Based on the plate reconstruction which shows that most core parts of present cratons locate in the interior of the continents during the supercontinent cycles, we propose that the oceanic subduction initiation may trigger the destruction of marginal cratonic lithosphere. We develop a simplified force analysis for the destruction of subcontinental lithospheric mantle (SCLM) by the subduction initiation. Our analysis suggests three key parameters: the SCLM thickness, the contact angle between SCLM and oceanic plate, and the coefficient of friction of the SCLM. Our numerical models further support our analysis and demonstrate that a thicker SCLM with a larger contact angle is easier to be destructed by subduction initiation, and the yield strength of the SCLM has a significant impact on the spatial range of its destruction. Our results provide important insights into the parameters controlling cratonic lithospheric destruction and explain the distribution of preserved cratons in the interior of continental plates.

中文翻译：

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大洋俯冲引发的克拉通岩石圈破坏

根据板块重建结果表明，当前克拉通的大部分核心部分在超大陆周期内都位于大陆内部，我们认为海洋俯冲的开始可能会触发边缘克拉通岩石圈的破坏。我们开发了一种简化的作用力分析，用于俯冲作用引发的破坏亚大陆岩石圈地幔（SCLM）的工作。我们的分析提出了三个关键参数：SCLM厚度，SCLM与大洋板之间的接触角以及SCLM的摩擦系数。我们的数值模型进一步支持了我们的分析，并证明了俯冲引发更容易破坏具有较大接触角的较厚SCLM，并且SCLM的屈服强度对其破坏的空间范围有重大影响。