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Browsing ELibrary by Title
Now showing items 4224-4243 of 21934
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(1996)A new method for modeling fractional crystallization processes that involve olivine (ol), plagioclase (plag) and augite (aug) is presented. This crystallization assemblage is the major control on the chemical variations ...
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(2003)Results of thermal convection experiments in a rotating fluid with a geometry similar to the Earth's core tangent cylinder are presented. We find four different states. In order of increasing Rayleigh number, these are: ...
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(2002)Simple experiments have been conducted to study the strain evolution in lava dome cross sections. A viscous fluid is injected vertically from a reservoir into a feeding conduit. Silicone putty is used as analogue magma. ...
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(2003)Large ocean island volcanoes frequently develop productive rift zones located close to unstable flanks and sites of older major sector collapses. Flank deformation is often caused by slip along a decollement within or ...
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(1997)Pyrolysis experiments were conducted on immature petroleum source rocks under various conditions to evaluate the role of water in petroleum formation. At temperatures less than 330°C for 72 h, the thermal decomposition of ...
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(1990)In contrast to classical wide-angle deep seismic profiling (WDSP) using two ships, in the single-ship version (WDSP-1) the ship tows at least two detector streamers, one in the near zone (NZ) and the other in the far zone ...
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(2002)We present centrifuge experiments to study the surface deformation induced by shallow pluton emplacement in a rheologically stratified crust. Sand simulates the topmost brittle crust; plastilina and denser silicone represent ...
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(2003)The global-scale empirical dependence between cumulative frequency and size of volcanic eruptions (VEs) [1] is explained in this work. This frequency is proportional to the volume of erupted ash to a power of 0.7. It is ...
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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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(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 ...
Now showing items 4224-4243 of 21934