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Core Orientator-Rocket Launcher
Core Orientator-Rocket Launcher
Drill Core Structural Orientations using “alpha and beta” angles
The following measurements are required:
• Alpha and beta angles of the structures
• The dip and azimuth of the drill hole
A computer program such as DIPS or the GEOTECH module in GEOACCESS 2000 is used to calculate (and plot) the True Dip and True Dip Direction of the structure.
The diagram in PDF shows how to measure alpha and beta angles:
When logging core for which the orientations are suspect, note the different intervals of core for which you've used particular orientations; e.g. for interval 425 to 480 metres, you used the "Bottom of core" orientation mark at 456m depth.
Be comprehensive with the structure logging (but not too extravagant). We are trying to determine if there are consistent sets of structures. There is therefore no need to measure every feature. If there are clearly a number of structures of the same type, in the same overall orientation, then take representative measurements.
The following measurements are required:
• Alpha and beta angles of the structures
• The dip and azimuth of the drill hole
A computer program such as DIPS or the GEOTECH module in GEOACCESS 2000 is used to calculate (and plot) the True Dip and True Dip Direction of the structure.
The diagram in PDF shows how to measure alpha and beta angles:
When logging core for which the orientations are suspect, note the different intervals of core for which you've used particular orientations; e.g. for interval 425 to 480 metres, you used the "Bottom of core" orientation mark at 456m depth.
Be comprehensive with the structure logging (but not too extravagant). We are trying to determine if there are consistent sets of structures. There is therefore no need to measure every feature. If there are clearly a number of structures of the same type, in the same overall orientation, then take representative measurements.
