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

本研究将处理三维地震的确定 南部大盆地速度结构 地震网络，有效地覆盖了内华达州南部。 的 该技术涉及P和S地震波走时反演 从当地的事件和恐怖主义中。 地质测绘显示， 上地壳伸展是相当不均匀的， 与实际上没有延伸的树相邻的高度延伸的树。 这种伸展是如何在中地壳和下地壳表现出来的 和上地幔仍有争议 这一分析预计 将10公里大小的结构元素分解为 深度约300公里。 这种分析关系到 盆岭区深部正断层活动。 这项研究是国家地震灾害的一个组成部分 减少方案。

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.