How did Earth's early continental crust form? Insights from Western Australian cratons

地球的早期大陆地壳是如何形成的？

• 批准号: 2599949
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2599949
• 关键词: How; did; Earth; early; continental

The formation of Earth's first continents during the Archean eon is one of the major transformations that our planet has experienced throughout its history. Continent formation had a profound effect on the composition of both the Earth's surface, by kick-starting the release of elements necessary for the development of life in the oceans, and on the compositional evolution Earth's mantle. However, despite the crucial role of continental landmasses in Earth's evolution, the processes and geodynamic context in which they were formed and how these evolved during the Archean remain hotly debated. The granitoids forming the core of Earth's earliest continents hold the clues to resolving this debate. In this PhD project, the student will investigate the genesis of these granites using a set of novel, purpose-designed petrological and isotopic tools to test different models of continent formation.

在太古代地球第一个大陆的形成是我们的星球在其整个历史中经历的主要转变之一。大陆的形成对地球表面的组成产生了深远的影响，通过启动海洋生命发展所必需的元素的释放，以及对地球地幔的组成演变。然而，尽管大陆板块在地球的演化中扮演着重要的角色，但它们形成的过程和地球动力学背景以及它们在太古代期间如何演化仍然存在激烈的争论。形成地球最早大陆核心的花岗岩类为解决这一争论提供了线索。在这个博士项目中，学生将使用一套新颖的，专门设计的岩石学和同位素工具来研究这些花岗岩的成因，以测试不同的大陆形成模型。