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Browsing ELibrary by Title
Now showing items 5299-5318 of 21934
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(2002)The thermal diffusivity of quartz, orthoclase, and sanidine was measured in different directions by a transient method, to determine the second-rank tensor of thermal transport properties as a function of temperature up ...
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(2002)A two-dimensional modelling study of sedimentation, fluid flow, and heat flow in the Baikal rift basin undergoing flank uplift and basin subsidence has been performed in order to understand the impact of these processes ...
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(2003)The thermal transport properties thermal conductivity and thermal diffusivity were examined for a variety of serpentinites as a function of temperature at ambient pressure. The thermal transport properties of serpentinites ...
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(2006)We provide new estimates for the abundance of heat-producing elements in the lunar mantle by using SIMS techniques to measure the concentrations of thorium and samarium in lunar pyroclastic glasses. Lunar pyroclastic glasses ...
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(2005)Aqueous fluid inclusions in anhydrite that are frozen during microthermometry commonly develop new daughter crystals. Heating these inclusions induces the new daughter crystals to decompose. Repeated cycles of crystal ...
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(2003)Fusion enthalpies were measured by differential scanning calorimetry (DSC) for mineral mix-tures of eutectic composition in the systems anorthite-diopside (An42Di58, wt%), anorthite-akermanite (An46Ak54), akermanite-diopside ...
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(1988)Eastern Transbaikal within the Chita oblast is traditionally regarded as having no potential for oil, gas and salts because suitable sedimentary strata are absent here. However, it has long been known that in the Torey ...
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(1998)Trace element partitioning between clinopyroxene and melt was investigated experimentally under conditions appropriate to near-solidus melting of spinel lherzolite in the upper mantle. Starting material was a high-Na, Al ...
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(1992)A wide variety of sediment types (mud to sandy gravel) was obtained at fourty-seven stations on the southern Black Sea shelf and upper slope and analyzed for their heavy-metal geochemistry. Distribution of grain size, ...
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(1998)The problem of understanding, assessing and quantifying the causes of sea-level changes has received increased attention during the past several years, in particular in connection with predictions regarding a rise in the ...
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HELIOLITOID CORALS WITH CORMIDIA: CHARACTERIZATION, TAXONOMIC COMPOSITION, AND STRATIGRAPHIC RANGE (2004)Four types of heliolitoid cormidia are established and characterized. Cormidia occur in 4 orders, 6 families, 27 genera, and 103 species. The heliolitoids with cormidia, as well as the entire subclass Heliolitoidea, reached ...
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(1985)A model of 4 He accumulation in a confined aquifer is presented which includes in situ production and a crustal degassing flux of 4 He into the bottom of a confined aquifer. The model is consistent with the measurements ...
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(1986)The isotopic compositions of He and Sr have been obtained for suites of ultramafic xenoliths brought to the surface by Recent volcanic eruptions in continental environments. Samples include a range of petrologic types from ...
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(2000)We developed a technique for extracting 4He from apatite and titanite using laser heating that permits measurement of U and Th and, hence, (U-Th)/He ages, on a single sample aliquot. Unlike direct laser heating, quantitative ...
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(1999)We have explored the diffusivity characteristics of radiogenic He in titanite (sphene) and have developed analytical techniques for (U-Th)/He dating of this mineral. Results of incremental He outgassing experiments performed ...
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(1996)To investigate the potential of the (U-Th)/He system for low-temperature thermochronometry, we have studied helium diffusion and have measured helium ages on Durango fluorapatite and on apatites from a gabbro and two ...
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(2006)Helium isotopes have been measured in samples of two ferromanganese crusts (VA13/2 and CD29-2) from the central Pacific Ocean. With the exception of the deepest part of crust CD29-2 the data can be explained by a mixture ...
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(2002)The 3He/ 4He = R ratio was studied in underground fluids from 104 sites from the Baikal Rift Zone, BRZ, and adjacent areas in Russia and Mongolia. The R values vary from 1.0×E-8, typical of crustal radiogenic He, up to ...
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(2000)The aim of this paper was to generalize the results of studying the helium isotope composition in the subsurface fluids of the Baikal-Mongolia region for the last quarter of the XX century. The 3He/4He= R ratios were ...
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(2003)The 3 He/ 4 He = R ratio was studied in underground fluids from 104 sites from the Baikal Rift Zone (BRZ) and adjacent areas in Russia and Mongolia. The R -values vary in a wide range from R=0.01R A (crustal radiogenic He) ...
Now showing items 5299-5318 of 21934