Geodynamics of the active continental mantle lithosphere

活动大陆地幔岩石圈的地球动力学

• 批准号: 227409-2009
• 负责人: Pysklywec, Russell
• 金额: $ 2.91万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=496971
• 关键词: Geodynamics; active; continental; mantle; lithosphere

The proposed research will investigate the dynamics of the active continental mantle lithosphere (i.e., sub-crustal lithosphere) and its relationship to crustal tectonics. The mantle lithosphere makes up the largest component member of the tectonic plates, but compared to the overlying crust and fluid mantle below, its evolution is little studied and poorly understood. The research program will make tangible advancements in our understanding of this part of the Earth by addressing questions in three environments where continental mantle lithosphere is/was tectonically active: (1) what happens to consumed mantle lithosphere plate at a continental plate collision?; (2) How/why are large blocks of mantle lithosphere missing at various locations around the Earth?; (3) How did the different natural (atmospheric, solid Earth) environment during the Earth's infancy in the Archean change the way mantle lithosphere behaved? The research program will try to answer these questions by a cross-disciplinary "top-down" methodology, wherein new and developing techniques of computational and laboratory modeling of dynamic Earth processes will be integrated with associated geological/geodetic/geophysical observational constraints.

拟议的研究将调查活动大陆地幔岩石圈的动力学（即，亚地壳岩石圈）及其与地壳构造的关系。 地幔岩石圈是构造板块中最大的组成部分，但与上覆地壳和下伏流体地幔相比，其演化研究较少，认识也不清楚。 该研究计划将通过解决大陆地幔岩石圈构造活动的三种环境中的问题，在我们对地球这一部分的理解方面取得切实的进展：（1）大陆板块碰撞时消耗的地幔岩石圈板块会发生什么？(2)在地球周围不同的地方，大块的地幔岩石圈是如何/为什么消失的？(3)在太古代地球的幼年期，不同的自然环境（大气，固体地球）是如何改变地幔岩石圈的行为方式的？ 该研究计划将试图通过跨学科的“自上而下”的方法来回答这些问题，其中动态地球过程的计算和实验室建模的新技术和开发技术将与相关的地质/大地测量/地球物理观测约束相结合。