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Now showing items 5206-5225 of 39004
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(1990)The inverse problems of gravimetry and magnetometry have been examined in earlier papers for the case in which we have approximate measured values of some finite set of bounded linear functionals defined on the sources of ...
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(IOP Publishing, 2015)The article describes the data in exploration and local forecast of gold-ore deposits based on typomorphic pyrite properties. The pyrite properties: crystal shape, impurity-elements and thermal EMF change in relation to ...
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(1999)It has long been known that the measured kappa (232Th/238U, or κ) of mid-ocean ridge basalts (MORB) and, by inference, the upper mantle, is much lower than the time-integrated κ recorded by Pb isotope ratios (κPb). We ...
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(2002)The utility of hydrological models as a research tool is strongly linked to their ability to capture changes in regional hydrologic regimes in response to changes in climate forcing, or to simulate the hydrologic regimes ...
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(2003)Russian regional seismicity catalogs, including those in the annual “Earthquakes of the USSR,” are contaminated by industrial explosions. In northeastern Russia, explosions occur in tin, coal, and gold mines, as well as ...
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(2003)Recent seismological studies have presented evidence for the existence of a layer with ultra-low seismic velocities at the core–mantle boundary at ca. 2900 km depth. We report high-amplitude, high-frequency, and laterally ...
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(2004)The explosions of Karymsky volcano often produce signals containing a sequence of repeating pulses recorded on acoustic and seismic sensors, known as chugging. The amplitudes of these pulses correlate with the time interval ...
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(2004)Extensional cataclasites in the albitite-uranium deposits of the Ukrainian Shield are spatially and genetically related to sodium metasomatism. They formed within the long-lived Middle Proterozoic fault zones owing to fluid ...
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(2003)The objective of this study was to discern the source of higher than usual concentrations of chloride in drainage water collected from experimental forest plots after clear-cutting. When the sandbox experiments were initiated ...
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(2001)The compositionally typical H5 chondrite St-Robert has an exposure age, 7.8 Ma, indistinguishable from that of the main cluster of H chondrites. Small values of the cosmogenic 22Ne/21Ne ratio in interior samples imply a ...
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(2003)Exsolution and coarsening in Fe-free clinopyroxene of composition En45.1Di54.9 was studied at temperatures of 1300, 1200, and 1100°C, and annealing times between 10 min and 4320 h. Based on the wavelength of the exsolution ...
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(1993)Eclogite xenoliths from the mantle have experienced a wide variety of processes and P-T conditions, many of which are recorded in the mineral compositions and textures. Exsolution of garnet from clinopyroxene is one such ...
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(1997)To understand Cl dissolution in aluminosilicate liquids and the exsolution of Cl-rich magmatic volatile phases, experiments were conducted to determine the solubility of NaCl, KCl, and H2O in felsic liquids at 0.5 and 2 ...
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(1995)In oils and Precambrian- to Miocene-age source rocks from varying depositional environments, we have conclusively identified several novel 3-alkyl sterane and triaromatic steroid series, including (1) 3β-n-pentyl steranes, ...
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(2001)In this paper we demonstrate application of the Extended Self-Similarity (ESS) concept, recently developed in turbulence physics, for geological and geophysical phenomena. The theoretical background is discussed first and ...
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(2000)We have studied with an aspect-ratio four box the thermal–chemical convective evolution with strongly temperature- and depth-dependent viscosity and moving heat sources within the extended-Boussinesq framework, in which ...
Now showing items 5206-5225 of 39004