Diamonds in ophiolite: recycling deep mantle into supra-subduction zones

蛇绿岩中的钻石：将深部地幔回收到超俯冲带

• 批准号: DP190100814
• 负责人: Prof Jonathan Aitchison
• 金额: $ 21.72万
• 依托单位: The University of Queensland
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2019
• 资助国家: 澳大利亚
• 起止时间: 2019-06-30 至 2023-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP190100814
• 关键词: Diamonds; ophiolite; recycling; deep; mantle

This project aims to investigate whether the discovery of diamonds in oceanic rocks, known as ophiolites, is a global phenomenon. Even half a century after the introduction of plate tectonic theory, significant knowledge gaps remain regarding the fate of subducted lithosphere and Earth processes deep within the mantle. This project will use Australasian examples to test the hypothesis that diamonds are ubiquitous in the mantle and occur widely in ophiolites. Results will have major implications for our understanding of how ocean crust grows and how rocks in the upper mantle form, as well as providing insight into how organic carbon is cycled from the seabed deep into the mantle before being returned back to Earth's surface.

该项目旨在调查在海洋岩石（称为蛇绿岩）中发现钻石是否是一种全球现象。即使在板块构造理论提出半个世纪后，关于俯冲岩石圈的命运和地幔深处的地球过程仍然存在重大的知识差距。该项目将使用澳大利亚的例子来检验钻石在地幔中普遍存在并且广泛存在于蛇绿岩中的假设。研究结果将对我们理解洋壳如何生长以及上地幔岩石如何形成产生重大影响，并深入了解有机碳如何从海底深处循环到地幔然后返回地球表面。