Garsay Property History
No documentation exists that indicate that any exploration work was conducted on the property prior to 2010. In March of 2010 the property was optioned by Newmont Ventures Limited a subsidiary of Newmont Mining Corporation (“Newmont”) which undertook a systematic exploration program. The program was comprised of initial stream sediment sampling followed by a soil sampling program. This exploration was then supplemented with a program of trenching and pits used to investigate the bedrock continuity of the soil geochemical anomalies. Newmont subsequently conducted a regional Airborne Magnetics and Radiometric Survey as well as local ground gravity and induced polarization surveys. These programs were followed up by Air Core, Reverse Circulation and Diamond drilling.
The stream sediment sampling program was conducted between March and November 2010. The program was conducted on a regional scale in combination with Landsat satellite images and hydrographic maps outlining the various branches of the river systems and watersheds. The samples were analyzed using a bulk leach extractable gold (BLEG) method. A total of 34 samples were collected and sent for analysis. The statistical results from the stream sampling program were: a mean value of 4.47 ppb gold, a median of 3.86 ppb gold, minimum value of 1.64 ppb gold and a maximum value of 9.98 ppb gold. The data is displayed in figure 3.
Figure 3: Stream Sediment Sampling Map (after Curien, H. 2012)
The soil sampling program conducted by Newmont was focused on target areas identified by the stream sediment BLEG program. The survey was initially designed at line spacing of 800 meters with samples collected at 100 meter stations, but was then infilled at lines spaced at 400 meters with samples collected at 50 meter stations. A total of 1168 soil samples were sent for analysis, the gold data is displayed in figure 4.
Figure 4: Soil Sampling Map (after Curien, H. 2012)
The data returned from the 1168 soils gave an average of 9.29 ppb gold with minimum values of 2 ppb or less and maximum values of greater than 1000 ppb gold. From this data Newmont identified three zones for further exploration, namely the G1 (consists of the G1N and the G1S) G2 and G3.
During the same period Newmont initiated a program of pitting and trenching to further investigate to reasonable depths anomalies identified by the geochemical survey. Generally excavations were done by hand with pits measuring approximately 1×1 meter and maximum depth of 3 meters; trenches were 1 meter wide with a maximum length of 7 meters to a maximum depth of 3 meters. Samples were collected from the bottom of the pit or trench respectively. A total of 181 pits and 7 trenches were completed.
In May of 2011 Newmont began a drill campaign to test anomalous areas identified by the pitting and trenching. A total of 2370 meters of drilling was conducted on the G1 consisting of 31 Reverse circulation holes drilled to test G1N and 27 Air core holes testing G1S. The results of the drilling campaign were very encouraging especially for the RC program in the G 1 North. The best intersections from this round of drilling were : GRC012 Hole: 21 m @ 1.67 g/t Au, GRC015 Hole: 17m @ 0.56g/t Au , GRC030: 4 m @ 13.7 g/t Au (including 1m @ 53.1 g /t Au) and 6 m @ 13.97g / t Au (including 1m @ 78.3 g/t Au)
Between October and December 2011 Newmont undertook a program of geophysical surveys consisting of a regional airborne magnetic radiometric survey, and detailed ground gravity survey and a ground Induced Polarization survey over the G1 area. Results from these surveys are shown on figures 5, 6 and 7.
Figure 5: Airborne Magnetics Map (after Curien, H. 2012)
Figure 6: Ground Gravity Map (after Curien, H. 2012)
Figure 7: Ground Induced Polarization Map (after Curien, H. 2012)
Newmont resumed its reverse circulation drilling in April 2012. A total of 101 RC holes totaling 8499 m were completed during this time. The holes ranged in length from 60 to 150 meters. Again the holes were drilled at 50 degree dips at azimuths of 270º, infilling original drill fences and along profiles between them in an attempt to project mineralized zones along strike.
Finally in May 2012 Newmont under took a diamond drill program to aid in the understanding of the geology and mineralogy of the mineralized zones encountered from the Reverse circulation drilling. A total of eight holes, one which was abandoned before reaching bedrock, were drilled totaling 1,508 meters. Despite significant gold intercepts in most of these holes Newmont dropped its option on the Garsay Permit as part of its withdrawal from Burkina Faso.