海洋底面积和年龄之间的关系的动态原因
N Coltice1, T Rolf, P J Tackley
1Laboratoire de Géologie de Lyon, Université Lyon 1, Ecole Normale Supérieure de Lyon, Université de Lyon, CNRS, 69100 Villeurbanne, France. nicolas.coltice@univ-lyon1.fr
Science (New York, N.Y.)
|April 21, 2012
概括
海底年龄分布是由板块构造学和大陆形成的,而不仅仅是临界年龄的沉积. 模拟显示过去的海底生产率是当前水平的两倍,影响了地球科学.
科学领域:
- 地质物理学 地质物理学
- 地球科学 地球科学 地球科学
- 板块构造学是一种板块构造学.
背景情况:
- 海底年龄分布影响了地球的关键特征,如海平面和地幔热量损失.
- 目前的海底年龄分布与热对流理论关于俯冲时间的矛盾.
研究的目的:
- 调查板状行为和大陆对海底面积年龄分布的影响.
- 了解板块边界的变化如何影响这种分布随着时间的推移.
主要方法:
- 利用了地幔对流的球形模型.
- 模拟了地球的构造过程,包括板块边界的创建和破坏.
主要成果:
- 证明板状的行为和大陆创造了一个海底面积-年龄分布,代表了当今地球.
- 表明这种分布随着板块边界的演变而动态变化.
结论:
- 地幔对流模型支持板块构造学和大陆在塑造海底年龄分布中的作用.
- 历史上,海底生产率的峰值是今天的两倍,这表明过去的构造活动显著.
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