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Browsing ELibrary by Title
Now showing items 6737-6756 of 21934
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(2003)As is usual for peculiar chemical compositions, melilite-type compounds exhibit a two-dimensional incommensurately modulated structure which can be described with two wave vectors: q1=α(a* + b*) and q2=α(-a* + b*), where ...
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(1999)Measurement of susceptibility (χ) and hysteresis loops below room temperature for large multidomain hydrothermal magnetite and an acicular single domain magnetite are reported. Hydrothermal samples all display frequency ...
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(1999)A comprehensive low-temperature thermodynamic model for the geochemically important Na2CO3-MgCO3-CaCO3-H2O system is presented. The model is based on calorimetrically determined ΔfH°298 values, S°298 values and C°p(T) ...
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(2002)The heat capacity of paranatrolite and tetranatrolite with a disordered distribution of Al and Si atoms has been measured in the temperature range of 6–309 K using the adiabatic calorimetry technique. The composition of ...
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(1996)We studied Lower Jurassic (Pliensbachian-Toarcian) basalts and tuffs and Middle Jurassic (Bajocian) limestones and marls from 9 sites in the southern part of the Lesser Caucasus (ca. 39.3°N, 45.4°E). A component showing ...
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(2001)The Lower Aptian brachiopods from the Mountainous Mangyshlak, represented by 16 species in 9 genera, are studied for the first time. Three new species - Septatoechia savelievi sp. nov., Burrirhynchia luppovi sp. nov., and ...
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(2004)Conditions for indentation and channelised flow are investigated with two-dimensional thermomechanical models of Alpine-type continental collision. The models mimic the development of an orogen at an initial central portion ...
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(2005)We present a quantitative assessment of the thermal and dynamic response of an amphibolitic lower crust to the intrusion of basaltic dike swarms in an arc setting. We consider the effect of variable intrusion geometry, ...
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(2002)The large-scale POLONAISE'97 seismic experiment investigated the velocity structure of the lithosphere in the Trans-European Suture Zone (TESZ) region between the Precambrian East European Craton (EEC) and Palaeozoic ...
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(2003)The Ordovician iron oolites in Baltoscandia are generally geographically extensive but lean, [The oolites were formed during the period of the highest global iron oolite production ever. Most of the major oolites from this ...
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(2002)One of the most complete sections of Permian deposits in the southern Urals is described. It spans the middle Asselian-Artinskian interval and yields fusulinids, ammonoids, and conodonts. The upper half of the Uskalyk ...
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(2001)Recent diffusion modeling of eclogitic garnets from the Great Caucasus, Russia, and Yukon, Canada, have shown that the preservation of garnet growth zoning in rocks that have equilibrated at high temperature (680–700 °C) ...
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(1998)Apatite-dolomite carbonatite at Lesnaya Varaka, Kola Peninsula, Russia, hosts intricate mineral intergrowths composed of lueshite in the core and pyrochlore-group minerals in the rim. Lueshite is a primary Nb-bearing phase ...
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(2001)Of the terrestrial archives, loess–palaeosol sequences provide a most complete record of climatic change. This may be compared with the Marine oxygen isotope stratigraphy, and may help in the reconstruction of past atmospheric ...
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(2001)The purpose of this study was to assess, for the first time, the presence of muramic acid (Mur) and 3-hydroxy fatty acids (3-OH FAs), chemical markers for terrestrial bacteria in ''curated'' lunar samples by use of ...
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(1998)The rare earth elements (REE) and selected other trace elements were measured in plagioclase and pyroxene from nine samples of the lunar ferroan anorthosite (FAN) suite of rocks. Samples were selected from each of four FAN ...
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(2004)Studies of lunar meteorite Dhofar 026, and comparison to Apollo sample 15418, indicate that Dhofar 026 is a strongly shocked granulitic breccia (or a fragmental breccia consisting almost entirely of granulitic breccia ...
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(2001)Indigenous lunar nitrogen composition and abundances have been determined in old ferroan anorthosite 60025 and in anorthositic breccia 67915 from North Ray Crater, as well as in 55 cm deep volcanic glasses of 74001 ...
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(2003)Dhofar 287 (Dho 287), a recently found lunar meteorite, consists in large part (95%) of low-Ti mare basalt (Dho 287A) and a minor, attached portion (˜5%) of regolith breccia (Dho 287B). The present study is directed mainly ...
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(2004)Accurate estimates of global concentrations of Th, K, and FeO have an important bearing on understanding the bulk chemistry and geologic evolution of the Moon. We present empirical ground-truth calibrations (transformations) ...
Now showing items 6737-6756 of 21934