Convert Oriented Core Angles

Use the DH-Data > Convert Oriented Core Angles menu option (geogxnet.dll(Geosoft.GX.DrillHole.ConvertOrientedCoredToDipDir;Run)*) to convert the oriented core alpha and beta angles to absolute dip and dip-direction values.

Convert Orientation to Dip and Dip Direction dialog options

Alpha channel code

Select the channel code corresponding to the alpha angle from the values in the drop-down list.

A channel code consists of the database name in square brackets, followed by the channel name; for instance, if the "Alpha" channel is in the "Tutorial_Structure.gdb" database, then the corresponding channel code is "[Structure] Alpha".

Script Parameter: DH.ALPHA_CHANCODE

Beta channel code

Select the channel code corresponding to the beta angle from the values in the drop-down list.

Script Parameter: DH.BETA_CHANCODE

Absolute dip angle channel

Enter the name for the output absolute dip angle channel. This is the angle by which the structure dips below true horizontal.

Script Parameter: DH.DIP_CHAN

Absolute dip direction channel

Enter the name for the output absolute dip-direction channel. This is azimuth angle of the horizontal projection of the dip vector.

Script Parameter: DH.DIR_CHAN

Core reference for beta

Select either "Top" or "Bottom" for the location of the core reference line, from which the beta angle is measured.

Script Parameter: DH.HOLE_REF

Application Notes

Structural measurements of drill core can be recorded using various conventions, usually either "absolute" or "relative" to the hole orientation. Absolute measurements are reported using real-world compass orientations, e.g. as dip & azimuth, dip & dip direction, or sometimes as dip & strike. (Note that azimuth and dip direction are the same direction, but just using different terms.) Measurements that are "relative to hole" are also sometimes called Alpha and Beta angles. These measurements are recorded "relative to the drill hole" and are not oriented in true compass locations. These values can be converted to absolute values using this tool.

*The GX tool will search in the "...\Geosoft\Desktop Applications \gx" folder. The GX.Net tools, however, are embedded in the geogxnet.dll located in the "...\Geosoft\Desktop Applications \bin" folder. If running this GX interactively, bypassing the menu, first change the folder to point to the "bin" folder, then supply the GX.Net tool in the specified format.