Behavior of chalcophile elements in subduction zone processes

俯冲带过程中亲铜元素的行为

• 批准号: 288061031
• 负责人: Professor Dr. Roman Botcharnikov, Ph.D.
• 金额: --
• 依托单位: Arbeitsgruppe Petrologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/288061031?language=en
• 关键词: Behavior; chalcophile; elements; subduction; zone

The main objective of this project is to propose a quantitative description of the chalcophile element geochemical behavior in the processes of subduction zone evolution by creating a quantitative link between dehydration/melting of the slab, partial melting of the mantle wedge, and magma evolution in the crust. This objective will be achieved by a combination of innovative approaches in geochemistry, experimental petrology and geochemical modelling. The innovative ways to progress in the understanding of subduction zones are required to overcome current challenges and lack of data in the investigations of natural materials and in the experimental simulations as well as to reassess and extend existing geochemical models. To achieve these goals, I propose a multidisciplinary approach which combines (1) the geochemical and petrological investigations of natural samples from arc systems, (2) the experimental determination of chalcophile element behavior at conditions simulating subduction zone environment as well as (3) the forward modelling of subduction zone processes. The outcome from these tasks will open a novel detailed view on the geochemistry of chalcophile elements in subduction zones covering a long-standing gap in our knowledge and will provide precise geochemical proxies needed for tracing contribution from different sources, interpreting subarc processes and estimating element budget and cycling.

该项目的主要目的是通过建立板块脱水/熔融、地幔楔体部分熔融和地壳岩浆演化之间的定量联系，对俯冲带演化过程中亲硫元素的地球化学行为进行定量描述。这一目标将通过在地球化学、实验岩石学和地球化学模型方面的创新方法相结合来实现。需要在了解俯冲带方面取得进展的创新方法，以克服目前在自然材料调查和实验模拟中的挑战和数据缺乏，以及重新评估和扩展现有的地球化学模型。为了实现这些目标，我提出了一种多学科的方法，它结合了(1)来自弧系的自然样品的地球化学和岩石学研究，(2)模拟俯冲带环境条件下亲磷元素行为的实验测定，以及(3)俯冲带过程的正演模拟。这些任务的结果将为俯冲带亲硫元素的地球化学开辟一种新的详细视角，涵盖我们知识中的一个长期缺口，并将提供追踪不同来源的贡献、解释弧下过程和估计元素预算和旋回所需的精确地球化学指标。