Integrated dynamic models of subduction initiation, slab evolution, arc - back-arc deformation and mantle convection

俯冲起始、板块演化、弧-弧后变形和地幔对流的综合动力学模型

• 批准号: DP0451517
• 负责人: A/Prof Wouter Schellart
• 金额: $ 16.89万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2004
• 资助国家: 澳大利亚
• 起止时间: 2004-03-01 至 2007-02-28
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0451517
• 关键词: Integrated; dynamic; models; subduction; initiation

A major debate in plate tectonics concerns the driving mechanism for formation of extensional back-arc basins in the overriding plate along a convergent tectonic boundary, where a subducting plate is thrust into the mantle underneath an overriding plate. One hypothesis states that such extension results from sinking and rollback of the subducting plate. The physical validity of this hypothesis will be tested using both laboratory and numerical modelling techniques. The modelling will investigate overriding plate - subducting plate - mantle interaction in three-dimensional space and quantify the role of key physical parameters on the subduction process.

板块构造学中的一个主要争论点是关于伸展弧后盆地形成的驱动机制，这些盆地是在上覆板块沿着会聚构造边界形成的，在会聚构造边界处，俯冲板块被推入上覆板块下方的地幔。一种假说认为，这种伸展是俯冲板块下沉和回滚的结果。这一假设的物理有效性将使用实验室和数值模拟技术进行测试。该模型将在三维空间中研究覆盖板块-俯冲板块-地幔的相互作用，并量化关键物理参数对俯冲过程的作用。