华北克拉通几个地区古元古代碳酸盐岩地层C-O同位素特征
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

中国地质调查局资助项目(1212010611801)


Carbon and oxygen isotopic characteristics of several Paleoproterozoic carbonate strata in North China Craton
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    对华北克拉通古元古代辽河群、中条群和湾子群的碳酸盐岩进行了C、O同位素研究。辽河群王家沟组条带状大理岩的δ13CPDB变化于-1.02‰~3.14‰之间,大部分在0.16‰~1.79‰之间,平均值为1.07‰,稍高于海相碳酸盐岩的δ13C平均值0.5‰,δ18OPDB变化于-17.2‰~-10.1‰之间,大部分在-13.4‰~-10.1‰之间,20组数据的均值为-11.9‰。中条群余家山组大理岩的δ13CPDB变化于-0.2‰~0.8‰之间,大部分在0~0.3‰之间,前14个样品的δ13C平均值为0.34‰,稍低于海相碳酸盐岩的δ13C平均值,后16个样品的δ13C平均值为0.54‰,与海相碳酸盐岩的δ13C平均值基本一致,其δ18OPDB变化于-7.9‰~-6.1‰之间,大部分在-7.3‰~-6.1‰之间,前14个样品的δ18O平均值为-6.80‰,后16个样品的δ18O平均值为-6.68‰,两个剖面上的δ18O值没有明显差别。阜平宋家口南湾子群大理岩δ13CPDB变化于1.0‰~3.8‰之间,平均值为2.65‰,明显高于海相碳酸盐岩的δ13C平均值0.5‰,其δ18OPDB变化于-8.8‰~-5.7‰之间,平均值为-6.97‰。研究结果表明所研究的大理岩均形成于一个比较稳定而又相对波动的气候环境,大理岩沉积期间存在海平面和气温旋回变化但没有突变事件。湾子群宋家口剖面大理岩对Jatulian事件有响应,中条群余家山组大理岩对Jatulian事件没有响应,辽河群王家沟组是否存在对Jatulian事件响应还不确切。

    Abstract:

    Carbon and oxygen isotopes of carbonate strata in Liaohe Group, Zhongtiao Group and Wanzi Group were studied in this paper. The δ13CPDB values of banded marble in Wangjiagou Formation of Liaohe Group vary from-1.02‰ to 3.14‰, mostly in the range of 0.16‰~1.79‰. The average δ13CPDB is 1.07‰, which is higher than the average δ13CPDB of marine carbonate. The δ18OPDB values of Wangjiagou banded marble vary from -17.2‰ to -10.1‰, mostly in the range of -13.4‰~-10.1‰. The average δ18OPDB is -11.9‰. The δ13CPDB values of Yujiashan marble in Zhongtiao Group vary from -0.2‰ to 0.8‰, mostly in the range of 0~0.3‰. The average δ13CPDB of fourteen samples along one section is 0.34‰, slightly lower than the average δ13CPDB of marine carbonate. The average δ13CPDB of the next sixteen samples along another section is 0.54‰, basically consistent with the average δ13CPDB of marine carbonate. The δ18OPDB values of Yujiashan marble vary from -7.9‰ to -6.1‰. The average δ18OPDB of the first fourteen samples and the second sixteen samples are -6.80‰ and -6.88‰ respectively, with no obvious difference. The δ13CPDB values of Songjiakou marble in Wanzi Group vary from 1.0‰ to 3.8‰, 2.65‰ on average, which is higher than the average δ13CPDB of marine carbonate evidently. The δ18OPDB values of Songjiakou marble vary from -8.8‰ to -5.7‰, -6.97‰ on average. The results show that all the studied marbles were formed in a comparatively stable but fluctuating environment. There existed seasonal variations of sea level and climate but no sudden drastic event during the marble sedimentary period. As to the Jatulian event, marbles in Songjiakou Formation showed response but marbles in Yujiashan formation had no response to it. The effect on Wangjiagou Formation is uncertain. This study has also proved that the Jatulian event was a global event that had extensive influence in space but could serve as an eruptive event in time scale.

    参考文献
    相似文献
    引证文献
引用本文

宋会侠,杨崇辉,杜利林,任留东,王昊,2011,华北克拉通几个地区古元古代碳酸盐岩地层C-O同位素特征[J].岩石矿物学杂志,30(5):865~872. SONG Hui-xia, YANG Chong-hui, DU Li-lin, REN Liu-dong, WANG Hao,2011,Carbon and oxygen isotopic characteristics of several Paleoproterozoic carbonate strata in North China Craton[J]. Acta Petrologica et Mineralogica,30(5):865~872.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2011-04-02
  • 最后修改日期:2011-06-14
  • 录用日期:
  • 在线发布日期:
  • 出版日期: