Seismic wavespeeds and attenuation in upper-mantle rocks: a laboratory study of the effect of partial melting

上地幔岩石中的地震波速和衰减：部分熔融效应的实验室研究

• 批准号: ARC : DP0208127
• 负责人: Ian Jackson
• 金额: $ 18.4万
• 依托单位: Australian National University Institute of Advanced Studies
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2002
• 资助国家: 澳大利亚
• 起止时间: 2002-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://researchdata.edu.au/seismic-wavespeeds-attenuation-partial-melting/72017
• 关键词: Seismic; wavespeeds; attenuation; upper; mantle

Seismic wavespeeds and attenuation in upper-mantle rocks: a laboratory study of the effect of partial melting. The influence of partial melting on the seismic properties of the Earth's upper mantle will be explored through a laboratory study. Synthetic rock specimens consisting of the upper-mantle mineral olivine and a small proportion of basaltic magma will be prepared and their grain-scale melt distribution will be characterised. The seismic properties of these materials will be measured at high temperatures and seismic frequencies with novel locally developed equipment. Comparison with melt-free equivalents will allow the influence of the added magma to be quantified, allowing robust interpretation of seismological models of Earth structure with implications for its chemical and dynamical evolution.

上地幔岩石中的地震波速度和衰减：部分熔融影响的实验室研究。部分熔融对地球上地幔地震性质的影响将通过实验室研究来探索。将制备由上地幔矿物橄榄石和少量玄武岩岩浆组成的合成岩石样品，并描述它们的粒度熔体分布。这些材料的地震性能将用当地开发的新设备在高温和地震频率下进行测量。与不熔融的等价物进行比较，将使添加的岩浆的影响得以量化，从而能够有力地解释地球结构的地震学模型，以及对其化学和动力学演化的影响。