CSEDI: Experimental, Seismological, and Modeling Study of the Rheology, Structure, and State of Stress of Deep Subducting Slabs

CSEDI：深俯冲板片流变、结构和应力状态的实验、地震学和建模研究

• 批准号: 9601979
• 负责人: Heidi Houston
• 金额: $ 3.5万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9601979&HistoricalAwards=false
• 关键词: CSEDI; Experimental; Seismological; Modeling; Study

96-01979 Houston The PIs propose an interdisciplinary study of the nature of deep earthquakes. This research will test the validity of the proposed mechanism of transformation-induced faulting that accompanies the metastable phase change from olivine to spinel in subducting lithospheric slabs. Laboratory microstructural and rheological experiments and seismological studies will be continued and will be enhanced by geodynamic modeling studies at both laboratory (micromechanical modeling of the transformation-induced instability) and earth scales (large-scale thermal and mechanical modeling). Understanding the failure mechanism of deep earthquakes is important for determining the internal mineralogical structure of subducting slabs and identifying the driving forces for convection in the earth's mantle. ***

96-01979 休斯顿 PI建议对深源地震的性质进行跨学科的研究。 这项研究将测试的有效性，所提出的机制的转换引起的断层，伴随着亚稳相变从橄榄石尖晶石在俯冲岩石圈板。 将继续进行实验室微观结构和流变学实验以及地震学研究，并将通过实验室（变形引起的不稳定的微观力学模型）和地球尺度（大尺度热和力学模型）的地球动力学模型研究予以加强。 了解深源地震的破坏机制对于确定俯冲板块的内部矿物学结构和识别地幔对流的驱动力是重要的。 ***