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.

板块构造中的主要辩论涉及沿着收敛构造边界形成延伸板块伸展板盆地的驱动机制，在层次边界上，俯冲板被推入覆盖板下方的地幔。一个假设指出，这种扩展是由于俯冲板的下沉和回滚而引起的。该假设的身体有效性将使用实验室和数值建模技术进行检验。该建模将在三维空间中研究覆盖板 - 俯冲板 - 地幔相互作用，并量化关键物理参数在俯冲过程中的作用。