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Article Navigation >  Acta Sedimentologica Sinica  > 1998  >  16(4): 30-36

Bao Zhidong, Zhu Jingquan, Jiang Maosheng, Xia Yong. Isotope and Trace Element Evolution: Responding to Sea-level Fluctuation —An Example of Ordovician in Middle Tarim Basin[J]. Acta Sedimentologica Sinica, 1998, 16(4): 30-36.
Citation: Bao Zhidong, Zhu Jingquan, Jiang Maosheng, Xia Yong. Isotope and Trace Element Evolution: Responding to Sea-level Fluctuation —An Example of Ordovician in Middle Tarim Basin[J]. Acta Sedimentologica Sinica, 1998, 16(4): 30-36.
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Isotope and Trace Element Evolution: Responding to Sea-level Fluctuation —An Example of Ordovician in Middle Tarim Basin

  • 1 Petroleum University, Beijing 102200;

  • 2 Institue of Geology,Chinese Academy of Sciences, Beijing 100029

  • Received Date: 1998-04-06
  • Publish Date: 1998-08-10
  • The Strontium isotope composition of marine autogenetic minerals can reflect the sea level fluctuation trend during the minerals deposited. The analysis of the87Sr/86Sr ratio of Ordovician shows the sea level dropped in Early Ordovician and then rose continuously and stayed above the average level in M iddle and Late Ordovician in middle Tarim area. The study of oxygen isotopes indicates the dolostones of the Lower Ordovician are mainly penecontemporaneous dolostones which deposited in the sedimentary environment of the high salinity of the lower sea level. The trace elements geochemistry draws the same conclusion as that of the study of the isotope analysis. In brief, the variation trend of87Sr/86r ratio was reversely interrelated with the sea level fluctuation. Both oxygen isotopes and some elements made remarkably response to the sea level fluctuation during the O rdovician.
  • [1] 1 Depaolo D J, Ingram B L.High-resolution stratigraphy with Strontium i sotope. Science, 1985, 227: 938～941

    2 M ontanez I P, Banner J L, Olseger D A, et al.Integ rated Sr Iso- tope variation and sea-level hi story of M iddle to U pper Cambrian platform carbonates: Implications for the evolution of Cambrian sea- w ater87S r/ 86S r. Geology, 1996, 24(10): 917～920

    3 Richter F M, Row ley D B, DePaolo D J.S r isotope evolu tion oseaw ater: the role of Tectonics.Earth and Planetary S cience Let- ters, 1992, 109: 11～23

    4 Ruppel S C, J ames E W, Barrick J E, et al. High-resolution 87Sr/86Sr chemostratigraphy of the Siluri an: Implications for even t correlation and strontium flux.Geology, 1996, 24(9): 831～834

    5 孙志国, 刘宝柱, 刘健.西沙珊瑚礁锶 同位素特征及其 古环境意 义.科学通报, 1996, 43(5): 434～437

    6 刘岫峰主编.沉积岩实验室研究方法.北京: 地质出版社, 1991. 218～228
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  • Received:  1998-04-06
  • Published:  1998-08-10

Isotope and Trace Element Evolution: Responding to Sea-level Fluctuation —An Example of Ordovician in Middle Tarim Basin

  • 1 Petroleum University, Beijing 102200;
  • 2 Institue of Geology,Chinese Academy of Sciences, Beijing 100029
  • Received Date: 1998-04-06
  • Publish Date: 1998-08-10

Abstract: The Strontium isotope composition of marine autogenetic minerals can reflect the sea level fluctuation trend during the minerals deposited. The analysis of the87Sr/86Sr ratio of Ordovician shows the sea level dropped in Early Ordovician and then rose continuously and stayed above the average level in M iddle and Late Ordovician in middle Tarim area. The study of oxygen isotopes indicates the dolostones of the Lower Ordovician are mainly penecontemporaneous dolostones which deposited in the sedimentary environment of the high salinity of the lower sea level. The trace elements geochemistry draws the same conclusion as that of the study of the isotope analysis. In brief, the variation trend of87Sr/86r ratio was reversely interrelated with the sea level fluctuation. Both oxygen isotopes and some elements made remarkably response to the sea level fluctuation during the O rdovician.

Bao Zhidong, Zhu Jingquan, Jiang Maosheng, Xia Yong. Isotope and Trace Element Evolution: Responding to Sea-level Fluctuation —An Example of Ordovician in Middle Tarim Basin[J]. Acta Sedimentologica Sinica, 1998, 16(4): 30-36.
Citation: Bao Zhidong, Zhu Jingquan, Jiang Maosheng, Xia Yong. Isotope and Trace Element Evolution: Responding to Sea-level Fluctuation —An Example of Ordovician in Middle Tarim Basin[J]. Acta Sedimentologica Sinica, 1998, 16(4): 30-36.
shu

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