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Reflection Seismic Data over the La Bajada Fault zone, New Mexico, USA

Reflection Seismic Data over the La Bajada Fault zone, New Mexico, USA. Mark Hamilton SAGE 2004. Outline. Introduction & reason for obtaining a velocity model How to obtain a velocity model The results of both models The interpretation of the final stacked reflection model.

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Reflection Seismic Data over the La Bajada Fault zone, New Mexico, USA

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  1. Reflection Seismic Data over the La Bajada Fault zone, New Mexico, USA Mark Hamilton SAGE 2004

  2. Outline • Introduction & reason for obtaining a velocity model • How to obtain a velocity model • The results of both models • The interpretation of the final stacked reflection model

  3. Topography map with seismic stations

  4. CMPsort at location 446

  5. CMP stack with 1400m/s constant velocity

  6. CMP stack with 2000m/s constant velocity

  7. Velocity model from constant velocity CMP stacks

  8. Velocity model from refraction data

  9. CMP stack with refraction velocity model

  10. CMP stack with velocity model derived from constant velocity stacks

  11. Butterworth BP 40Hz-120Hz La Bajada Profile

  12. Conclusions • Constant velocity stack model and refraction velocity model produced similar results • Surface position of fault is approximately at location 180 (~400 m from start of line) • Approximate throw of fault is 220m • Water table is at ~94m depth

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