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首页> 外文期刊>Carbonates and Evaporites >Sulfur isotopes in anhydrites from the Upper Devonian Prypiac’ and Dnipro-Donets Basins (Belarus and Ukraine)
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Sulfur isotopes in anhydrites from the Upper Devonian Prypiac’ and Dnipro-Donets Basins (Belarus and Ukraine)

机译：上泥盆纪Prypiac′和Dnipro-Donets盆地（白俄罗斯和乌克兰）的硬石膏中的硫同位素

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摘要

Upper Devonian evaporite rocks worldwide record a marked sulfur isotope excursion to heavier δ34S values. New δ34S data from anhydrite laminae in halite, anhydrite in water-insoluble residue in halite and sulfate from massive sulfate units in evaporite sequences of the Prypiac’ and Dnipro-Donets Basins of Belarus and Ukraine are presented. The mean δ34Ssulfute is 27.6‰±3.0‰ (n=60) with a range from 21.9‰ to 35.6‰ The mean values for Frasnian and Famennian evaporites are similar: 27.5‰±3.8‰ (n=30) and 27.7‰±1.9‰ (n=30), respectively. The rocks formed in a restricted basin but its parent waters had a marine source. Bacterial sulfate reduction was the dominant process controlling δ34S of Upper Devonian anhydrite and pyrite although also disproportionation processes and secular variation played an important role. True secular isotope variation is indicated between stratigraphic units, and a range of c. 24–29‰ is assumed to be representative for oceanic sulfate of this time. New data from the Lower Eifelian suggest that the value of c. 15‰ was representative for oceanic sulfate of Eifelian time, and this indicates the increase of δ34S values of oceanic sulfate by 12‰ during ca. 11 Ma. Subsequently, δ34S values show high plateau of 27‰ during ca. 12 Ma (Early Frasnian to Late Famennian) with some oscillation reflected in the mean values for particular evaporite units.
机译：全球上泥盆纪蒸发岩记录到明显的硫同位素偏移，δ34 S值更大。给出了白俄罗斯和乌克兰普里皮亚克盆地和第聂伯-顿涅茨盆地的蒸发序列中来自盐岩中硬石膏层，盐岩中水不溶性残留物中的硬石膏和来自大量硫酸盐单元的硫酸盐的新的δ34S数据。 δ34硫酸盐的平均含量为27.6‰±3.0‰（n = 60），范围在21.9‰至35.6‰之间。弗拉斯尼人和法门尼亚人蒸发物的平均值相似：27.5‰±3.8‰（n = 30）和27.7‰±1.9‰（n = 30）。岩石在一个受限制的盆地中形成，但其母水有海洋来源。硫酸盐细菌还原是控制上泥盆纪硬石膏和黄铁矿的δ34S的主要过程，尽管歧化过程和长期变化也起着重要的作用。真实的长期同位素变化在地层单位之间和c范围内显示。假定24–29‰是这次海洋硫酸盐的代表。下艾菲尔山脉的新数据表明c的值。 15‰代表了伊非利亚时期的海洋硫酸盐，这表明在大约1989年期间，海洋硫酸盐的δ34S值增加了12‰。 11 Ma。随后，δ34 S值在大约127的过程中呈现出27‰的高平稳期。 12 Ma（早期弗拉斯尼期至晚法门尼期），在某些蒸发岩单位的平均值中反映出一些振荡。

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  • 来源
    《Carbonates and Evaporites》 |2007年第1期|43-54|共12页
  • 作者

    Tadeusz Marek Peryt; Anatoliy A Makhnach; Stanislaw Halas; Oleh Y. Petrychenko; Leonid F. Gulis; Svietlana M. Abravets;

  • 作者单位

    Państwowy Instytut Geologiczny Rakowiecka 4 00-975 Warszawa Poland;

    Institute of Geochemistry and Geophysics National Academy of Sciences of Belarus Kuprevich 7 220141 Minsk Belarus;

    Mass Spectrometry Laboratory Institute of Physics Maria Curie-Sklodowska University 20-031 Lublin Poland;

    Institute of Geology and Geochemistry of Combustible Minerals National Academy of Sciences of Ukraine Naukova 3A 79053 Lviv Ukraine;

    Institute of Geochemistry and Geophysics National Academy of Sciences of Belarus Kuprevich 7 220141 Minsk Belarus;

    Institute of Geochemistry and Geophysics National Academy of Sciences of Belarus Kuprevich 7 220141 Minsk Belarus;

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