contact Cover

 


2.3 Unconformity Geometries

These models show the effect of low susceptibility/low density cover overlaying a regular chequerboard pattern or uniform high susceptibility structures in the basement.
The basement is taken from the models in Appendix A.

Block models viewed from SW.

Click on the images to launch Noddy. A legend is provided at the end of this page. 

In order to use these history files you will also need to download the following three files! uncon2.dxf chequer.g00 chequer.g12
 
Link
Block
Gravity
Magnetics
Magnetics
Magnetics at Pole
Magnetics at Pole 1VD
Chequerboard pattern with no overlying cover
Open history with NoddyOpen FracViewer Movie 
View geology model
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Open gravity with Noddy
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Open magnetics with Noddy
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Open magnetics with Noddy
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Open magnetics at pole with Noddy
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Open magnetics at pole 1VD with Noddy
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Chequerboard pattern with low susceptibility/density overlying cover, unconformity dipping at 10° to East.
Open history with NoddyOpen FracViewer Movie 
View geology model
LOAD JPEG IMAGE
Open gravity with Noddy
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Open magnetics with Noddy
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Open magnetics with Noddy
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Open magnetics at pole with Noddy
LOAD JPEG IMAGE
Open magnetics at pole 1VD with Noddy
LOAD TIFF IMAGE
 
       
 
Open magnetics with Noddy
LOAD JPEG IMAGE

Image of the topography of unconformity surface used in next two models. Brighter areas have unconformity surface closer to land surface.
Total range is 250 m. 
 
 
 
Uniform high susceptibility/density rock with low susceptibility/density overlying cover, unconformity defined by buried land surface with 250 m topography.
Open history with NoddyOpen FracViewer Movie 
View geology model
LOAD JPEG IMAGE
Open gravity with Noddy
LOAD JPEG IMAGE
Open magnetics with Noddy
LOAD JPEG IMAGE
Open magnetics with Noddy
LOAD JPEG IMAGE
Open magnetics at pole with Noddy
LOAD JPEG IMAGE
Open magnetics at pole 1VD with Noddy
LOAD TIFF IMAGE
Chequerboard pattern with low susceptibility/density overlying cover, unconformity defined by buried land surface with 250 m topography.
Open history with NoddyOpen FracViewer Movie 
View geology model
LOAD JPEG IMAGE
Open gravity with Noddy
LOAD JPEG IMAGE
Open magnetics with Noddy
LOAD JPEG IMAGE
Open magnetics with Noddy
LOAD JPEG IMAGE
Open magnetics at pole with Noddy
LOAD JPEG IMAGE
Open magnetics at pole 1VD with Noddy
LOAD TIFF IMAGE


Key
Survey Parameters
Scales
cover
k = 10-4 r = 2.5
 
basement layer
k = 10-3 r = 2.5 & 3.5
 
image width
10,000 m
 
 
Inclination
50° or 90°
 
Intensity
50,000 or 70,000 gamma
 
Flight height
80 m
 
 
max min
max min
 
All models created using Noddy
Copyright © 1998 AGCRC & Mark Jessell

WWW conversion by Ian Brayshaw