Research on carbon and oxygen isotopes in phosphorus-bearing rock series of the Late Neoproteroic-Early Cambrian Taozichong Formation in Qingzhen City, Guizhou Province, Southwest China

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• 作者：Tie Mao (1)
  Ruidong Yang (1)
  Jiaren Mao (1)
  Chun Ye (2)
  Kun Liu (1)
  Junbo Gao (1)
  
• 关键词：carbon ; oxygen isotopes ; Taozichong Formation ; Neoproterozoic ; Early Cambrian ; Guizhou Province
• 刊名：Chinese Journal of Geochemistry
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：33
• 期：4
• 页码：439-449
• 全文大小：737 KB
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• 作者单位：Tie Mao (1)
  Ruidong Yang (1)
  Jiaren Mao (1)
  Chun Ye (2)
  Kun Liu (1)
  Junbo Gao (1)
  
  1. College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China
  2. Guizhou Mining Right Reserve & Trading Bureau, Guiyang, 550001, China
  
• ISSN：1993-0364

文摘

In the study of the phosphate-bearing stratum at the bottom of the Cambrian system, the authors found that there occurred carbon isotope negative anomalies in the Taozichong section phosphate-bearing stratum in Qingzhen, Guizhou Province; they can be correspondingly compared with other synsedimentary carbon isotope negative anomalies both at home and abroad. The results showed that there occurred three negative anomalies of carbon isotopes in the Neoproterozoic-Early Cambrian Taozichong Formation, indicating that the temporal palaeo-oceanographical environment changed significantly, in which there happened two times of intensive carbon isotope variation, corresponding to creature extinction. Meanwhile, it is believed that the carbon isotope negative anomalies in phosphorites were caused by the ascending water mass of ocean current with the negative carbon isotopic composition of deep-ocean hydrothermal deposits.