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Browsing ELibrary by Title
Now showing items 3099-3118 of 21934
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(1999)We report here direct ion microprobe dating of fossil tooth (dentine) of a Permian fresh-water shark, Orthacanthus senckenbergianus using the SHRIMP instrument recently installed at Hiroshima University. Fifteen spots on ...
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(2004)Here, we present a new technique for the direct measurement of Ca/Ca isotope ratios on a Multicollector Inductively Coupled Plasma Mass Spectrometer (MC–ICP–MS, AXIOM) using the ‘‘cool plasma’’ technique. By reducing the ...
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(2003)Temporally and spatially averaged models of bedload transport are inadequate to describe the highly variable nature of particle motion at low transport stages. The primary sources of this variability are the resisting ...
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(2002)Particulate matter plays an important role in the removal of metal ions from water in natural aquifers. Some of the most important of these materials consist of associations of inorganic particles (clay minerals, oxides) ...
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(2000)Although recent thermodynamic models predict a low-temperature miscibility gap in the pyrope-almandine-grossular garnet solid-solution series, coexistence of two immiscible garnets consistent with the calculated miscibility ...
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(2000)X-ray-absorption near-edge structure (XANES) was successfully applied for the direct determination of Ce valence in hydrogenetic ferromanganese nodules (two samples) and crust (one sample). Rare earth element (REE) patterns ...
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(2000)Previous studies have indicated that hydrous ferric oxide precipitates, formed and aged at low temperatures, exhibit solubility products of the form K*S0 = [Fe3+][H+]-m, where m < 3 ([ ] # free ion concentration). Although ...
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(1996)The availability of a synthetic multilayer crystal and accurately calibrated oxide and silicate standards make it possible to use the electron microprobe for precise a analysis of spinel. A requirement of the a measurement ...
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(2005)This paper is devoted to the study of the radon emanation coefficient vs. water mass fraction for mineral samples. Modeling is performed considering only the direct recoil phenomena and assuming planar pores with high ...
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(2001)Sequential simulation of a continuous variable usually requires its transformation into a binary or a Gaussian variable, giving rise to the classical algorithms of sequential indicator simulation or sequential Gaussian ...
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(1998)The pattern of the 1956 eruption at Bezymyannyi that is universally recognized now is in conflict with observational data. Analysis of these data shows that there was no supersonic 30-km movement of large volumes of resurgent ...
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(2002)We present a modeling study to investigate the ability of directional induction logging to evaluate magnetic properties of formations. Simultaneous measurement of in-phase and quadrature components of electromotive force, ...
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(2004)We study the directional variation in travel-time residuals using 13,820 P-wave arrivals from 1,998 teleseismic events (15 D 98, 4.1 mb 7.3) recorded in 1991-1997 by the Kyrgyz Digital Seismic Network (KNET). Based on a ...
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(2004)An extensive palaeomagnetic study was carried out on an approximately 250 Ma old reversed to normal transition of the Earth’s magnetic field (EMF) recorded in 86 volcanic lava flows of the Siberian trap basalts, North ...
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(2001)Atmospheric dust is an important feedback in the climate system, potentially affecting the radiative balance and chemical composition of the atmosphere and providing nutrients to terrestrial and marine ecosystems. Yet the ...
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(2002)Examines the phenomenon of dissolution in the formation of the crystal faces of the minerals. Evidence of the etching of the crystal; Problems with the phenomenon; Examples of interrupted growth in tourmaline indicating ...
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(1989)Quantization of structure and abrupt discontinuity of natural processes typical in nature. This property has long been known and has been formulated as law of dialectical materialism, which states that quantitative ...
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(2002)Presents an abstract of the article 'Discovering New Minerals in the Comfort of Your Home,' by J.A. Mandarino presented at the 28th Rochester Mineralogical Symposium.
Now showing items 3099-3118 of 21934