1 / 13

Gravity

Gravity. Janice Kukuk Rob Ghigieri Ross Whitmore. http://sciencefun.wordpress.com/2008/04/. Takehome Message. Bolstered NE portion of the Truckee Meadows Basin (TMB) Gravity dataset Hidden Valley Sub-basin. Purpose. Learn how to use a Gravimeter Fill data gaps in TMB dataset

olympia-castaneda
Download Presentation

Gravity

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. Gravity Janice Kukuk Rob Ghigieri Ross Whitmore http://sciencefun.wordpress.com/2008/04/

  2. Takehome Message • Bolstered NE portion of the Truckee Meadows Basin (TMB) Gravity dataset • Hidden Valley Sub-basin

  3. Purpose • Learn how to use a Gravimeter • Fill data gaps in TMB dataset • Profile a smaller sub-basin in Hidden Valley

  4. Location

  5. Methods • LaCost and Rhomberg Gravimeter • Grav2d • GM-SYS • Trimble GPS • Theodolite

  6. Results for Prater Grav2d W E GM-SYS ~14 mGal anomaly Distance in km

  7. Results for Hidden Valley Grav2d W E Tolerance 2 mGal Density contrast-0.33 g/cc GM-SYS -6 mGal Anomaly Distance in km

  8. Comparison of results Prater W E (Modified from Widmer et al., 2007)

  9. Comparison of results Hidden Valley W E

  10. Error • Non-equilibrated spring • Terrain corrections • Elevation error • Inconsistent temperature • User error • Instrument drift

  11. Future Work • Verification of Hidden Valley anomaly • Completion of D’Andrea pkwy line to bolster dataset

  12. Takehome Message • Bolstered NE portion of the Truckee Meadows Basin (TMB) Gravity dataset • Hidden Valley Sub-basin

  13. References • Abbot, R.E., and Louie, J.N., 2000, Depth to bedrock using gravimetry in the Reno and Carson City, Nevada, Area basins: Geophysics, V. 65, p. 430-450. • Anderson, J., Su, F., Zeng, Y., 1999, Seismic Hazards in the vicinity of Las Vegas and Reno: Final Technical Report GS# 1434-HQ-97- GR-03044 (paper copy, 15 p.) • Telford, W.M., Geldhart, L.P., and Sheriff, R.E., 1990, Applied Geophysics: New York, Cambridge University Press, 770 p. • Widmer, M.C., Cashman, P.H., Benedict, F.C., Trexler, J.H., 2007, Neogene through Quaternary stratigraphy and structure in a portion of the Truckee Meadows Basin; a record of recent tectonic history: Geological Society of America Abstracts with programs, v. 39, no. 4 p.9

More Related