A new approach to revealing melting processes in the hidden deep Earth

揭示地球深处隐藏的融化过程的新方法

• 批准号: DE150100510
• 负责人: Dr Andrea Giuliani
• 金额: $ 25.66万
• 依托单位: Macquarie University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Early Career Researcher Award
• 财政年份: 2015
• 资助国家: 澳大利亚
• 起止时间: 2015-06-22 至 2019-03-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DE150100510
• 关键词: new; approach; revealing; melting; processes

Kimberlite magmas are very rich in volatiles (for example carbon dioxide and water); they are the major host of diamonds and provide the deepest samples from Earth's mantle. The primary compositions of these melts can provide unique information on the nature of the deep mantle. However, kimberlite melts mix and react with wall rocks on the way up, obscuring their primary composition. To see through these secondary processes, the project aims to use a novel approach integrating the study of melt inclusions in magmatic minerals with analysis of radiogenic and stable isotopes, and investigating reactions between kimberlite magmas and wall-rock fragments. The project aims to provide new understanding of the constraints on melting processes and recycling of crustal material in the deep mantle.

金伯利岩岩浆中含有丰富的挥发物（例如二氧化碳和水）;它们是钻石的主要宿主，并提供了地球地幔最深处的样品。这些熔体的主要成分可以提供关于深部地幔性质的独特信息。然而，金伯利岩熔体在上升的过程中与围岩混合并发生反应，模糊了它们的主要成分。为了了解这些次级过程，该项目旨在使用一种新的方法，将岩浆矿物中熔融包裹体的研究与放射性和稳定同位素的分析相结合，并调查金伯利岩岩浆与围岩碎片之间的反应。该项目的目的是使人们对深地幔中地壳物质的熔化过程和再循环的制约因素有新的认识。