Collaborative Research: Seismic Investigations of the Continental Lithosphere and Subducting Plate Beneath Central Peru

合作研究：秘鲁中部下方大陆岩石圈和俯冲板块的地震调查

• 批准号: 9019185
• 负责人: J. Arthur Snoke
• 金额: $ 7.15万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-15 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019185&HistoricalAwards=false
• 关键词: Collaborative; Research; Seismic; Investigations; Continental

This research is to analyze body wave phases recorded over a period of several months by a digital three-component local array operated in the Subandean Province and East Peru Basin above the zone of flat subduction and resubduction in the central Andes. The analysis will include a systematic interpretation and inversion of body wave seismograms making use of a recently developed technique for the deterministic calculation of synthetic seismograms. Dipping plate structures outside the region of flat subduction will be studied by means of 3-D ray tracing routines which incorporate conversions and reflections at first-order discontinuities. The Andean system offers unique opportunities for the study of many fundamental problems of continental dynamics including earthquake hazard, and the fine structure and properties of the subducting slab, the overriding lithosphere and the interface between them. This research is a component of the National Earthquake Hazard Reduction Program.

这项研究旨在分析在安第斯山脉中部平坦俯冲和再俯冲地带上方的苏班丁省和东秘鲁盆地使用的数字三分量局域阵列在几个月的时间内记录的体波相位。分析将包括利用最近开发的用于合成地震图确定性计算的技术对体波地震图进行系统的解释和反演。平面俯冲区域以外的倾斜板结构将通过三维射线追踪程序进行研究，该程序包含了一级不连续面上的转换和反射。安第斯系为研究大陆动力学的许多基本问题提供了独特的机会，包括地震灾害，以及俯冲板块、上覆岩石圈和它们之间界面的精细结构和性质。这项研究是国家减少地震灾害计划的一部分。