Crust-mantle coupling during the assembly and amalgamation of Pangea

盘古大陆组装合并过程中的壳幔耦合

• 批准号: RGPIN-2015-06385
• 负责人: Murphy, JamesBrendan
• 金额: $ 2.4万
• 依托单位: St. Francis Xavier University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633722
• 关键词: Crust; mantle; coupling; during; assembly

The repeated assembly and dispersal of supercontinents have profoundly influenced the Earth’s evolution. Pangea, the latest of these supercontinents, formed about 300 million years ago (300 Ma). There is consensus that “top down” tectonic processes are probably responsible for supercontinent amalgamation. However, if top-down processes are applied to a 500 Ma paleogeography, they fail to yield Pangea in the correct configuration. As a corollary, we have no viable model for the coupling between processes in the Earth’s crust and its mantle, or for understanding long-term global change.

超级大陆的反复组装和分散深刻地影响了地球的演化。盘古大陆是这些超级大陆中最新的一个，形成于大约3亿年前（300 Ma）。有一个共识，“自上而下”的构造过程可能是负责超大陆合并。然而，如果将自上而下的过程应用于500 Ma的古地理，它们无法产生正确配置的盘古大陆。作为一个必然的结果，我们没有可行的模型来解释地壳和地幔过程之间的耦合，或者理解长期的全球变化。