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1.2 The effect on anomaly dimensions in magnetic data This sequence of images show the effect on anomaly amplitude and width of progressively burying a 1 km diameter sphere, two 200 m wide dykes and five 200 m on a side cubes by increments of 200 m.

The first row of images have the same absolute range, so this sequence shows the effect of depth on amplitude.
The second row of images on have been clipped to the maximum and minimum values for each image, so this sequence shows the effect of depth on wavelength.
Click on the images to launch Noddy. A legend is provided at the end of this page.

	3D view of geology, looking from SW. LOAD JPEG IMAGE

	Pseudo colour magnetic images at various depths measured from top
Link	200 m	400 m	600 m	800 m	1000 m
Effect of depth on amplitude	LOAD JPEG IMAGE	LOAD JPEG IMAGE	LOAD JPEG IMAGE	LOAD JPEG IMAGE	LOAD JPEG IMAGE
Effect of depth on wavelength	LOAD JPEG IMAGE	LOAD JPEG IMAGE	LOAD JPEG IMAGE	LOAD JPEG IMAGE	LOAD JPEG IMAGE

Key	Survey Parameters	Scales
plugs & dykes k = 10-2 background k = 0 image width 10,000 m	inclination -90° intensity 70,000 gamma flying height 200 m to 1000 m	2500 -200 max min

All models created using Noddy
Copyright © 1998-2002 AGCRC & Mark Jessell

WWW conversion by Ian Brayshaw