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Updated: Jan 10, 2026
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脊脊迁移对中洋脊的岩细分的影响
S M Carbotte1, C Small, K Donnelly
1Lamont-Doherty Earth Observatory, 61 Rte 9W, Palisades, New York 10964, USA. carbotte@ldeo.columbia.edu
Nature
|June 18, 2004
概括
中洋山脊深度和形状变化与岩供应变化有关. 脊柱在地幔上的迁移速度直接影响了岩细分,解释了脊柱形态.
科学领域:
- 地质地质地质地质地质地
- 地质物理学 地质物理学
- 构造学 构造学 构造学 构造学
背景情况:
- 中洋山脊表现出系统的深度和形状变化,形成由断层划分的段落.
- 这些形态变化与地幔岩供应有关,但原因尚不清楚.
研究的目的:
- 为了研究中洋山脊形态和地幔过程之间的关系.
- 为了确定山脊迁移对岩石细分的影响.
主要方法:
- 分析了超过9500公里的中洋脊数据.
- 检查"热点"参考框架中的脊柱段形态.
主要成果:
- 快速和中间扩散山脊的岩石细分与扩散轴迁移速度相关.
- 在热点框架中,领先的山脊段与大多数不连续性的浅层,岩坚固的段落保持一致.
结论:
- 坡迁移驱动了不对称的地幔上升和集中的融化生产,创造了岩石细分.
- 这种机制解释了地结构的变化和沿中洋山脊的融化分布.
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