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Browsing ELibrary by Title
Now showing items 5680-5699 of 21768
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(1996)The formation of clathrates in fluid inclusions during microthermometric measurements is typical for most natural fluid systems which include a mixture of H2O, gases, and electrolytes. A general model is proposed which ...
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(2003)Resolution is key to confidently identifying unique geologic features using ground-penetrating radar (GPR) data. Source wavelet ''ringing'' (related to bandwidth) in a GPR section limits resolution because of wavelet ...
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(2002)Typical isochron calculations involve using a least squares analysis of the data. If the scatter about a line through the data is perfectly Gaussian, then least squares provides an optimal handling of the data. However, ...
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IMPROVING NOBLE GAS BASED PALEOCLIMATE RECONSTRUCTION AND GROUNDWATER DATING USING 20NE/22NE RATIOS (2003)The interpretation of noble gas concentrations in groundwater with respect to recharge temperature and fractionated excess gas leads to different results on paleo-climatic conditions and on residence times depending on the ...
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(2004)Most methods for deriving Q from surface-seismic data depend on the spectral content of the reflection. The spectrum of the reflected wave may be affected by the presence of thin beds in the formation, which makes Q estimates ...
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(2000)Monitoring the Comprehensive Nuclear-Test-Ban Treaty will require improved seismic location capability for small-magnitude events. The International Monitoring System (IMS) is well suited to locate events that are large ...
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(2002)This paper examines several techniques that have the potential to improve the quality of slug test analysis. These techniques are applicable in the range from low hydraulic conductivities with overdamped responses to high ...
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(2003)It is hypothesized that the unit impulse response of a linearized kinematic diffusion (KD) model is a probability distribution suitable for frequency analysis of hydrologic samples with zero values. Such samples may include ...
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(1999)This paper reports measurements of geomagnetic variations at a geodynamic test site in Crimea using fast optically pumped Sx-magnetometers in the summer seasons of 1981-1983. It shows possibilities for short-term earthquake ...
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(2002)Atomistic computer simulation methods have been used to model the nature of nonstoichiometry and impurity defects in the bulk and at the (1014) surface of dolomite (MgCa(CO3)2). Calcium and Mg in the bulk and at the surface ...
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(2003)The Volgian Stage was a subdivision used in Russian and world geological literature for over a century. The stage was withdrawn from the general scale and replaced by the Tithonian Stage, when the Interdepartmental ...
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(2000)This paper presents combined 39Ar-40Ar and K-Ca analyses on gem quality, K-rich silicates: a muscovite and a sanidine, both from pegmatites. We attempted to directly determine the 40K branching ratio by comparing the ...
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(1986)Refined estimates of primitive upper-mantle (PUM) composition are derived here from the major-element and rare-earth-element (REE) contents of mantle lherzolites, using the approaches pioneered by Loubet et al. (1975) and ...
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(2003)The short-lived 98Tc-98Ru (Half-life between 4 and ~10 Ma) and 99Tc-99Ru (Half-life 0.21 Ma) decay systems have the potential to provide important information on the relative chronology of processes that affected metal ...
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(2001)The depletion of moderately volatile elements in planetesimals and planets is generally considered to be a result of removal of hot nebula gases. This theory can be tested with Sr isotopes. The calculated initial 87Sr/86Sr ...
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(2000)The dissolution-reprecipitation reaction of phosgenite (Pb2Cl2CO3) to cerussite (PbCO3) has been observed in situ in a fluid cell of an atomic force microscope (AFM). The (001) face of phosgenite, in contact with static ...
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(2000)Microbial oxidation of Mn(II) and subsequent precipitation of insoluble, reactive Mn(IV) oxides are primary sources of these solid phases in the environment and key controls on Mn cycling in natural waters. We have performed ...
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(2003)We present an in situ evaluation of the response of seafloor sediments to passive dynamic loads. Horizontal-to-vertical (H/V) spectral ratios are used to characterize local sediment response, and ID wave propagation modeling ...
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(2001)We present the first investigation of in situ high-pressure and high-temperature bubble growth in silicic melts. In a hydrothermal diamond-anvil cell, a haplogranite melt (79 wt% SiO2) is hydrated then subjected to cooling ...
Now showing items 5680-5699 of 21768