大陆断层在海洋转变断层中的存在是由裂继承决定的
Attila Balázs1, Taras Gerya1, Gábor Tari2
1Department of Earth and Planetary Sciences, Institute of Geophysics, Geophysical Fluid Dynamics Group, ETH Zürich, Zürich, Switzerland.
概括
在海洋断裂区中发现的大陆地的碎片通过新的数值模拟来解释. 这些模型揭示了大陆裂变如何导致断层区的转变,陷滑坡和改变海洋底的地质.
科学领域:
- 地质物理学和构造学
- 计算地质科学计算地质科学
背景情况:
- 板块构造学理论解释了通过转变断层和中洋山脊的大陆分离.
- 大陆地在海洋断裂区的碎片在全球范围内被观察到,但不是由经典理论预测的.
研究的目的:
- 通过使用数值模拟来研究从大陆裂变过渡到海洋转变断层带的过渡.
- 了解地幔融化,地构造学和转变断层区域的形成之间的关系.
主要方法:
- 采用了三维的磁性热力学数值模拟.
- 模拟模拟了从大陆裂变到海洋变形断层区的诞生过程.
主要成果:
- 大陆断层被困在海洋剪切区域中,这是从大陆裂变中继承的.
- 确定了三个转变断层区域形成的阶段:大陆裂连接,原始转变和海洋转变.
- 滑坡位与沉降和升起周期有关,这是由于不断变化的应力场,影响了海洋底的形态,中海的融化和地震性.
结论:
- 数字模拟提供了在大洋转变断层区域内大陆断层被困的机制.
- 这些发现完善了我们对板块边界演变及其对地质过程和特征的影响的理解.
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