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2.1.2b Variation in fold plunge direction of sinusoidal folds (continued)

2.1.2n  


This sequence shows the affect of a sinusoidal fold in a 200 m thick layer, plunging to the North. Other orientations are not shown as reduced to the pole images would simply vary by rotation. The images show the variation in display formats between grey scale and pseudo-colour look up tables, and colour contours, and the differences between folds at inclinations of 50° and 90°, together with first vertical derivative images at the pole.

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

Link
Grey Scale
Pseudo Colour
Contours
Folds plunging to 000 (North) -- Gravity

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Notice the strong asymmetry of the anomaly in north-south sections, and the asymmetry between the anticlines and synclines in the south.
Folds plunging to 000 (North) -- Magnetics at 50°

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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Notice the asymmetry of the anomaly in north-south sections, and the asymmetry between the anticlines and synclines in the south.
Folds plunging to 000 (North) -- Magnetics at 90°

Open history with NoddyOpen FracViewer Movie
View geology model

LOAD JPEG IMAGE

Open gravity with Noddy

LOAD JPEG IMAGE

Open magnetics with Noddy

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Notice the weaker asymmetry of the anomaly in north-south sections, and the asymmetry between the anticlines and synclines in the south.
Folds plunging to 000 (North) -- Magnetics at 90° First Vertical Derivative

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

Notice the weaker asymmetry of the anomaly in north-south sections.

Key
Survey Parameters
Scales
layer
r = 1k = 10-2
background
r = 0k = 0
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 © 1998-2002 AGCRC & Mark Jessell

WWW conversion by Ian Brayshaw