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Browsing ELibrary by Title
Now showing items 1600-1619 of 24764
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(2005)Several hypotheses have been proposed to explain trench-parallel shear wave splitting in the mantle wedge of subduction zones. These include 3-D flow effects, parallel melt filled cracks, and B-type olivine fabric. We ...
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(2002)Diffusion of Ba in natural sanidine and plagioclase has been characterized under dry 1 atm conditions. Polished or cleaved sections of the feldspars were surrounded by source powders in Pt capsules and annealed in air. ...
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(2002)At convergent margins, fluid flux through active mud volcanoes (MVs) has been estimated to exceed that of the frontal accretionary prism, and may have done so in earlier earth history. Often, however, it is largely unknown ...
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(2005)Geomorphologic, marine geological, and paleoclimatic evidence, along with modeling results, indicate that, during the Late Pleistocene, the Sea of Okhotsk was glaciated by a "back-arc" marine ice-sheet, which was a continuous ...
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(2004)We investigated the H6-chondrite Yamato 75267, in which a fusion crust cuts a shock melt vein. The shock vein region, more than 280 μm from the fusion crust, contains high-pressure phases, such as ringwoodite, majorite-pyropess ...
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(2004)The deformation of the eastern Asian lithosphere during the first part of the India-Asia collision was dominated by subduction-related extension interacting with far effects of the collision. In order to investigate the ...
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(2004)Measurements of space-time distributions of the background emissions in the frequency range 0.5-5 Hz and their seasonal and diurnal variations are presented. The analysis of impedance ratio determines the presence of high ...
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(2002)Numerous analog models and some natural examples display smoothly curving backlimb fold hinges over sharp, angular bends in the underlying thrust surface. We present a new kinematic model that can reproduce this geometry ...
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BACKSCATTERED 39AR LOSS IN FINE-GRAINED MINERALS: IMPLICATIONS FOR 40AR/39AR GEOCHRONOLOGY OF CLAY (2000)The interpretation of 39Ar recoil loss from clay minerals during application of the 40Ar/39Ar analytical technique is controversial. To further explore the mechanism for 39Ar recoil loss, we quantified the effects of ...
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(2000)The publication of Backscattered Scanning Electron Microscopy and Image Analysis of Sediments and Sedimentary Rocks marks a significant point in the history of sedimentary petrology. The evolution of the scanning electron ...
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(1987)Initial studies of the ability of silicate bacteria to break down smectite minerals used four smectite specimens from the Askani clay deposit, Georgia. They were subjected to quantitative chemical, as well as by X-ray and ...
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(1999)Transmission electron microscopic (TEM) analyses of freshwater biofilms and bacterial cells, grown in experimental culture, have shown that these microorganisms are commonly associated with fine-grained (Fe, Al)-silicates ...
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(1999)Mobilization of contaminant Pb and other cations from a weathered andesite was examined by conducting water-rock leaching experiments to measure release rates of the major and minor elements found in the bulk rock. Experiments ...
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(1996)Polonium has been observed as the sole α-emitting nuclide in groundwaters of central Florida, in the absence of its radiogenic parents, at levels of 1,000 dpm/l or more. Because of the chemical similarity of Po to S (both ...
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(1999)The study of the fossilization processes of modern cyanobacteria provides insights needed to recognize bacterial microfossils. The fossilization of cyanobacteria is discussed and images of recent and fossil bacteria and ...
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(1996)It is well known that many microorganisms can reduce the highly toxic soluble selenium oxyanions (selenate and selenite) to a much less toxic insoluble form, namely elemental selenium. We are developing a bacterial treatment ...
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(2006)We report here the petrography, mineralogy and in-situ trace-element mineral geochemistry of a rare and hitherto unidentified baddeleyite-apatite-spinel-phlogopite (BASP) rock in Late Neoproterozoic Achankovil Shear Zone ...
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(1990)In an area of the Eastern Aldan region, on the periphery of a large body of rocks of the ultramafic-alkalic carbonatite (UAC) association, in the middle of a formation of carbonate (dolomitic) rocks of Vendian to Early ...
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(1983)The comparison of geological and geophysical data from the Kenya and Baikal rift zones permits us to consider the formation of these zones to be associated with the development of wide asthenospheric upwellings beneath ...
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(2002)The basic stratigraphic domains of the Late Precambrian in Siberia are the Uchur-Yudoma, Baikal-Lena, and Priyenisel-Angara structure-facies areas (SFA) of the periphery of the old Siberian Platform. Correlation of local ...
Now showing items 1600-1619 of 24764