On the destructive tendencies of cratons
On the destructive tendencies of cratons
复制标题
论克拉通的破坏倾向
DOI：
--
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
M. Miller
中科院分区：
文献类型：
--
作者：
C. Cooper;R. Farrington;M. Miller
我们认为，俯冲板块可能通过引导地幔沿克拉通边缘流动而引起岩石圈移动。这个过程可以雕刻和塑造克拉通，导致影响岩石圈整体稳定性的条件。我们使用三维地球动力学模型来研究俯冲驱动的定向流是如何与不同形状的克拉通岩石圈相互作用的，结论是边缘形状既控制着克拉通周围流动的通道化，也控制着克拉通周围流动的破坏潜力。模拟结果表明，所有克拉通形状都有利于河道化，但边缘垂直直的克拉通抗变形能力最强，边缘逐渐变厚的克拉通抗变形能力较弱。对形状的依赖可能导致克拉通岩石圈沿其边缘在失控过程中逐渐移动，直到形成更稳定的垂直边缘形状。
We propose that subducting slabs may cause lithospheric removal by directing mantle flow along the craton margin. This process could carve and shape the cratons, leading to conditions that impact the overall (in)stability of the lithosphere. We use three-dimensional geodynamic models to investigate how subduction-driven directed flow interacts with cratonic lithosphere of differing shape, concluding that the margin shape controls both channelization of flow around the craton as well as the potential for destruction. While the simulations show that all craton shapes aid in channelization, the cratons with straight vertical margins are the most resistant to deformation, and the cratons with gradually thickening margins are less resistant to deformation. The dependence on shape could contribute to the progressive removal of cratonic lithosphere along its margin in a runaway process until a more stable vertical margin shape evolves.
影响因子：
3.5
作者：
S. Fishwick
通讯作者：
S. Fishwick