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Gravity and Magnetic Methods

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  1. GPH 492/692 FINAL PROJECT Gravity and Magnetic Methods California Wash & Astor Pass,Nevada Presented By: Josh Beckwith Alison Dorsey Janina Stampahar Paul Schwering

  2. Gravity Data Acquisition • Survey control established with precision theodolite measurements • Gravity measured with precision L&R g-meter

  3. Magnetic Data Acquisition • Utilized two Scintrex precision magnetometers, one stationary base unit, one roving unit • Survey control established with hand-held Garmin GPS unit

  4. Astor Pass Survey Areas California Wash

  5. California Wash Survey Area To Las Vegas

  6. CALIFORNIA WASH

  7. CALIFORNIA WASH

  8. Gravity Profile Easting (m)

  9. CALIFORNIA WASH 65 65 S=0.0005 S=0.0002

  10. Astor Pass N Aerial Views Face ~E 1 km The Needles Astor Pass Tufa Tower ‘ W E 87°C 94°C 79°C 550 m Tufa Tower 90°C 93°C 116°C

  11. Regional Geology Map w/ Gravity Contours (from Dr. Jim Faulds) Survey Area

  12. Astor Pass Magnetic Data

  13. Astor Pass Magnetic Data

  14. Astor Pass Gravity Data

  15. Astor Pass Gravity Data Northing (m)

  16. ASTOR PASS 70 70 80 85

  17. QUESTIONS?