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 PI 提议对深部地震的性质进行跨学科研究。 这项研究将测试所提出的相变诱发断层机制的有效性，该机制伴随着俯冲岩石圈板片中从橄榄石到尖晶石的亚稳态相变。 将继续进行实验室微观结构和流变实验以及地震学研究，并将通过实验室（转变引起的不稳定性的微观力学建模）和地球尺度（大规模热和力学建模）的地球动力学建模研究来加强。 了解深部地震的破坏机制对于确定俯冲板片的内部矿物结构和确定地幔对流的驱动力具有重要意义。 ***