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Browsing ELibrary by Title
Now showing items 5380-5399 of 21821
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(2005)The high sensitivity of the satellite-transition (ST) MAS NMR technique was exploited to obtain high-resolution 17O MAS NMR spectra of the three polymorphs of Mg2SiO4: forsterite (α-Mg2SiO4), wadsleyite (β-Mg2SiO4), and ...
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(2004)A number of different geodynamic models have been proposed to explain the early tectonic evolution of the Baltic Shield. To provide additional geophysical constraints on these models, we performed a teleseismic tomography ...
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(2003)Assessment of contributions from shallow lithosphere to teleseismic wave front distortion is a prerequisite for high-resolution regional teleseismic tomography. Several methods have been proposed in the past for the ...
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(2002)Palaeotemperature sensitive series from tree-rings, ice cores, corals and documentary sources are combined to producepalaeo summer-temperaturereconstructions (AD 1970-1761)and geographical eigenvector (EOF) maps in both ...
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(2004)Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show ...
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(2002)Oscillatory zoning in plagioclase is investigated at small scale (≤10 µm) using accumulated backscattered electron (BSE) images as high-resolution imaging method. Combined with electron microprobe quantitative analysis, ...
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(2004)Another BDP drilling experiment was carried out in the winter of 1999 at 52degrees05'23"N-105degrees50'24" E, under 201 in of water, on the slope of the Posol'sk Bank, a submerged bottom rise in South Baikal. The -350 m ...
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(1999)Cathodoluminescence (CL) investigations of igneous, metamorphic and sedimentary feldspars indicate that rare earth elements (REE)-activated CL in feldspars is more common than previously assumed. Hot-cathode CL microscopy ...
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(2001)We have analyzed 214 fossil apatite samples from nine stratigraphic sections worldwide that cover the lower Cambrian to lower Ordovician for their strontium isotope ratios. Of these samples, 180 from six sections that cover ...
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(2003)Pre-Quaternary terrestrial climate records in which time has been calibrated using astronomical cycles are, with the exception of lacustrine proxies, poorly represented in the geological record. This omission is a significant ...
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(2000)The results of a new technique for the measurement of the thickness distribution of fundamental particles are reported. The technique is based on high-resolution transmission electron microscopy (HRTEM) of Na-saturated ...
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(2001)High-resolution X-ray Absorption Near-Edge Structure (XANES) spectra of iron allow to take into account the effects of the coordination numbers on the quantification of redox values. Volcanic glasses show split pre-edge ...
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(2005)We present the first high-resolution carbon isotope and carbonate content profiles generated through the thickness of enamel from a steer fed C3- then C4-dominant food. Carbonate contents decrease by ~2 wt% from the enamel ...
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(1999)The viability of oxygen isotope analysis of tooth enamel by UV laser ablation and fluorination has been demonstrated by comparison with the Ag3PO4 extraction method. In-situ analyses by UV laser fluorination using both ...
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(2001)Water solubility in hydrocarbon systems is of great interest for deep oil fields. A new autoclave has been designed to measure phase equilibria in water-hydrocarbon systems up to 400°C and 1.5 kbar. It has been applied for ...
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(2005)A new technique has been developed for the determination of the oxygen isotope composition from biogenic silica. The iHTR method (inductive high temperature carbon reduction) is based on the reduction of silica by carbon ...
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(2001)High-temperature creep behavior in Ni2GeO4 spinel was investigated using synthetic polycrystalline aggregates with average grain sizes ranging from submicron to 7.4 microns. Cylindrical samples were deformed at constant ...
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(2003)Single crystal X-ray structure data have been obtained for wairakite (Wairakei, New Zealand), Ca0.95Na0.06[Al1.96Si4.04O12].2H(2)O, at temperatures of 20degreesC, 170degreesC, 210degreesC, 400degreesC, and 600degreesC. ...
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(1997)One-atmosphere density measurements at very high temperatures have been performed on four mantle melts in the FeO-Fe2O3-CaO-MgO-Al2O3-SiO2 system (FeO-rich peridotite, PHN 1611, komatiite, and fayalite), using the Ir-based ...
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(2002)A series of heating stage experiments, at ambient atmosphere and high temperature, were conducted in order to detail the change in the homogenization temperature and the behavior of H2O of melt inclusions in olivine ...
Now showing items 5380-5399 of 21821