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Browsing ELibrary by Title
Now showing items 1518-1537 of 21253
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(2004)The concentrations of B, F, and other "crustal" elements (Li, Sn, Rb, and Cs) in some mantle-derived rocks from the Pamirs and Tien Shan are higher than in the Earth's crust. In the mantle F is largely related to K being ...
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(1997)Experiments at 750 °C, 200 MPa(H2O), a (H2O)=1, and fO2 - Ni-NiO established that the equilibrium among tourmaline, biotite, cordierite, and melt (± spinel, aluminosilicate, or corundum) occurs with ∼2 wt% B2O3 in strongly ...
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(2001)Experiments were performed to measure the isotopic fractionation of boron between illite/smectite (I/S) clay minerals and water as a function of temperature (300° and 350°C) and degree of illitization. Corresponding changes ...
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(2005)Boron isotope composition of marine carbonates has been proposed as a paleo-pH proxy and potential tool to reconstruct atmospheric pCO2. The precise knowledge of the boron isotopic composition of ancient seawater represents ...
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(1996)The 11B10B ratios of thirty-two meteorite falls and nine lunar rocks were measured as Cs2BO+2 using thermal ionization mass-spectrometry. The11B10B ratios of meteorites vary from 4.011 to 4.098, i.e., their δ11B values ...
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(1997)Negative thermal ionization mass spectrometry (NTIMS) is an effective and robust analytical method which allows to analyze the boron isotopic composition (δ11B) of natural waters directly with an analytical uncertainty of ...
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(1999)Many arc lavas contain material derived from subducted oceanic crust and sediments, but it remains unresolved whether this distinctive geochemical signature is transferred from the subducting slab by aqueous fluids, silicate ...
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(2005)Boron isotopic fractionation during adsorption onto Ca-flocculated Aldrich humic acid (HA) has been investigated experimentally as a function of solution pH at 25°C and I = 0.15 M. Boron aqueous concentration and isotopic ...
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(1997)We have determined the boron content and isotopic composition of bulk carbonates and associated pore waters from Ocean Drilling Program Site 851. The δ11B of the carbonates range from 23%% to as low as -5.5%%, greatly ...
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(2000)Synchrotron radiation B K-edge XANES spectra are reported for 19 borate and borosilicate minerals. The spectra are characterized by three prominent features; a sharp peak (A) at ~194 eV (the edge feature of trigonal B; ...
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(2001)Synchrotron radiation boron K-edge XANES spectra collected in fluorescence yield mode are reported for monoclinic metaboric acid [HBO2(II)], sinhalite (MgAlBO4), and a selection of boron oxides in which B is exclusively ...
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(1998)Large submarine mud volcanoes in the abyssal part of the Black Sea south of the Crimean Peninsula are similar in many respects to synsedimentary mud volcanoes in the Mesoproterozoic Belt-Purcell basin. One of the Belt-Purcell ...
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(2003)Quaternary sedimentation in the northwestern Sea of Okhotsk, where tidal and thermohaline currents are active, was studied using 8443 km of high-resolution air gun profiles from four cruises. It is characterized by: (1) ...
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(1996)Hydrothermal water enters Frolikha Bay, a well-known site of high geothermal heat flux in the northern part of Lake Baikal, at 400 m depth. On the basis of CTD profiles, the hydrothermal water is identified as forming an ...
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(2004)Lithologic-facies and ecologic-taphonomic methods are jointly used to study the Lower-Upper Permian boundary deposits of a complex structure, which are represented by laterally variable marine, coastal, deltaic, lagoonal, ...
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(2005)This paper presents the results of the paleomagnetic and magnetic mineralogical studies carried out along the sequence of the recently discovered oldest Nedubrovo (Early Triassic) rocks of the Moscow Syneclise, exposed in ...
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(2004)Robust magnetotelluric response function estimators are now in standard use in electromagnetic induction research. Properly devised and applied, these have the ability to reduce the influence of unusual data (outliers) in ...
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(1995)Constraints on steady state flow strengths of multiphase aggregates can be obtained by the bounds calculated using the assumption of uniform stress and uniform strain rate within the aggregate. This study shows that such ...
Now showing items 1518-1537 of 21253