Browsing by Title
- DSpace Home
- →
- Browsing by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Title
Now showing items 9019-9038 of 42285
-
(2002)The oxygen three-isotope plot provides valuable insights to geochemical and cosmochemical processes in which the relationship of 17O/16O relative to 18O/16O is of interest. It is generally recognised, however, that the ...
-
(2000)Development of isotopic fractionation in a condensed phase during congruent evaporation by abrupt heating is modeled to estimate heating conditions in the solar nebula. Effects of elemental diffusion in the condensed phase, ...
-
(2002)Large equilibrium isotope fractionation occurs between Fe(III) and Fe(II) in very dilute (≤22 mM Cl−) aqueous solutions, reflecting significant differences in bonding environments. Separation of Fe(III) and Fe(II) is ...
-
(2005)The extent of fractionation of sulfur (S) isotopes during precipitation of basaluminite and alunite in supersaturated Al2 (SO4)3 solutions was determined in a laboratory synthesis experiment. An acid 0.05 M Al2 (SO4)3 ...
-
(2004)Minerals from some talc, tungsten, and gold deposits in the Urals are genetically related to fluids similar in oxygen and hydrogen isotopic compositions. The hydrogen isotopic composition is typical of magmatic fluids. ...
-
(1995)Variations in the isotopic composition of rocks derived from the upper mantle can be used to infer the chemical history and structure of the Earth's interior. The most prominent material in the upper mantle is the source ...
-
(2001)Isotope and geochemical techniques are the primary way in which the residence time, recharge conditions and subsequent evolution of palaeowaters can be determined. Isotopic species and noble gas concentrations are used as ...
-
(2002)The relationship between molluscan shell growth rate and skeletal δ18O and δ13C was investigated in a detailed field study for the scallop, Pecten maximus. Seasonal variation in shell growth rate was found to be a governing ...
-
(1998)Based upon dissolution of feldspars under controlled laboratory conditions, we conclude that Sr release, at pH 3, is neither consistently stoichiometric nor constant for the feldspars measured. Bytownite, microcline, and ...
-
(1998)Based upon dissolution of feldspars under controlled laboratory conditions, we conclude that Sr release, at pH 3, is neither consistently stoichiometric nor constant for the feldspars measured. Bytownite, microcline, and ...
-
(2001)We performed isotopic analyses of Carboniferous brachiopod shells from the Russian Platform to examine global and regional environmental change along the western and eastern margins of Laurussia during the formation of ...
-
ISOTOPIC SEARCH FOR LIVE 135CS IN THE EARLY SOLAR SYSTEM AND POSSIBILITY OF 135CS-135BA CHRONOMETER (2001)Here we report the isotopic excess of 135Ba studied from Ba isotopic measurements of acid leachates of Allende calcium-aluminum rich inclusions (CAIs) and two primitive chondrites, Beardsley (H5) and Zag (H6 clasts). From ...
-
(2004)Considered is the process of isotopic separation capable to explain the anomalous isotopic composition of sulfur of Norilsk deposits without employing the concepts of crust sulfur contamination. The estimation of isotopic ...
-
(2004)This contribution presents the first detailed oxygen and carbon isotope record from the latest Jurassic-early Cretaceous interval of the Yatria River, subpolar Urals, Siberia. Isotopic compositions have been determined on ...
-
(2000)Nitrogen concentrations and isotopic signatures have been determined in groups IIE and IVA iron meteorites. Contrary to assumptions made in the literature, the present data show that spallation components significantly ...
-
(2006)New isotope data on Lower Cambrian rocks of the Irkutsk amphitheater are reported in three communications. The first communication is devoted to the sulfur isotopic composition, which is most sensitive to ostsedimentary ...
-
(2006)Rb-Sr data were obtained for different Lower Cambrian rocks from boreholes Bel'sk and Zhigalovo drilled in the Irkutsk amphitheater. Shales in the lower part and insoluble residue of marls throughout the entire (up to 2 ...
-
(2006)In previous communications based on the study of sulfur and strontium, we showed that Lower Cambrian rocks of the Irkutsk Amphitheater underwent a significant epigenetic transformation. All postsedimentary alterations of ...
Now showing items 9019-9038 of 42285