You are hereGold Prospecting & Record Keeping
Gold Prospecting & Record Keeping
Rec ord Keeping: Accurate, systematic records must be kept for proper placer evaluation. As an example, data that must be recorded on a log sheet when churn drilling a placer gold deposit includes:
- Name of property
- Location
- Date
- Drill-hole line number
- Hole number
- Hole collar elevation
- Time (the time is given for each bailing. A summary of time consumed in drilling, pulling, moving, repairs, etc.)
- Depth of the drive shoe for each sample interval
- Depth of pumping for each drive or sample interval
- Total hole depth
- Core rise in the pipe for each drive
- Core left in the pipe after pumping, i.e., the plug thickness
- The length of core removed
- Volume bucket measurement
- Classification of colours (count the number of No. 1, 2, and 3 colours)
- Estimate the gold weight based on the colour count
- Formation (note the visible physical characteristics of the formation being drilled)
- Depth and nature of overburden
- Labour used
- Depth of the pay gravel
- Depth to bedrock
- Nature of bedrock
- Thickness of pay zone
- Diameter of the drive shoe
- Theoretical volume of core removed
- Volume of core removed
- Weight of gold recovered in milligrams
- Fineness of gold
- Drive shoe constant used in calculations
- Value in milligrams, grams or cents per cubic meter (cubic yard)
- Price of gold used in calculations if cents per volume are used
- Signature of the driller, panner, and helper
- It is essential that detailed records are kept as they will be used to determine the value of the deposit as well as to determine its minability. Information included in the drill logs will also be used in selecting a mining method.
