Gravity and Magnetic Methods
Presented By:
Josh Beckwith
Alison Dorsey
Janina Stampahar
Paul Schwering
GPH 492/692 FINAL PROJECT
California Wash & Astor Pass,Nevada
Gravity Data Acquisition• Survey control established with precision
theodolite measurements
• Gravity measured with precision L&R g-meter
Magnetic Data Acquisition• Utilized two Scintrex precision
magnetometers, one stationary base unit, one roving unit
• Survey control established with hand-held Garmin GPS unit
Survey AreasSurvey Areas
CaliforniaCaliforniaWashWash
Astor PassAstor Pass
California Wash
Survey AreaTo LasVegas
CALIFORNIA
WASH
CALIFORNIA
WASH
Gravity Profile
Easting (m)
CALIFORNIA
WASH
65 65
S=0.0005
S=0.0002
Astor PassAstor Pass
‘
116°C
550 m
Tufa Tower
93°C
94°C 87°C
79°C
90°C
1 km
The Needles
Astor Pass
Tufa Tower
Aerial Views Face ~E
W E
N
Regional Geology Map w/ Gravity Contours(from Dr. Jim Faulds)
Survey AreaSurvey Area
Astor Pass Magnetic Data
Astor Pass Magnetic Data
Astor Pass Gravity Data
Astor Pass Gravity Data
Northing (m)
ASTOR
PASS
70 7080 85
QUESTIONS?