1. ReMi Applied Geophysics Spring Break 2010 Fariha Islam Gretchen Schmauder

2. Question Can the ReMi method be used to locate faults in the Reno Basin?

3. Area Geology NE trending faults Lacustrine, fluvial, and alluvial fan deposits Tertiary volcanic basement Active hot springs Abbott and Louie (2000)

4. Project Constraints Sedimentary cover can be greater than 1000 meters thick (Abbott and Louie, 2000). ReMi method typically used to depths less than 100 meters.

5. ReMi Method Surface wave velocity spectral analysis used to determine shallow earth structures –Typically used to determine IBC site classification, rippability, void detection, and fault mapping.

6. ReMi Method Fundamental Mode Rayleigh Wave Transect 3 along lakeside dr.

7. ReMi Survey Transect 4 along lakeside dr.

8. Survey location Scott et al. (2004)

9. 20 Transects along Manzanita Ln and adjacent streets

10. First order: shear velocity correlates to surficial geology

12. Frary (2009) Abbott and Louie (2000) Second order: shear velocity correlates to depth to bedrock

13. Third order: correlation between shear velocity and faults?

14. Conclusions Transect velocity models reflect regional geology and depth to bedrock Correlation between velocity models and faults is inconclusive Indication that the alluvium has a lower shear velocity due to faulting

15. Further Work Additional ReMi lines south of Manzanita Lane to verify higher velocity in alluvium Better constraint on area faulting

16. references