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

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

• Mark Hamilton
• SAGE 2004

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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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Topography map with seismic stations
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CMPsort at location 446
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CMP stack with 1400m/s constant velocity
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CMP stack with 2000m/s constant velocity
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Velocity model from constant velocity CMP stacks
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Velocity model from refraction data
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CMP stack with refraction velocity model
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CMP stack with velocity model derived from
constant velocity stacks
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Butterworth BP 40Hz-120Hz La Bajada Profile
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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