Before building an open pit in such an extreme and remote area, there are many variables to consider including the amount of overburden on top of the kimberlite
, near-surface ground water and other environmental considerations such as the development's proximity to water bodies and sensitive areas, as well as the distance from a mill.
Had the Beni Bousera made it up faster, some of its layers might have been a staggering 15 percent diamond, or 10,000 times as rich as kimberlite
The area was identified on the basis of historic sampling, by the Saskatchewan Geological Survey and the Geological Survey of Canada in the early 1990's that recovered high counts of kimberlite
indicator minerals including significant concentrations of pyrope and eclogitic garnets, chrome diopside and oxides covering a large aerial extent of unglaciated terrain.
The OGS indicates a significant number of kimberlite
clusters are thought to have the potential of hosting diamonds.
Studies have concluded that this cluster of diamond-bearing kimberlite
pipes range from 3 to 250 ha in surface area and from 3 to 675 million tonnes in mass.
The job is to find more kimberlite
through critical mass to make the low-grade diamonds economical or alternatively, find something slightly better than Pipe 95-2.
Stornoway has been involved in the discovery of 61 kimberlites
since 2002, more than a third of which have proven diamondiferous.
Since the original discovery of kimberlite
95-2, Contact Diamond has discovered eight kimberlites
, (including SC-118 in Quebec) six of which are diamondiferous (contain diamonds).
The company is planning a follow-up program of prospecting and sampling to assess these new targets as well as to collect larger samples of some of the known kimberlites
in order to better evaluate their diamond potential.
The 23-hectare pipe has chemistry similar to other known diamond pipes in Ontario, such as the DeBeer's Victor kimberlite
and Contact Diamond Corporation's 95-2, according to Duffett.
Geological logging of the drill core indicates that the Brauna 3 pipe is a macrocrystic micaceous hypabyssal kimberlite
The Spider-KWG find increases the total number of announced kimberlites
in the Attawapiskat cluster to 21.