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Browsing ELibrary by Title
Now showing items 11734-11753 of 21934
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(2003)The generally accepted theory of a U-mode sutural ontogeny of prolecanitid ammonoids and their descendants is refuted. The basic suture formula of the order Prolecanitida is E A L U I (not E L U2 U1 I), resembling that of ...
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(2003)The first absolute Ar/Ar dates have been obtained for buried basalts from the pre-Jurassic basement of the West Siberian Plate, 249-250 Ma, which correspond to the Permian-Triassic boundary. The dating shows that magmatism ...
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(1999)New records of the abundance of 13C in marine organic matter have been compiled for (i) the later Neoproterozoic, from 800 to 543 Ma (346 analyses), (ii) the Cambrian through the Jurassic (1616 analyses), and (iii) the ...
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(1996)Concentrations of the Fe(CO3)OH component in goethites from Phanerozoic oolitic ironstones appear to record information on the partial pressures of soil CO2 in ancient subaerial weathering environments. Application of a ...
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(2003)Effective medium approximations for the frequency-dependent and complex-valued effective stiffness tensors of cracked/porous rocks with multiple solid constituents are developed on the basis of the T-matrix approach (based ...
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(1997)Solubilities of NiO, Coo and FeO in silicate melts have been determined experimentally as a function of temperature, oxidation state and melt composition. The results -show that Fe, Ni and Co are dissolved as divalent ...
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(1995)The effect of dissolved NaCl on equilibrium oxygen and hydrogen isotope fractionation factors between liquid water and water vapor was precisely determined in the temperature range from 130-350°C, using two different types ...
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(2003)The adsorption of glyphosate and phosphate to the goethite {010} surface (Pbnm notation) was studied using an atomic force microscope (AFM). The microscope was capable of producing molecular scale images of surfaces exposed ...
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(1997)In order to evaluate the thermodynamics and reaction mechanisms of the adsorption and reduction of gold on galena surfaces, reaction energies were calculated for the adsorption of AuCl-4 from solution and for the stepwise ...
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(2002)The adsorption of gold by pyrite, pyrrhotite, and mackinawite from solutions containing up to 40 mg/kg (8 μm) gold as hydrosulphidogold(I) complexes has been measured over the pH range from 2 to 10 at 25°C and at 0.10 m ...
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THE AGE OF CHOKUSU BEDS IN THE KYZYL-DZHAR-CHOKUSU SECTION (THE SILURIAN OF NORTHWESTERN MONGOLIA) (2000)The rock succession and age of the Chokusu Beds in the Mt. Kyzyl-Dzhar-Chokusu section is considered to be either the Ludlovian-Pridolian or Wenlockian-early Ludlovian. The discrepancy resulted from a complicated geological ...
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(2004)The results of absolute dating of mineral organic remains on Ob along the Polar Circle are presented. The most interesting data in the range 25-15.5 thousand years for the first time demonstrate that in the period of ...
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(2004)The Baraba Formation exposed in the Sredinnyi Range (Kamchatka), where it is composed of ter- restrial conglomerates, was considered for a long time as the late Campanian-lower Maastrichtian in age based on the fossil flora ...
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(1995)Forty years ago, Patterson in his pioneering work on lead isotopes defined the age of the Earth and of the meteorites with 4.55 Ga. We reconsider the question of the age of the Earth and its relation to the age of the ...
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(2001)The energy conservation law, when applied to the Earth's core and integrated between the onset of the crystallization of the inner core and the present time, gives an equation for the age of the inner core. In this equation, ...
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(1997)A zircon age was determined for diorite from the Zhemchuzhnyi drusite complex, which was used as a reference complex in recognizing the prefolding and premetamorphic basites. There are two populations of zircon which differ ...
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(1998)Recent finds of conodonts indicate that the volcanogenic sequence in the Gobi Altai-Suhe Bator Zone of southern Mongolia (the Gobi Altai Formation in the Dzhinsetu Ulul Range area and the Minzhin Formation in the Mandai ...
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(2000)Two sections of Albian-Cenomanian boundary beds are studied in the Bakhchisarai area of the southwestern Crimea near the Research-Training Center of the Geological Faculty of the Moscow State University. Ages of ...
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(1995)Albite feldspar was hydrolyzed over a wide-range of pH conditions at 100, 200 and 300°C. The release rates of Na, Al, and Si were measured as a function of time from the initial, pre-steady-state phase to the attainment ...
Now showing items 11734-11753 of 21934