Isotopic geochemistry of sulphur

Ault, Wayne U.; Kulp, J. Laurence

doi:10.1016/0016-7037(59)90112-7

Cited by 143 publications

(47 citation statements)

References 20 publications

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“…This accords with the average d 34 S value of + 2.4 per mil obtained by Ault and Kulp (1959) for sulfides in and associated with mafic igneous rocks. The sulfides in the gneissic wall rocks are isotopically heavier than those in the ultramafic body proper.…”

Section: Hiturasupporting

confidence: 90%

Sulfur isotopes in Finnish nickel-copper occurrences

Papunen¹,

Mäkelä²

1980

Bull Geol Soc Finland

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The sulfur isotope composition of the Hitura, Kotalahti and Kylmä-koski Ni-Cu ores was analyzed. The results have been compared with earlier sulfur isotope analyses of the Vammala, Laukunkangas and Oravainen Ni-Cu occurrences. Altogether 183 analyses were performed. The magmatic origin of sulfides is supported by the isotope compositions that deviate only slightly from the meteoritic value. It is suggested that the initial sulfur isotope composition was homogeneous, ö® 4 S values being ca. + 2.5 at Hitura, + 2.0 at Kotalahti, close to zero at Kylmäkoski and at Laukunkangas, -1 at Vammala and + 2.8 at Oravainen. The metamorphic redistribution of sulfides and the mixing of magmatic Ni-Cu sulfides with wall-rock iron sulfides cause local variations in <5 84 S values.

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Section: Hiturasupporting

confidence: 90%

Sulfur isotopes in Finnish nickel-copper occurrences

Papunen¹,

Mäkelä²

1980

Bull Geol Soc Finland

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“…3 Frequency distribution of stable isotope ratios of sulfur in freshwater sulfate, freshwater prey, freshwater fish, marine fish, marine zoo plankton and marine water sulfate obtained from the literature (Ault and Kulp 1959;Thode et al 1961;Hartmann and Nielsen 1964;Sasaki 1972;Gormly and Sackett 1977;Rees et al 1978;Fry 1983;Nriagu and Soon 1985;Peterson et al 1985;Fuller et al 1986;Fry 1988;Hesslein et al 1988Hesslein et al , 1991Krouse and Herbert 1988;Nriagu et al 1991;Andersson et al 1992;Caron et al 1996;Yang et al 1996;MacAvoy et al 1998;Chanton and Lewis 1999;Doucett et al 1999a, b;Power et al 2002;Weber et al 2002;Spence and (Fig. 4).…”

Section: Countmentioning

confidence: 99%

Sulfur isotopes in otoliths allow discrimination of anadromous and non-anadromous ecotypes of sockeye salmon (Oncorhynchus nerka)

et al. 2010

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Oncorhynchus nerka occur both as anadromous sockeye salmon that spend most of their life in the ocean, and as non-anadromous kokanee salmon that remain in fresh water their entire lives. We assessed whether stable isotopes of sulfur (δ 34 S) in otoliths could be used to distinguish sockeye salmon and kokanee ecotypes that are otherwise difficult to identify when they share a common freshwater rearing environment. We also investigated the chemical link between salmon and their diet by measuring δ 34 S in various fish tissues (eggs, muscle, scales) and zooplankton. δ 34 S (mean±SE) in sockeye salmon eggs (18.7±0.4‰) and marine zooplankton (20.5±0.1‰) were enriched by 10-14‰ compared with kokanee eggs and freshwater zooplankton. δ 34 S in the otolith cores of sockeye salmon (19.2±0.7‰) and kokanee salmon (5.3±1.1‰) were similar to δ 34 S in marine and freshwater zooplankton, respectively, indicating that the core is derived from maternal yolk tissue and reflects the maternal diet. δ 34 S in the freshwater growth zone of otoliths did not differ significantly between sockeye (5.9±1.1‰) and kokanee salmon (4.4± 1.2‰), and was similar to freshwater zooplankton. The mean difference between δ 34 S in the otolith core and first year of growth was 13.3±1.4‰ for sockeye and 0.65±1.3‰ for kokanee salmon. A quadratic discriminant function developed from measurements of δ 34 S in otoliths of known maternal origin provided perfect classification rates in cross-validation tests. Thus, sulfur isotope ratios in otoliths are effective in discriminating between anadromous and nonanadromous ecotypes of O. nerka.

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“…Sulfates removed by exhaustive extraction of the same sample, i.e., solid sulfate, gave a value of-14.4"/oo. This value is unusual for sulfates and lies in the range of values of sedimentary sulfides, and free sulfur of biogenic origin (Ault and Kulp, 1959). It may represent reoxidation of sulfur previously fractionated by microbiotic reduction of sulfates.…”

Section: Resultsmentioning

confidence: 80%