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Browsing Геология России by Title
Now showing items 6720-6739 of 39126
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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 ...
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(2019)Subvolcanic environments in supra‐subduction zones are renowned for hosting epithermal deposits that often contain electrum and native gold, including bonanza examples. This study examined mineral assemblages ...
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(2001)The heat capacity of end-member titanite and (CaTiSiO5) glass has been measured in the range 328–938 K using differential scanning calorimetry. The data show a weak λ-shaped anomaly at 483 ± 5 K, presumably associated with ...
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(2003)The prediction of viscosity in silicate melts, over the range of conditions found in nature, remains one of the most challenging and elusive goals in Earth Sciences. We present a strategy for fitting non-Arrhenian models ...
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(1999)Raman spectra of fluids of the CO2-CH4-H2O systems contained in synthetic fluid inclusions have been obtained above the homogenization temperature to 500°C. Spectra of the CO2 and CH4 gases do not vary along the portion ...
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(2001)Torsional forced-oscillation and microcreep methods have been employed in a study of the viscoelastic behaviour of fine-grained polycrystalline olivine at high temperatures (to 1300 °C), seismic frequencies and low strain ...
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(2003)Structural investigations at high temperature were carried out on natural columbite samples across the join Fe(Nb0.95Ta0.05)2O6-Mn(Nb0.95Ta0.05)2O6. The samples were preliminarily annealed to attain the complete cation-ordered ...
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(2002)The optical spectra of dravite (tourmaline) with an unusually high ratio of Fe3+ to Fe2+ and a synthetic elbaite with high Fe3+ content were studied at high temperature (297 to 600 K) and high pressure (to 10.51 GPa) ...
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(1989)The boundary dated at 200 to 1800 m.y. marks an event that is of fundamental importance in the Earth's history and separates the early stages of planetary evolution from the Neogaean with its present type of geodynamics. ...
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HIGH-YIELD LITHIUM SEPARATION AND THE PRECISE ISOTOPIC ANALYSIS FOR NATURAL ROCK AND AQUEOUS SAMPLES (1998)A high-yield lithium separation technique for rock and aqueous samples has been established together with precise Li isotope analysis by thermal ionization mass spectrometry. Four separate stages of ion-exchange chromatography ...
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(2000)Tri- and tetraunsaturated highly branched isoprenoid (HBI) alkenes are widespread sedimentary geochemicals but few have been isolated from sediments in sufficient quantities for rigorous identification. However, two C25 ...
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(2016)Terrestrial magmatism is dominated by basaltic compositions. This definition encompasses mid-ocean ridge basalts (MORB), which account for more than eighty percent of Earth’s volcanic products and which are formed at ...
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(2006)Osmium, Ru, Ir, Pt, Pd and Re abundances and 187Os/188Os data on peridotites were determined using improved analytical techniques in order to precisely constrain the highly siderophile element (HSE) composition of fertile ...
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(2005)New analyses of highly siderophile elements (HSE; Re, Os, Ir, Ru, Pt, and Pd) obtained by Carius tube digestion isotope dilution inductively coupled plasma mass-spectrometry (ID-ICPMS) technique are reported for 187Os-enriched ...
Now showing items 6720-6739 of 39126