Gravity and magnetic methods - Geophysics for the Mineral Exploration Geoscientist - page 108

- 7400

gu

- 8700

a)

2400

gu

700

b)

Data before height corrections

- 6360

gu

Free-air correction

- 6470

c)

2950

-

gu

3650

-

d)

Free-air anomaly

- 2130

gu

Bouguer correction

- 2320

e)

115

gu

30

f)

Partial Bouguer anomaly

- 2100

gu

Terrain correction

- 2270

g)

Complete Bouguer anomaly

Figure 3.19 Height and terrain corrections applied to gravity data from Cripple Creek. The grey surface is topography, which has an
average elevation of around 3000 m and a variation of more than 800 m. The pseudocolours correspond with (a) observed gravity corrected
for tidal, drift and latitude effects, (b) free-air corrections, (c) FAA, (d) Bouguer corrections, (e) partial BA, (f) terrain corrections and
(g) complete BA. The images were created from open- le gravity and digital terrain data obtained from the United States Geological Survey.