Vancouver-based Peregrine Diamonds has discovered a new kimberlite at its Chidliak project on Baffin Island. CH-51 (so named because it is the 51st kimberlite discovered) was the first target drilled in 2011.
CH-51 was discovered by drilling one vertical core hole from lake ice into a high priority magnetic high anomaly. Kimberlite was intersected over an interval of 101 metres from a depth of 33 to 134 metres underneath 25 metres of water and 8 metres of overburden.
Mantle xenoliths, abundant kimberlite indicator minerals and Palaeozoic carbonate rock fragments were observed in the drill core. From 134 to 171 metres, gneiss with minor kimberlite stringers was intersected and from 171 to 175 metres a macrocrystic kimberlite dyke was encountered. The hole was terminated in gneiss at a depth of 188 metres. Based on interpretation of the ground geophysical data, CH-51 has an estimated surface expression of one hectare.
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