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Browsing ELibrary by Title
Now showing items 13460-13479 of 22187
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(2003)In the framework of a series of methodological studies to test the reliability of the reconstruction of the electron density distribution (EDD) by the maximum entropy method (MEM), we have attempted to check the possibilities ...
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(2001)Topological groundwater hydrodynamics is an emerging subdiscipline in the mechanics of fluids in porous media whose objective is to investigate the invariant geometric properties of subsurface flow and transport processes. ...
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(1999)We have determined the three-dimensional form of leucosome in two migmatites produced by syntectonic anatexis of different protoliths: (1) stromatic migmatite derived from pelite, which comprises sheets of leucosome ...
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(2003)The distribution of bonds associated with the M2 sites in various well-ordered pyroxene minerals is determined using a topological analysis of electron density in the manner proposed by Bader (1998). Each M2 atom is bonded ...
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(1999)Because of a recent increase in interest in the properties of the calcite surface, there has also been an increase in activity toward development of mathematical models to describe calcite's surface behaviour, particularly ...
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(2004)Although glass corrosion resistance has been tested with laboratory methods for decades, investigators are now just beginning to understand the reaction phenomena at or close to saturation with respect to the rate-limiting ...
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(2003)The present paper is a report of work completed by the group 'Friends of Paleobiogeography' on the principles of palaeobiogeographic classification and nomenclature of palaeobiogeographic units (biochoremas). These principles ...
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(2001)Recent studies of the palaeomagnetic field behaviour over the past 5 Myr rely on statistical analysis of mainly directional data. However, the data are quite sparse and ill-distributed, and directional parameters are ...
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(1996)Using relative paleointensity estimates derived from twelve globally distributed pelagic sediment cores, we assess whether they record a signal consistent with that expected from a dominant geocentric axial dipole. The ...
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(2003)Siderite (FeCO3), rhodochrosite (MnCO3), and vivianite ([Fe3(PO4)2] · 8 H2O) are well-known authigenic minerals in a number of sedimentary settings. Here, we explore the potential of low-temperature mineral magnetic ...
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(1995)Ion microprobe measurements of REE (rare earth element) and other selected trace and minor element concentrations were made in clinopyroxene, olivine, feldspar, and chlorapatite in Chassigny and the three nakhlites (Nakhla, ...
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(1995)The carbonaceous chondrite Acfer 182 contains Ca,Al-rich inclusions (CAIs) that differ from most CAIs in other meteorites. Many of them contain grossite (CaAl4O7), whose modal abundance exceeds 30 vol % in most of these ...
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(2002)¶Silicates intergrown with diamonds from 10 diamondites (polycrystalline diamonds, framesites) have been analysed for trace element contents by laser ablation ICP-MS. The diamondites are fine- (< 100 µm) to coarse-grained ...
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(1991)Ureilites including ALHA77257, ALH82130, PCA82506, Kenna, and Novo Urei were analyzed using neutron activation analysis for Ca, Sc, Cr, Mn, Fe, Co, Ni, Zn, Ga, REE, W, Re, Os, Ir, and Au. Bulk and acid-treated samples were ...
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(1998)Liquid immiscibility is an important magmatic process that causes unmixing of magmas into liquids of contrasting compositions. Such magmas may get modified by simultaneous wall rock assimilation and fractional crystallization ...
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(1997)The Kamchatka arc (Russia) is located in the northwestern Pacific Ocean and is divided into three segments by major sub-latitudinal fault zones (crustal discontinuities). The southern (SS) and central (CS) segments are ...
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(2006)A phase of Mesozoic extension associated with the termination of continental collision at the southern margin of the Aldan Shield produced ultrabasic lamproites in a discontinuous belt 500 km long and ~150 km wide. The ...
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(1996)Chemical evaluation of fluids affected during progressive water-sediment interactions provides critical information regarding the role of slab dehydration and/or crustal recycling in subduction zones. To place some constraints ...
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(1999)Peridotite xenoliths from the Bereya alkali picrite tuff in the Vitim volcanic province of Transbaikalia consist of garnet lherzolite, garnet-spinel lherzolite and spinel lherzolite varieties. The volcanism is related to ...
Now showing items 13460-13479 of 22187