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2.2.1 Variation in fault geometry


This sequence shows a number of different fault styles.

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Link
Block
Gravity
Magnetics
Magnetics
Magnetics at Pole
Magnetics at Pole 1VD
Normal Fault

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Rotational Fault

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In this case the fault produces a wedge of high density and high susceptibility material sloping to the East, with an increasing gravity response as the thickness increases, but a very localised magnetic high associated with the sharp change in susceptibilities.
Growth Fault

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In this model the middle, low susceptibility unit is significantly thickened due to the fault being active during deposition.
Fault Inversion

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This model shows the effect of late shortening on an early growth fault.
Thrust Ramp Fault

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In this model a pair of thrust ramps have produced an antiformal stack.
Elliptical Normal Fault

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The magnitude of the slip vector decays away from centre of elliptical fault surface.
Normal Fault Set

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Key
Earth's Magnetic Field
Scales
layer
r = 3.5k = 10-2
background
r = 2.5k = 10-4
width of image
10,000 m
Inclination
50° or 90°
Intensity
50,000 or 70,000 gamma
Flying height
80 m

max



min

max



min

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Copyright © 1998-2002 AGCRC & Mark Jessell

WWW conversion by Ian Brayshaw