Three-dimensional flow, temperature and melting distributions in mantle subduction zones

地幔俯冲带三维流动、温度和熔融分布

• 批准号: LX0455722
• 负责人: Prof Ross Griffiths
• 金额: $ 2.66万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Linkage - International
• 财政年份: 2004
• 资助国家: 澳大利亚
• 起止时间: 2004-07-20 至 2007-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LX0455722
• 关键词: Three; dimensional; flow; temperature; melting

We will predict spatial distributions and time evolution of temperature and magma production in subduction zones, where cold oceanic plates sink into the Earth's mantle, recycle crust and sediments, and generate volcanic arcs. Three-dimensional laboratory experiments, including 3-D flow visualization and high-resolution temperature measurements, will model slab segments, different rates and modes of subduction and upward transport of melt. Ocean trench migration (?rollback? subduction) is of special interest because it gives patterns of temperature and vertical motion most conducive to melting. Results will be used to interpret geochemical and seismic data from the Tonga subduction zone in the South Pacific.

我们将预测俯冲带中温度和岩浆产生的空间分布和时间演化，在俯冲带中，冷的海洋板块沉入地幔，回收地壳和沉积物，并产生火山弧。三维实验室实验，包括三维流动可视化和高分辨率温度测量，将模拟板段，不同的速度和模式的俯冲和向上运输的熔体。海沟迁移（？回滚？俯冲）是特别感兴趣的，因为它给出了最有利于融化的温度和垂直运动模式。研究结果将用于解释南太平洋汤加俯冲带的地球化学和地震数据。