A Collaborative Investigation to Determine the Three- Dimensional Elastic Wave Velocity Structure of the Crust and Upper Mantle Beneath the So. Great Basin

确定地壳和上地幔三维弹性波速度结构的合作研究。

• 批准号: 9117705
• 负责人: Steven Roecker
• 金额: $ 3.83万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117705&HistoricalAwards=false
• 关键词: Collaborative; Investigation; Determine; Three; Dimensional

This research will deal with determination of the 3-D seismic velocity structure in the area of the Southern Great Basin Seismic Network, effectively covering southern Nevada. The technique involves inversion of P and S seismic wave travel times from local events and teleseisms. Geologic mapping reveals that the upper crustal extension has been quite heterogeneous, with highly extended terranes adjoining virtually unextended terranes. How this extension is manifested in the middle and lower crust and upper mantle remains in dispute. This analysis is expected to resolve structural elements of about 10 km size down to approximately 300 km depth. This analysis bears on the nature of active normal faulting at depth in the Basin and Range province. This research is a component of the National Earthquake Hazard Reduction Program.

这项研究将确定南大盆地地震台网区域的 3-D 地震速度结构，有效覆盖内华达州南部。 该技术涉及根据本地事件和远震来反演 P 和 S 地震波传播时间。 地质测绘显示，上地壳伸展相当不均匀，高度伸展的地体毗邻几乎未伸展的地体。 这种延伸如何在中、下地壳和上地幔中表现出来仍然存在争议。 该分析预计将解析约 10 公里大小至约 300 公里深度的结构单元。 该分析与盆岭省深层活动正断层的性质有关。 这项研究是国家地震减灾计划的一部分。