights into the nature of the mantle wedge and its tectonic evolution. Beneath the volcanic ...
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(1988)The europium minimum often observed in Archean ultramafic and mafic rocks reflects both the effect of protomagmatic processes (fractional crystallization, accompanied by removal of feldspars and clinopyroxene from the ...
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(1999)Isotopic and geochemical data of the Zerenda series metamorphic rocks from the Kokchetav massif are reported. Some of these rocks contain microdiamond inclusions in garnets and other indicators of ultrahigh pressure ...
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(2003)Under consideration is the geological and geochemical signature of the granitoid rocks (from gabbro to leucogranite) making up a large Early Paleozoic batholith of the Kuznetsk Alatau. The early (progressive) stage of ...
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(2004)The composition of rock-forming minerals was analyzed and the crystallization conditions of phe-nocrysts were evaluated for the Paleozoic alkaline volcanic rocks from the Southern Ural, where these rocks are combined in ...
Now showing items 4822-4841 of 21768