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Now showing items 1926-1945 of 41957
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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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(Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования «Петрозаводский государственный университет», 2014)Приводятся данные по экономической оценке комплексного Ba-Sr-P-Ti-TR-полевошпатового сырья Элисенваарского дифференцированного щелочного комплекса в северо-западном Приладожье (Карелия), содержанию и распределению в породах ...
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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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(Федеральное государственное бюджетное образовательное учреждение высшего образования «Мурманский государственный технический университет», 2020)The average background concentrations of 42 elements, including heavy metals which are the most dangerous pollutants of the environment, were calculated based on detailed research of sediments of 15 small lakes in the south ...
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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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(PANGAEA, 1995-10-22)
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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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(PANGAEA, 2016-07-20)Bacteriohopanepolyols (BHPs) are ubiquitous bacterial membrane lipids, encountered in soils, river and marine suspended particulate matter (SPM) and sediments. Their abundance and distribution provides a direct means to ...
Now showing items 1926-1945 of 41957