During the entire underground bulk sampling program (Phases 1 to 3), underground mapping and sample batch changes were performed by Howe and Shore geologists following each of the drift developments on a daily basis.
During the Phase 3 program, a total of 59 small-tonnage resource evaluation (“RE”) samples were collected throughout the entire lateral drift network. The RE samples were 25 to 35 dry tonnes in size and was processed individually through Shore’s process plant. The RE samples were collected in order to compare diamond grade distributions obtained from the larger underground bulk samples and local LDD mini-bulk samples. Shore also collected four underground samples of the various kimberlite facies for metallurgical crushing test work.
Table 11.1: Total Star Kimberlite underground bulk sampling Statistics
Phase 1 Total Phase 2 Total
Phase 3 Phase 3 Phase 3 Phase 3 Total TOTAL
Drift Drift Drift RE Geotech
25,408.38 18,258.2 30,112.43 1,632.98 23.69 31,769.10 75,435.68****
*shaft metres not included in total **includes slashes
***includes slashes, RE and geotechnical samples ****includes all clean-up batches
Upon completion of the underground bulk sampling program on the Star Kimberlite, a combined total of 342 sample batches totalling 75,435.68 dry tonnes of kimberlite material was processed through Shore’s batch sampling process plant from both Shore’s 100 percent owned Star Kimberlite and the FALC-JV Star West bulk sampling programs. Tonnages include sampling of drift material, underground RE samples, geotechnical test samples and clean-up samples.
In the opinion of P&E, geological mapping of the underground openings is adequate to support Resource Estimation and mine planning activities.
11.1.2 UNDERGROUND KIMBERLITE SAMPLING PROGRAM
Procedures and Sample Security
Shore’s sampling methods and procedures were designed to optimize the precision and accuracy of the sample results in order to quantify the representative diamond grade within the sampled interval area. Efforts to reduce sample contamination during the underground mucking process were monitored by Shore and Howe geologists throughout the underground program.
Bulk Sample Kimberlite Storage, Sampling Method and Approach
Kimberlite was stored as individual batch sample piles within the dedicated storage facility areas. Each batch sample was identified with a sign denoting the drift it was from. All batch samples
P&E Mining Consultants Inc. NI 43-101 Technical Report No 159 Shore Gold Inc. - Star Diamond Project Resource Estimate Update
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