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  • 1
    Book
    Book
    Stable isotopes : natural and anthropogenic sulphur in the environment (1991)
    Chichester [u.a.] : Wiley
    Details Availability
    Keywords: Sulfur cycle ; Sulfur Isotopes ; Geochemie ; Schwefel ; Schwefelkreislauf ; isotopes ; Konferenzschrift ; Umwelt ; Schwefelisotop ; Schwefelkreislauf ; Schwefel ; Stabiles Isotop ; Schwefel ; Umwelt ; Schwefelisotop ; Umwelt
    Type of Medium: Book
    Pages: XXV, 440 S , Ill , 24 cm
    ISBN: 0471926469
    Series Statement: SCOPE 43
    DDC: 574.5/222
    RVK:
    WK 2200
    RVK:
    AR 25100
    Language: English
    Note: "Draws on the results of a major international scientific workshop held in Pushchino (Moscow Region) in summer 1983, organised jointly by the United Nations Environment Programme (UNEP) and SCOPE"--Pref. - Includes bibliographical references and index , Literaturangaben
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  • 2
    Electronic Resource
    Electronic Resource
    Online Sulfur-Isotope Determination Using an Elemental Analyzer Coupled to a Mass Spectrometer (1994)
    s.l. : American Chemical Society
    Analytical chemistry 66 (1994), S. 2816-2819 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00090a005
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  • 3
    Electronic Resource
    Electronic Resource
    On the theory of an Omegatron with asymmetric three-dimensional electric fields: Ion trajectories and resonance peak shapes (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 2036-2042 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The theory and modeling of an Omegatron, an instrument exploiting the cyclotron resonance principle for various laboratory measurements, is revisited. A general model for the ion motion in the instrument is developed to compute expected resonance peak shapes. In order to numerically integrate the equation of ion motion, the actual three-dimensional electric field in which the ions move is computed. With this model, the influence of various parameters on the shape of the resonance peaks is studied, and the theoretical findings are compared with experimental results. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1357229
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  • 4
    Electronic Resource
    Electronic Resource
    Origins of metamorphic lode gold deposits: Implications of stable isotope data from the central Rocky Mountains, Canada (1991)
    Springer
    Mineralogy and petrology 43 (1991), S. 193-209 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Zusammenfassung Die vorliegende Arbeit befaßt sich mit der Untersuchung der Geochemie stabiler Isotope goldführender Quarzgänge in schwach metamorphen Sedimenten der zentralen Rocky Mountains in Britisch Kolumbien, Kanada. Die Resultate ergänzen früher publizierte geologische und geochemische Daten. Die δ34S-Werte von Gang-Pyrit liegen zwischen + 14.2 und + 16.3‰ (CDT); gleichzeitig gebildeter Bleiglanz hat δ34S-Werte von + 11.4 bis + 13.3‰. Die Isotopengeothermo metrie des Pyrits und Bleiglanzes ergibt eine mittlere Mineralisationstemperatur von 300°C + 43° für diese beiden Minerale. Vergleiche der 8345-Werte des Gang-Pyrits mit denen von Pyrit-Porphyroblasten des Nebengesteins lassen für die Gang-Pyrite eine Herkunft des Schwefels aus dem Nebengestein als wahrscheinlich erscheinen. Die Δ18O-Werte von Quarziten und Peliten, die als Nebengesteine auftreten, streuen von + 12.0‰ bis + 13.5‰ (SMOW), beziehungweise von +9.5 bis + 10.5‰ Quarz goldführender Gänge hat δ18O-Werte, die zwischen + 13.0‰ und + 15.0‰ (SMOW) liegen. Er wurde als Gangfüllung wahrscheinlich bei sinkenden Temperaturen aus post metamorphen wäßrigen Lösungen abgesetzt. Flüssigkeitseinschlüsse von Gangmineralien zeigen δD-Werte von -105 bis -124‰ (SMOW). Die H-O-Isotope sind deshalb ein Hinweis dafür, daß als mineralisierende Lösungen isotopisch veränderte meteorische Wässer in Betracht zu ziehen sind. Bei der Deutung der Herkunft der mineralisierenden wäßrigen Lösungen von mesothermalen Goldgängen muß die Kenntnis der H-Isotope als kritisch betrachtet werden. Die Seltenheit mit der H-Isotopendaten dieses Lagerstättentyps in der Literatur diskutiert werden, dürfte ein wesentlicher Grund dafür sein, daß die Rolle meteorischer Wässer bei der Genese mesothermaler, in Metasedimenten liegender Goldgänge, vielfach übersehen wurde.
    Notes: Summary The stable isotope geochemistry of native gold-bearing quartz veins contained within low-grade metasedimentary strata in the central Canadian Rocky Mountains, British Columbia is examined. The data augment previous geological and geochemical studies. Vein pyrite δ34S values cluster between + 14.2 and + 16.3‰ (CDT). Coeval galenas exhibit δ34S values between + 11.4 and 13.3‰. Pyrite-galena geothermometry reveals a mean temperature of mineralization of 300 ± 43°C. Comparison of δ34S values for the vein pyrites, with values for pyrite porphyroblasts in country rocks suggests that vein sulfur was probably derived from the host rocks. δ18O(SMOW) values of host quartzites and pelites cluster between + 12.0 and + 13.5‰, and + 9.5 and + 10.5‰, respectively. Auriferous vein quartz exhibits Δ18O values between + 13.0 and + 15.0‰. Veins were likely deposited from fluids undergoing post-peak metamorphic cooling. Vein inclusion fluids exhibit Δ values between −105 and −124‰ (SMOW). Combined O-H-isotope data are most compatible with a source fluid involving chemically- and isotopically-evolved meteoric waters. The critical role of H-isotope data in the evaluation of source fluids for such mesothermal gold lodes is stressed. The paucity of H-isotope data pertaining to the study of lode gold deposits in similar low-grade metasedimentary domains suggests that the involvement of meteoric waters may at times be overlooked.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01166891
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  • 5
    Electronic Resource
    Electronic Resource
    Variations in sulphur content and stable sulphur isotope composition of vegetation near a SO2 source at Fox Creek, Alberta, Canada (1980)
    Springer
    Oecologia 44 (1980), S. 248-257 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The proportion of sulphur found in vegetation increases as an industrial sulphur dioxide emission source is approached, but this trend is modified by topographic extremes. Stable sulphur isotope analysis revealed that increased sulphur concentrations in arborcal and terricolous lichens, andPicea glauca needles were due to incorporation of sulphur emitted as sulphur dioxide by the Kaybob sour gas plant near Fox Creek, Alberta, Canada. It is confirmed thatPicea glauca gets its sulphur from both the soil and the air; arboreal lichens get their sulphur primarily from the atmosphere; and terricolous lichens get theirs from the air and particulate fallout. It is suggested that arboreal lichens selectively excrete isotopically light sulphur when thallus concentrations exceed 1,400 ppm. Accumulation of sulphur in vegetation is dependent, on fumigation episode duration, frequency, and concentration, as well as the plant's ability to avoid injury, but is not closely correlated with average sulphation rates. The implications of terrestrial moss-lichen carpet destruction is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00572687
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  • 6
    Electronic Resource
    Electronic Resource
    Rates of emission of H 2 S from plants and patterns of stable sulphur isotope fractionation (1981)
    [s.l.] : Nature Publishing Group
    Nature 289 (1981), S. 672-673 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Rates of emission of H2S were measured for 10-week-old soybean plants (Glycine max L. Merr. cvs. Kent, Peking and York) raised in growth cabinets. Days were 12 h long, photosynthetically active radiation (PAR) was about 600 mE m-2 s-1, humidity was 50-60% and the temperature was 15 C at night and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/289672a0
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  • 7
    Electronic Resource
    Electronic Resource
    δ34S, δ18O, δ D in shallow groundwater: Tracing anthropogenic sulfate and accompanying ground water/rock interactions (1995)
    Springer
    Water, air & soil pollution 79 (1995), S. 279-298 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The objectives of this study are to assessδ 34S as a tracer of anthropogenic SO 4 2− in groundwater and to document geochemical interactions that take place as a result of industrial SO 4 2− loading. During four separate sampling excursions, groundwater samples were obtained from 13 piezometers which surround the elemental S storage blocks at a processing facility for sour (H2S) natural gas in Alberta, Canada. Each sample was analyzed forδ 34Ssulfate,δ 18Osulfate,δ 18Owater,δDwater, major aqueous species, alkalinity, pH, temperature and dissolved O2. Hydraulic head measurements were taken to define the groundwater flow field. In the study area, anthropogenic SO 4 2− has aδ 34S of approximately +18‰ (CDT), while natural groundwater SO 4 2− is depleted to about −12%. Low activity of sulfate reducing bacteria in the groundwater at this site assures thatδ 34S is a conservative tracer. Groundwater SO 4 2− concentrations increase asδ 34S approaches +18‰, suggesting that elevated SO 4 2− concentrations are due to S released by sour gas processing. Acidic waters generated by the oxidation of industrial S from the gas plant are neutralized by rock-water reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01100442
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  • 8
    Electronic Resource
    Electronic Resource
    Transformation of simulated wet sulfate deposition in forest soils assessed by a core experiment using stable sulfur isotopes (1995)
    Springer
    Water, air & soil pollution 79 (1995), S. 243-260 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effects of elevated atmospheric SO 4 2− deposition on S cycling in forest soils were assessed in an irrigation experiment using stable S isotopes. Over a period of 20 months, core lysimeters of five acidic forest soils from Southern Germany with different parent material and pedogenesis were irrigated with solutions chemically similar to canopy throughfall. Sulfate deposition in three experimental variants corresponded to 23, 42 and 87 kg S ha−1 yr−1. The SO 4 2− used for irrigation had aδ 34S ratio of +28.0‰ CDT (Canon Diablo Troilite standard), differing by more than +25‰ from natural and anthropogenic S in Southern Germany. A combination of chemical and isotopic analyses of soil and seepage water samples was used to elucidate the fluxes and transformations of simulated wet SO 4 2− deposition in each soil core. Retention of experimentally deposited S ranged from 57±5% in coarse-grained soils low in sesquioxides and clay, to 80±8% in loamy soils with high sesquioxide content. The sesquioxide content proved to be the major factor governing S retention. The ratio of S retained as inorganic SO 4 2− (mainly by adsorption) to that incorporated into organic compounds (presumably by microbial synthesis) ranged from 2 to 4. For the organic S pool, the amount of S retained as C-bonded S exceeded by far that immobilized as ester sulfate in four of the five soils. Application of34S-enriched SO 4 2− appears to be a suitable experimental tool to assess fluxes and transformations of deposited S in forest soils, if aerobic conditions are maintained. In contrast to radioactive S tracers, the concept should be applicable not only in laboratory and lysimeter experiments, but also in long term studies of whole forest ecosystems (e.g., experimental watersheds).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01100440
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  • 9
    Electronic Resource
    Electronic Resource
    sulphur isotope composition of stream water, moss and humus from eight arctic catchments in the Kola Peninsula region (NW Russia, N Finland, NE Norway) (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 191-208 
    Details
    ISSN: 1573-2932
    Keywords: environmental investigation ; 34S ; industrial emissions ; SO2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In summer 1994, stream water, moss and humus samples were collected for sulphur isotopic analysis from eight catchments located in the western Kola Peninsula region, where several industrial centres emit high loads of SO2 and other elements to the atmosphere. Three potential sources of sulphur and their isotopic signatures were identified: (1) marine (δ34S +20 to +21‰ CDT), (2) anthropogenic emissions (〈+10‰), and (3) geogenic (variable δ34S, mostly 〈+10‰). Averaged per catchment, the sulphur isotopic composition varies between +6.0 and +16.3‰ for stream water sulphate, +6.0 and +8.4‰ for moss sulphur, and +5.2 and +12.2‰ for humus sulphur. The δ34S composition of stream water from the more remote catchments is quite variable, reflecting several natural (geogenic) sources, but it becomes restricted to the range +8 to +10‰ near the pollution sources. A plot of δ34S vs. 1:SO4 in stream water suggests that sulphate originating from the smelters has a δ34S value ≈+9.5‰, and is a dominant source. Sulphur isotope values for moss and humus are consistent with the deduced composition for the emitted sulphur, though for humus a component of geogenic sulphur incorporated via vegetation uptake may play a role. Further isotopic characterisation of atmospheric emissions, together with environmental samples, is needed to better understand sulphur sources and sinks in the area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026498824698
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  • 10
    Electronic Resource
    Electronic Resource
    Nitrogen movement and transformation in soils (1969)
    Springer
    Plant and soil 31 (1969), S. 224-237 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01373567
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