一个浅水氧气最小区域在一个寡量的托尼河盆地
Yunpeng Sun1,2, Wei Wang1, Xianguo Lang3
1State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China.
Nature communications
|January 17, 2025
概括
时期 (1000720亿年前) 的海洋氧化还原条件影响了真核生物的兴起. 徐盆地的浅氧最小区域可能支持酸盐的可用性,有助于真核生物的扩张.
科学领域:
- 古海洋学是古海洋学.
- 海洋地球化学 海洋地球化学
- 生命的早期 进化 演化
背景情况:
- 纪 (1000720万年前) 标志着海洋生态系统从原生生物到真核生物主导地位的关键转变.
- 不断变化的海洋氧化还原状态被认为是这种生态转变的主要驱动因素.
研究的目的:
- 在徐盆地研究早期岩层的沉积物学和地化学特征.
- 了解海洋氧化还原条件对早期真核生物繁殖的影响.
主要方法:
- 对华南,费和华北群体的沉积物学分析.
- 使用多个氧化还原代理的地球化学分析 (例如,多余的,Ba/Al比率).
主要成果:
- 在Xuhuai盆地观察到连续的,取决于水深的氧化还原代理变化.
- 过量的和Ba/Al比率表明了初级生产力的空间变化,影响了氧化还原结构.
- 有证据表明,一个浅水氧气最小区存在于寡量化Xuhuai盆地.
结论:
- 拟议的浅氧最小区架构可能促进了生物可利用的酸盐储库.
- 这种氧化还原结构很可能有助于后续的真核生物在Tonian时期的扩张.
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