Information regarding the details of Shore’s surface, underground drilling and LDD programs is available in Eggleston et al. (2008) and Leroux (2008a). This section of the current report draws heavily on these reports and the reader is referred to these documents for greater detail.
SURFACE CORE DRILLING PROGRAM
Surface core drilling completed in 2008 was part of three drilling programs (Table 10.1): exploration drilling to the north of FALC; geotechnical and geohydrological drilling along the periphery of the Star Kimberlite; and one infill core hole that acted as a pilot hole to a LDD hole.
Table 10.1: 2008 surface core drilling statistics
Star West Geotech/Hydrogeology
In March, 2008 two exploration core holes were drilled totalling 499.9 m. Encore was contracted to carry out the PQ surface core drilling program. One petroleum drill rig with auxiliary mudplants was utilized to carry out the program. The same drill rig was used for the removal of drill casing and inserting 3 inch (or 7.68 cm) diameter interconnected PVC piping for downhole geophysical logging and surveying.
Number of Core
The goal of the exploration core drilling program was to test the GeoTEM targets that were previously defined by Fugro. No kimberlite was intersected in this drilling.
In October through November, 2008 Shore completed a core drilling program around the periphery of the Star Kimberlite (Table 10.2). Fourteen core holes were completed, with the dual aim of gathering detailed information on the country rock lithologies and detailing the hydrogeology associated with those units. There was a total of 2,477.3 m drilled with 12 of the holes being shorter vertical holes (drilling depths ranging from 79 to 261 m). Two inclined holes were drilled to depths of 267 and 287 m.
The purpose of the program was to install piezometer wells at different depths in order to provide a site for short- and long-term monitoring of the groundwater in the area. It is anticipated that the piezometer wells will be monitored in the long term to provide baseline information of the project and provide information about any changes that occur in the elevation and quality of the groundwater. In addition, while drilling the holes, packer testing was performed at regular intervals to provide additional information of the hydraulic properties of the clayey till, mudstone and sandstone materials at depths ranging from 41.2 m to 250.5 m. The core was logged geotechnically with sampling for in-situ and laboratory test work. This work included moisture, soil classification, grain size analysis, clay content, shear strength, pore pressure and carbonate testing.
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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