CSEDI: Experimental, Seismological and Modeling Study of theRheology, 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、地震学和模拟研究

• 批准号: 9629472
• 负责人: Chris Marone
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 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 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9629472&HistoricalAwards=false
• 关键词: CSEDI; Experimental; Seismological; Modeling; Study

96-29472 Marone 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. ***

96-29472 Marone PIS提出了一项关于深层地震本质的跨学科研究。 这项研究将测试提出的转化诱导断层机制的有效性，该机制伴随着岩石圈板的俯冲中从橄榄石到尖晶石的亚稳态变化。 实验室的微观结构和流变学实验以及地震学研究将继续进行，并通过实验室（转化引起的不稳定性的微观力学建模）和地球尺度（大规模热和机械建模）的地球动力学建模研究来增强。 了解深层地震的破坏机制对于确定俯冲板的内部矿物学结构和识别驱动力在地球地幔中的对流很重要。 ***