在白纪深海沉积物中的珀揭示了大规模的海
Aya Kubota1,2, Yusuke Takeda3, Keewook Yi4
1Research Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8567, Japan. a.kubota@aist.go.jp.
Scientific reports
|May 15, 2025
概括
巨大的海可以在深海环境中沉积珀,为古代地质事件提供新的见解. 这一发现揭示了珀色.
科学领域:
- 古生物学和沉积物学.
- 海洋地质学和地球物理学
背景情况:
- 海沉积物在地质记录中很难识别,特别是在深海环境中,因为保存不良和缺乏明显的特征.
- 以前的研究主要集中在Holocene沿海沉积物上,忽视了海底环境作为古海事件的潜在档案.
研究的目的:
- 作为大规模古海事件的档案,调查海底环境.
- 为了分析在早期白纪深海沉积物中发现的异常丰富的珀度.
主要方法:
- 早期白时期深海沉积物的地质分析.
- 对珀样品进行显微镜检查,以确定变形结构.
- 珀的发生与相关的沉积物结构的相关性以及质量浪费的证据.
主要成果:
- 在深海沉积物中发现了非常丰富的珀度,可以追溯到1.16亿至1.14亿年前.
- 在珀中观察到类似火焰的变形,表明软沉积物变形.
- 变形表明珀在没有显著的空气暴露的情况下到达海底,在运输和沉积过程中保持其柔软状态.
结论:
- 在深海环境中珀的存在和变形强烈暗示了大规模海的沉积.
- 珀,当保存为软沉积物时,为整个沉积过程提供了一个独特的窗口,从侵蚀到埋葬.
- 这一发现扩大了对海沉积特征及其在深海环境中的保存潜力的理解.
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