3.18 Rock Properties Definition

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This window can be accessed from the Stratigraphy Definition Window or when defining an event that generates new lithologies (dykes, plugs, unconformities). Within this window you can define the name, alteration properties, geophysical properties and thickness of a given lithology.

Stratigraphic Thicknesses

For stratigraphically defined units (ie the base stratigraphy and unconformities, and not dykes or plugs), the thickness of the unit is defined as follows:

a) The top-most unit extends infinitely upwards in the positive Z direction, and the base of this unit is defined by the Height parameter.

b) Middle units are defined by their Width (thickness).

c) The lowest unit extends down (in the negative Z direction) from the base of the unit above it to infinity.

 

Rock Properties Window

GROUP

NAME

FUNCTION

Geology

Name

User Selectable name, also a menu for pre-defined rock properties from the Rock Property Database (See section 2.8.4)

 

Width

Thickness of stratigraphically defined lithologies (Except topmost or lowermost unit in a sequence)

 

Height

Level of base of topmost unit in a stratigraphically defined lithology

 

Alter

Alows this unit’s geophysical properties to be affected by alteration haloes, if not checked the original rock propoerty values will be retained during alteration events.

Susceptibility

Anisotropy

Defines susceptibility to be anisotropic

 

Magnetic Susceptibility X

Magnitude of Anisotropy in user defined units in the X direction (or for all 3 directions if Anisotropy is not checked)

 

Magnetic Susceptibility Y

Magnitude of Anisotropy in user defined units in the Y direction (only if Anisotropy is checked)

 

Magnetic Susceptibility Z

Magnitude of Anisotropy in user defined units in the Z direction (only if Anisotropy is checked)

 

Dip

Dip of XY plane of Anisotropy

 

Dip Direction

Dip Direction of XY plane of Anisotropy

 

Pitch

Pitch of X direction in XY plane of Anisotropy

Density

Density

Density of lithology

Remanence

Remanence

Defines a remanent component of magnetisation

 

Declination

Declination of remanent vector

 

Inclination

Inclination of remanent vector

 

Intensity

Intensity of remanent vector

Define Colour

  

Allows colour of unit to be altered