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Browsing ELibrary by Title
Now showing items 1289-1308 of 22924
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(2001)Growth rings of Mesozoic fossil woods have often been used for paleoclimatological inferences. Most of the studies, however, rest upon uniformitarian deductions based on the observation of conifers from the present boreal ...
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(2002)To evaluate if a polymer is suitable for analog modeling, it is essential to know the rheological properties of the material. Polymers used in analog modeling exhibit a complex rheological behavior; only part of which has ...
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(2002)GPS measurement campaigns in the Mongolia-Baikal area show that: (1) the Baikal rift zone is currently opening at 4-5 mm yr-1 in a NW-SE direction and (2) the western part of the Amurian-north China block is moving eastward ...
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(2001)A single quartz powder was dissolved at 200°C and 250°C under far from equilibrium conditions in atmosphere-equilibrated deionized water during a sequential series of experiments performed over one year in a titanium open ...
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(1999)High precision measurements of Sr/Ca in planktonic foraminifera for the last 150 ka reveal Sr/Ca variations of up to 12% on glacial/interglacial time scales. Although records showing the largest variations appear to be ...
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(2001)In a number of subduction zones, earthquakes at 50-200 km depth define two dipping planes, separated by 20-40 km, that appear to merge downdip. Upper plane earthquakes are inferred to occur within the subducting oceanic ...
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(2003)It is now a conventional technique to determine the optimal stress from fault-slip data by inversion. However, the method is weak when applied to heterogeneous data. A new technique is presented here to visualize the ...
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(2002)This paper presents a modified ordinary kriging technique referred to as the "Area Influence Kriging" (AIK). The method is a simple and practical tool to use for more accurate prediction of global recoverable ore resources ...
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(1985)Представлены данные о региональном строении кристаллическоrо фундамента и поверхности Мохоровичича в paйoнe Мирнинского кимберлитового поля. Установлена квазианизотропия свойств пород фундамента, при котopoй граничная ...
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(1987)The meteorite crater is isometric, with some angularity. The highest evaluation of its rim is 755 m in the south and 712 m in the north. The maximum evaluation of the rim above the crater floor is 305 m. The width of the ...
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(2004)We have analysed the kinetics of Argon and CO2 diffusion in simplified iron free rhyolitic to hawaiitic melts using the diffusion couple technique. The concentration distance profiles of Ar and CO2 were measured with ...
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(1995)We have determined argon solubility and diffusivity in SiO2, NaAlSi3O8, and rhyolitic composition glasses exposed to an equimolar Ar gas mixture at 1225-2500 bars and 500-850°C. The diffusivity results from the mixedAr ...
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(2001)Neutron diffraction patterns of three argon hydrates which exist at the pressures up to 10 kbar has been studied; Rietveld refinement of their structures has been done. The phase which is stable from 1 bar to 4.6 kbar appears ...
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(2001)The role of internal deformation in resetting argon ages of micas has been investigated by measuring 40Ar/39Ar ratios of biotite and muscovite, before and after experimentally deforming them. Neither mica crushed cataclastically ...
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(2000)Understanding argon release mechanisms in K-bearing minerals is essential in interpreting the 40Ar/39Ar data and their application to geological studies. The release mechanisms of argon in vacuo have been examined in a ...
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(1996)Few minerals have as many different geological applications for K-Ar or 39Ar/40Ar dating as alunite (KAl3(SO4)2(OH)6), but a basic understanding of the systematics of argon release from this mineral is lacking. Progressive ...
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(2003)Sized aggregates of glasses (47-84 wt% SiO2) were fused from igneous-derived cohesive fault rock and igneous rock, and step-heated from ~400 to >1,200 °C to obtain their 39Ar diffusion properties (average E=33,400 cal ...
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(1996)A CO2 laser-heated diamond anvil cell was used for performing argon solubility experiments in silicate melts. This technique allowed solubility experiments to be carried out at much higher pressures than in a piston-cylinder-type ...
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(2002)The similarity in the skeleton model of the brachiolar food-gathering system of Blastozoa and the arm system of Crinozoa, including the apical growth with enantomorphous displacement of skeletal ele-ments, is explained by ...
Now showing items 1289-1308 of 22924