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Now showing items 9969-9988 of 39409
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(1990)This paper attempts to fill the gap for some metasomatites from western Uzbekistan, where they accompany rare-metal mineralization. The ore field in which we worked consists of Carboniferous sedimentary and volcanosedimentary ...
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(1988)Dikes of ultrarare-metal microgranophyre similar to ongonite were recently detected in western Siberia. They are confined to a northeast-striking belt that cuts a hypabyssal granite pluton and is concordant with the dominant ...
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(1989)A lilac- to violet-colored mineral subsequently identified as rhodonite was found by I.B. Ivanova in a carbonate-manganese ores of the Polar Urals in 1985. The manganese show consisted of a lens within Riphaean ...
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(2002)The short-lived 182Hf-182W-isotope system is an ideal clock to trace core formation and accretion processes of planets. Planetary accretion and metal/silicate fractionation chronologies are calculated relative to the ...
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(2002)Recent diamond-anvil cell experiments are providing windows of unprecedented clarity on the interiors of the Earth, other planets, and their moons from high P-T studies of the materials that comprise these bodies. With ...
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(2001)In this paper, we present a class of solvers developed for the parallel solution of Richards' equation, a model used in variably saturated flow simulations. These solvers take advantage of the fast, robust convergence of ...
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(2003)Magmatic sulfide inclusions were found in early lamproite minerals from three localities: in olivine-1 of olivine hyalolamproite from Smoky Butte (Montana, USA), in olivine-1 of olivine orendite from Leucite Hills (Wyoming, ...
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(2004)Nickeloan tourmaline (up to 0.531 apfu Ni) associated with nickeloan talc (0.511‐0.582 apfu Ni) or chromian muscovite is developed in magnesite‐quartz veins hosted in ultramafic talc + magnesite ± hematite ± chromian ...
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(2003)The original description of nickelphosphide from the Butler meteorite [(Ni1.83Fe1.21)Σ3.04P0.96 to (Ni1.71Fe1.28Co0.01)Σ3.00P1.00] lacks detailed and accurate powder data - with only 11 observed reflections down to 1.37 ...
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(2016)This work presents the first results of an application of the Nightfire hotspot algorithm towards volcano activity detection. Nightfire algorithm have been developed to play along with a Suomi-NPP polar satellite launched ...
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(2004)Atmospheric cycling of nitric acid and other nitrogen-bearing compounds is an important biogeochemical process, with significant implications for ecosystems and human health. Volcanoes are rarely considered as part of the ...
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(2000)The heteronuclear gadolinium-copper complex was synthesized. Its crystal structure was determined by single-crystal diffraction. The crystal crystallizes in triclinic, space group P-1, a =0.8483(1) nm, b = 0.9642(2) nm, c ...
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(1994)Microdiamonds that occur in high-grade metamorphic rocks of the Kokchetav massif in Kazakhstan have been interpreted as part of the metamorphic mineral assemblage, implying previously unrecorded pressures for the metamorphism ...
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(1997)In order to document the isotopic composition of nitrogen in the convective mantle, we have analysed nitrogen isotopes together with argon isotopes in oceanic basalt glasses. Gases were extracted from fluid inclusions by ...
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(2002)Fines, microbreccias and agglutinates from the Luna 16 mature regolith 1635 and fines from the immature/submature Luna 24 regolith have been analysed for N and argon isotopes in order to understand the origin of isotopically ...
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(1999)The relationship between the nitrogen and carbon isotopic ratios of chlorophyll a and total biomass was explored in cultured marine phytoplankton to assess the utility of chlorophyll as an isotopic proxy for photoautotrophs. ...
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(1983)Total nitrogen, measured by neutron activation analysis, is highly enriched in residues from iron meteorites obtained by dissolution of the metal in dilute H2SO4, relative to the bulk value. On the average, the residues, ...
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(2003)Abundances and isotopic compositions of nitrogen and argon have been investigated in bulk samples as well as in acid-resistant C-rich residues of a suite of ureilites consisting of six monomict (Haverö, Kenna, Lahrauli, ...
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(2004)Large-scale outbreaks of defoliating insects are common in temperate forests. These outbreaks are thought to be responsible for substantial cycling of nitrogen (N), and its loss from the system. Gypsy moth (Lymantria dispar) ...
Now showing items 9969-9988 of 39409