1 / 28

Time (myr)

present. -65 my. Seismic Direct Dinosaur Indicator (DDI)?. ~. -90 my. Time (myr). Imaging Dinosaur Fossils by Seismic Tomography and GPR. Travis Crosby, Min Zhou, Dave Sheley, Scott Sampson , Paul Gettings and GT Schuster (U Utah) Craig Lipus (Geometrics). Outline.

phiala
Télécharger la présentation

Time (myr)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. present -65 my Seismic Direct Dinosaur Indicator (DDI)? ~ -90 my Time (myr)

  2. Imaging Dinosaur Fossils by Seismic Tomography and GPR Travis Crosby, Min Zhou, Dave Sheley, Scott Sampson, Paul Gettings and GT Schuster (U Utah) Craig Lipus (Geometrics)

  3. Outline • Motivation & Objective • S. Utah Hadrosaur Site • Seismic Tomography & GPR Experiments • Results & Problems

  4. Solution: Seismic/GPR DDI? Dinosaur Fossil Detection Problem: Where are dinosaurs? Paleontologists dig rocks!

  5. Outline • Motivation & Objective • S. Utah Hadrosaur Site • Seismic Tomography & GPR Experiments • Results & Problems

  6. Site Location Map

  7. View

  8. Seismic and GPR Survey Areas

  9. Hadrosaur Quarry

  10. Outline • Motivation & Objective • S. Utah Hadrosaur Site • Seismic Tomography & GPR Experiments • Results & Problems

  11. 0.5 m 12 m 24 geo/line 8 m Site Photographs

  12. 0.5 m 12 m 24 geo/line 8 m GPR Survey

  13. Outline • Motivation & Objective • S. Utah Hadrosaur Site • Seismic Tomography & GPR Experiments • Results & Problems

  14. 3-D Velocity Tomogram

  15. 11.2 ft Comparison with Adjacent Trench

  16. Shot Gather (400 Hz) 0 ms >80K Traveltime Picks 3D Traveltime Tomography 1-2 m Wavelength 60 ms

  17. Residual vs Iter. # 1.8 ms RMS Residual 1.6 ms 1 20 Iteration #

  18. N-S Vertical Section Tomograms 1.5 km/s 0 km/s 0 m 3 m 0 m 3m 1.5 km/s 0 km/s 0 m 3 m 1.5 km/s 0 km/s 0 m 12 m

  19. Radar Data Preliminary Results

  20. Outline • Motivation & Objective • S. Utah Hadrosaur Site • Seismic Tomography & GPR Experiments • Results & Problems

  21. Potential Problems Data Quality Control Anisotropy Attenuation

  22. Data QC:Edit SHOT # Geophone #

  23. Data QC: Reciprocity

  24. Attenuation? 0 ms 25 ms

  25. 1500 m/s 1500 -1500 -1500 m/s -2000 m/s 2000 m/s Anisotropy? Dx=0-2 m Dx=2-6 m Dx=0-12 m -2000 -2000 m/s 2000 -2000 m/s

  26. Depth Slice Tomograms 1.5 km/s 0 km/s 0 m 8 m Z=1 m 0 m 8 m 1.5 km/s 0 km/s Z=2 m 0 m 8 m 1.5 km/s 0 km/s Z=3 m 0 m 12 m

  27. Conclusions • Seismic Tomography not DDI • Seismic Tomography IDDI • GPR Preliminary • Near-Surface Problems: • Attenuation, Anisotropy, QC • Is a hadrosaur fossil low or Hi velocity?

  28. Differential GPS: cm Accuracy

More Related