new kimberlites
CH-4 kimberlite
The CH-4 kimberlite is situated 1.5 kilometres west of the CH-1 kimberlite. Two holes, drilled across a geophysical anomaly with an estimated surface expression of two hectares as determined by ground geophysics, were drilled at an azimuth of 132 degrees from the same set-up at inclinations of 45 and 60 degrees from horizontal. Kimberlite was intersected at a depth of 11 metres in the first drill hole. The longest kimberlite intersections in each hole were 71 and 60 metres, respectively. The kimberlite material at CH-4 is more altered than that encountered at CH-1 and is described in the field as being dominantly olivine-rich magmatic material. Sufficient kimberlite core currently exists for representative microdiamond samples, though additional drill holes will be required fully to assess the geometry and geology of this kimberlite.
CH-5 kimberlite
The CH-5 kimberlite was discovered on July 10, 2009, when kimberlite cobbles and boulders were identified at surface while prospecting a priority-two geophysical anomaly situated approximately eight kilometres west of the CH-4 kimberlite. The magnetic-high anomaly has an estimated surface expression of one to two hectares as determined from airborne geophysics. Two different types of kimberlite were tentatively identified in the field. The first type is a coarse-grained altered material with limestone xenoliths and altered pyrope garnet and olivine. The second type is finer-grained with altered indicator minerals. Samples weighing approximately 200 kilograms will be collected from each of the two kimberlite phases for microdiamond analysis and results are expected next month. This discovery of kimberlite at a priority-two anomaly that was not scheduled for drilling this year is a further illustration of the exploration potential at Chidliak.
