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Browsing ELibrary by Title
Now showing items 2681-2700 of 20247
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(2004)D'Orbigny is the sixth and by far the largest angrite known. Its bulk chemical and mineral chemical compositions, rare gas abundances and oxygen and rare gas isotope compositions fit the compositional ranges known from ...
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(2004)Models of development of lattice preferred orientation (LPO) of crystals aggregates in convective flow are necessary to interpret the anisotropic seismic signature of the Earth's upper mantle. For that purpose we previously ...
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(1995)We report measurements of the equilibrium D/H fractionation factor (α) between methane and hydrogen in the temperature range 200-500°C. Isotopic equilibrium was achieved by recycling the gases over a Ni-Thoria catalyst, ...
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(1999)Immature source rock chips containing different types of kerogen (I, II, IIS, III) were artificially matured in isotopically distinct waters by hydrous pyrolysis and by pyrolysis in supercritical water. Converging isotopic ...
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(1999)Long-continued observations of water-level fluctuations and air pressure changes in the southern Baikal area were compared with the Baikal seismicity to reveal periods when the fluctuations had much greater amplitudes prior ...
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(2001)The family Loeblichiidae Cummings already emended by Rauser-Chernousova et al. (1996), is revised and subdivided into three subfamilies: Loeblichiinae Cummings emend., Spinoendothyrinae subfam. nov., Dainellinae subfam. ...
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(1988)Seismologists usually describe the change in the amplitude of seismic waves with distance R in terms of a power equation such as A =B/Rn. This equation is often used to analyze experimental results on underground explosions. ...
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(2003)A petrographic and scanning electron microscopic study of the four CO3 chondrites Kainsaz, Ornans, Lancé, and Warrenton reveals for the first time that dark inclusions (DIs) occur in all the meteorites. DIs are mostly ...
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(2002)Mokoia is a CV3 chondrite that contains abundant phyllosilicate mineralization. We present a detailed petrographic and scanning electron microscopic study of 24 dark inclusions (DIs) that we found in Mokoia. The overall ...
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(2002)Inverse theory concerns the problem of making inferences about physical systems from indirect noisy measurements. Information about the errors in the observations is essential to solve any inverse problem, otherwise it is ...
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(2000)The standard chemical potentials μso of aqueous solutes over a wide range of temperatures and pressures are needed to calculate phase and chemical equilibria in hydrothermal systems. The standard derivative thermodynamic ...
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(2000)We present a summary of the methodology for probabilistic fault displacement hazard and discuss the types of data needed for the analysis. The methodology is based on the widely used formulation for probabilistic assessment ...
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(1997)A data processing and storage system for records of wave disturbances in the atmosphere generated by volcanic eruptions is described. The system was developed using acoustic signals recorded during eruptions of Kamchatkan ...
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(2000)Alteration of submarine basalts compromises geochronology using conventional K/Ar and 40Ar/39Ar techniques. To help overcome these problems, we re-evaluated the potential of groundmass dating techniques. Incremental heating ...
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(2003)The long-term rate of racemization for amino acids preserved in fossil ostracode shells was determined by using independently dated sediment cores from five deep lakes. The racemization rates for aspartic and glutamic acids ...
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(2003)Dating of metamorphic processes is difficult due to genetic heterogeneity of metamorphic rock. Problem of dating is often connected with long and multistage proceeding of metamorphism. Time of process is determined by ...
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(2004)This work is an attempt to determine the real time of formation of coastal-marine placers based on the modeling of placer-forming processes, present-day rates of lithodynamic processes, and recent parameters of placer ...
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(2003)Garnet peridotites from the Kokchetav ultrahigh-pressure (UHP) massif contain abundant volatile and high field strength element (HFSE) bearing minerals, such as Ti-clinohumite and zircon. These characteristics are interpreted ...
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(2001)Dating sediment burial over million-year time scales is crucial in many areas of the Earth sciences and archeology, but is often difficult using traditional techniques. Sediment burial can be dated by the radioactive decay ...
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(1986)This paper is a review of well-documented geochronological and related isotopic evidence for the age and total crustal residence time of the oldest known terrestrial rocks, mainly using Rb/1bSr, Sm/1bNd and U/1bPb decay ...
Now showing items 2681-2700 of 20247