Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2018, Vol. 54 ›› Issue (4): 752-762.DOI: 10.13209/j.0479-8023.2018.013

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Biostratigraphy and Chemostratigraphy Across the Lower Kellwasser Boundary in Laye Section, Guizhou Province

CHANG Jieqiong1, BAI Zhiqiang1, LI Yukun2, GUO Jianxiang3, PENG Yongbo4, SHEN Bing1,†   

  1. 1. The Key Laboratory of Orogenic Belts and Crustal Evolution (MOE), School of Earth and Space Sciences, Peking University, Beijing 100871
    2. Guangxi Geological Survey, Naning 530023
    3. Geology Team No. 4 of Guangxi, Naning 530033
    4. Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803
  • Received:2017-04-25 Revised:2017-06-06 Online:2018-07-20 Published:2018-07-20
  • Contact: SHEN Bing, E-mail: bingshen(at)


常洁琼1, 白志强1, 李玉坤2, 郭建祥3, 彭永波4, 沈冰1,†   

  1. 1. 造山带与地壳演化教育部重点实验室, 北京大学地球与空间科学学院, 北京 100871
    2. 广西壮族自治区地质调查院, 南宁 530023
    3. 广西壮族自治区第四地质队, 南宁 530033
    4. Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803
  • 通讯作者: 沈冰, E-mail: bingshen(at)
  • 基金资助:


In order to study biostratigraphy and chemical stratigraphy during the Lower Kellwasser event, high resolution conodonts research and chemostratigraphic framework were carried out. The data reveals that the inorganic and organic carbon isotope have a significant positive excursion at the bottom of the Laye section. It is considered that the sample LY-8 is consistent with the Lower Kellwasser boundary. The main reason for the change of carbon isotope in this area is the increase of organic carbon burial, which is caused by the increase of marine primary productivity and anoxia environment possibly.

Key words: Lower Kellwasser boundary, conodont, carbon isotope, organic carbon burial, marine primary productivity


为研究下Kellwasser事件的生物地层及化学地层特征, 对贵州拉也剖面进行细致的牙形石生物地层学和高分辨率化学地层学研究。结果表明, 剖面底部无机碳同位素及有机碳同位素有显著正向偏移, 样品LY-8代表的层位为下Kellwasser事件的界线。Kellwasser事件碳同位素变化的主要原因是有机碳埋藏量的增加, 可能是由初级生产力增加和缺氧环境共同造成的。

关键词: 下Kellwasser界线, 牙形石, 碳同位素, 有机碳埋藏, 初级生产力

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