contact Cover

 


1.3 A cross section through the gravity and magnetic fields

These models show a vertical section through the gravity and magnetic fields, and their respective derivatives. The section is an East-West section drawn through the middle of the models used in sections 1.1 and 1.2. Each section (at equal horizontal and vertical scale) shows how the intensity of the field decays with height above the body, and at what height the distinct anomalies associated with each body merge with each other.
Notice the correlation between the first vertical derivative of the gravity field and the total field magnetics.


Click on the images to launch Noddy. A legend is provided at the end of this page.
 
       
 
Open history with Noddy Open FracViewer Movie
 
 
East-West sections with altitude variations from 0 m to 2000 m
Gravity
0 m
200 m
400 m
600 m
800 m
1000 m
1200 m
1400 m
1600 m
1800 m
2000 m
 
Open gravity with Noddy
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Gravity
First Vertical Derivative
0 m
200 m
400 m
600 m
800 m
1000 m
1200 m
1400 m
1600 m
1800 m
2000 m
 
Open gravity 1VD with Noddy
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Magnetics
0 m
200 m
400 m
600 m
800 m
1000 m
1200 m
1400 m
1600 m
1800 m
2000 m
 
Open magnetics at pole  with Noddy
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Magnetics
First Vertical Dertivative
0 m
200 m
400 m
600 m
800 m
1000 m
1200 m
1400 m
1600 m
1800 m
2000 m
 
Open magnetics at pole 1VD with Noddy
LOAD JPEG IMAGE
Geology
 
View geology model
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Key
Survey Parameters
Scale
plugs & dykes
r = 1 k = 10-2
 
background
r = 0 k = 0
 
image width
10,000 m
 
image height
2,000 m
 
 
inclination
90°
 
intensity
70,000 gamma
 
flying height
0 m to 2000 m
 
 

max

min

 

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

WWW conversion by Ian Brayshaw