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Browsing ELibrary by Title
Now showing items 5361-5380 of 21936
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(2003)Phase relations and stability of a mixed-chain (21)-hydrous clinopyribole [(21)-MHP] were investigated using a multi-anvil apparatus in the P-T range 5-18 GPa and 1100-1600 °C in a simpli-fied KNCMASH-system. (21)-MHP is ...
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(2003)The first cold plasma ICP-MS (inductively coupled plasma mass spectrometer) Fe isotope study is described. Application of this technique to the analyses of Fe isotopes in a number of meteorites is also reported. The ...
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(1999)We present the analytical methods that have been developed for the first high-precision Fe isotope analyses that clearly identify naturally-occurring, mass-dependent isotope fractionation. A double-spike approach is used, ...
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(1996)We have determined liquid metal-liquid silicate partition coefficients for Ni, Co, Mo, W, P, Ga, and Ge at 10 GPa and 2000°C in a multi-anvil apparatus. Our sample containers were either MgO or Al2O3. The two different ...
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(1998)Using plane wave pseudopotential method within the local density approximation (LDA), we calculate single-crystal elastic constants (cij) of orthorhombic MgSiO3 perovskite, generally accepted to be the major component of ...
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(1999)In order to test the effect of very high pressures on the siderophile behaviour of two elements, Ni and Co, we have carried out diamond anvil cell experiments on Ni- and Co-bearing systems, up to 70 GPa. Observation of ...
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(1991)Synthetic spinel harzburgite and lherzolite assemblages were equilibrated between 1040 and 1300° C and 0.3 to 2.7 GPa, under controlled oxygen fugacity (f O2). f O2 was buffered with conventional and open double-capsule ...
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(2001)Fluids and melts have been trapped and analysed in high pressure experiments in the model mantle system MgO-SiO2-H2O at 6 to 10.5 GPa and 900 to 1,200 °C. The fluid/melt traps consisted of a diamond layer that was added ...
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(2003)We propose and demonstrate an approach involving use of C18 solid phase disk extraction coupled with high resolution mass spectrometry for obtaining non-invasive molecular level information on dissolved organic matter (DOM) ...
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(1996)We report high-resolution single-zircon UPb age data for Middle Triassic volcaniclastic intercalations in biostratigraphically calibrated pelagic successions of the Southern Alps. The results require a redefinition of the ...
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(1999)The stability relations of phase egg, AlSiO3(OH), have been investigated at pressures from 7 to 20 GPa, and temperatures from 900 to 1700 °C in a multi-anvil apparatus. At the lower pressures phase egg breaks down according ...
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(1988)Data on the absolute magnitude of the second derivatives of the gravitational potential can be obtained only with gravity variometers. But a measurement accuracy of a fraction of an eotvos can be attained only in the dynamic ...
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(2004)Study of a Holocene fan delta in Adventfjorden, Spitsbergen, provides new insight into the nature of high-arctic coastal sedimentation and deglaciation dynamics. The fjord-side, gravelly Gilbert-type fan delta began to ...
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(1987)A description is given of the compositions of high-chromium spinellid varieties from the Ural and Altai-Sayan basalts. These spinellids belong to the following rock associations: trachybasalt (tb), trachybasalt-trachyandesite ...
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(1999)We analyze 243 three-component broadband digital seismograms of aftershocks from the Ms. = 7.3 Suusamyr, Kyrgyzstan, earthquake to determine seismic attenuation in the northern Tien Shan. Pg, Sg, and SmS body waves and S ...
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(2004)Study of the Khitoostrov, Varatsk, and other corundum occurrences in kyanite-garnet-biotite plagiogneisses of the Chupa section (Belomorian Mobile Belt) has revealed their association with products of low-alkaline Ca-Na ...
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(2004)In the Okhotsk massif specified are two groups of sub-volcanic alkaline rocks (K-picrites and alkaline basaltoids) with separated areas, differing in composition, ratio of mineral phases, petrostructural characteristics. ...
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(1989)That pre-Paleozoic volcanic rocks occur widely in the Polar Urals has been known for a long time. High-magnesium andesites and boninites of the Polar Urals resemble in their geological position, as well as their petrography ...
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(2001)An approximate expression of the eikonal equation and the polarization vector may be obtained in weakly anisotropic media from first-order perturbation theory. The advantage of this approximation for qP wave is that the ...
Now showing items 5361-5380 of 21936