DRILL CORE BULK SAMPLING
Eighteen bulk samples from drill core were submitted to SGS Lakefield in late 2007 for the following tests:
crushing and riffling;
x-ray diffraction analysis of the fine and as-received material;
full screen analysis and Malvern Mastersizer analysis;
determination of specific gravity using the pycnometer method;
determination of clay cation exchange capacity and clay exchangeable cation analysis;
preparation of simulated process water for analysis;
dry-screening to remove -300µm material; and
preparation of slurry for pH and conductivity analysis.
The results from this test work have been provided by SGS Lakefield and will be used in the design of mineral processing facilities.
Four underground samples of kimberlite were submitted for a pilot crusher test conducted by Mesto Minerals at the request of Shore. The purpose of the testing was to investigate the use of a High Pressure (“HP”) cone to crush 200 mm kimberlite to 75 mm. The samples were used as the initial feed in the crushing circuit.
There were two main areas of interest in the testing. The first was the reduction and capacity of kimberlite material in a larger HP cone. The second was the flow through the crusher, as kimberlite can be sticky. For the most part, there was no noticeable clogging of samples and tonnage capacity was in the acceptable range for kimberlites. All tests were smooth, and the circuit was balanced throughout. Results were provided by Metso Minerals.
ORE DRESSING STUDY
A total of 1,992 samples were submitted to SGS Lakefield for ore dressing study between October, 2005 and December, 2007, of which 563 samples were submitted for the T10 test, 569 for the JKTech Ta test and 851 for the UCS test. Apparent bulk density determinations were performed as part of the three test procedures. Some samples were not tested because they were too light, too fine or broken.
The ore dressing study generated tremendous amounts of grindability and communition data, which is used by Shore to develop a geometallurgical understanding of the deposit and optimize the process plant design.
With regard to T10 testing, an abbreviated version of standard JKTech drop-weight test was utilized. The results indicate that the Star Kimberlite is very soft with respect to resistance to impact and abrasion breakage. The kimberlite is amenable to communition by impact breakage i.e. Jaw, gyratory, cone crushers. The data from this test will be incorporated into mine and processing plant planning and design.
P&E Mining Consultants Inc. NI 43-101 Technical Report No 159 Shore Gold Inc. - Star Diamond Project Resource Estimate Update
Page 74 of 109