来自三维地震反射图像的证据表明,在中洋山脊不连续性下面的化供应增强了
1Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, University of California, San Diego, La Jolla 92093, USA. gkent@ucsd.edu
Nature
|August 19, 2000
概括
研究中海山脊的融化分布显示,在重叠的扩散中心下面有强大的岩供应. 这表明从地幔中融化运输并集中在地中部,而不是地再分配.
科学领域:
- 地质物理学 地质物理学
- 海洋地质学海洋地质学
- 构造学 构造学 构造学 构造学
背景情况:
- 了解中洋山脊不连续性的融化分布和地结构是岩,构造和岩石学细分的关键.
- 在重叠的扩散中心下面的岩体几何学影响了岩组成和地幔流动模式.
研究的目的:
- 通过使用3D地震反射来研究跨山脊轴不连续性的融化分布.
- 了解重叠的扩散中心下面的岩体的性质.
主要方法:
- 三维的地震反射成像.
- 从东太平洋上升的9度03'N重叠的传播中心对地震数据的分析.
主要成果:
- 在重叠的扩散中心的两个四肢下确定了强大的岩供应.
- 在重叠盆地的大面积下观察到融化池.
- 融化分布几何不符合从上游中心的大规模地再分配.
结论:
- 融化分布主要由来自地幔的垂直融化运输控制.
- 在地中部的结边界下面化的聚焦形成了观察到的几何形状.
- 这为中洋山脊的细分提供了洞察力.
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