Gahcho Kué



Mountain Province is a Canadian company listed on the TSX and NASDAQ with C$200m market capitalization.

The Company’s primary asset is its 49% interest in the Gahcho Kué Diamond Mine, a JV with De Beers Canada (51%), who also act as the operator.

Mountain Province also holds 100% of Kennady, an advanced diamond exploration project immediately adjacent to, and surrounding.


The Gahcho Kué diamond mine is located on federal land in Canada's Northwest Territories and is held by the Gahcho Kué Joint Venture under renewable 21 year leases. The mine is on a 10,353 acre site located at Kennady Lake, approximately 300 kilometres northeast of Yellowknife and 90 kilometres east of De Beers' Snap Lake diamond mine.

GK Mine site plan and infrastructure

  1. Accommodation
  2. Processing plant
  3. Maintenance centre
  4. Fuel storage
  5. Coarse processed kimberlite pile
  6. Tuzo pipe
  7. 5034 pipe
  8. Hearne pipe

Mine Plan

Mine Plan
5034 pipe
  • Under and adjacent to Kennady Lake
  • The first kimberlite discovered at Kennady Lake
  • Abundant with Hypabyssal Kimberlite
  • Subdivided on the basis of internal geology into four lobes
  • Initial pipe to be mined
NI 43-101(1)

Grade (cpt) - 1.91
Production (Mct) - 18.4
Life of mine - Current life of mine extends to 2028

Hearne pipe
  • Consists of a northern and southern lobe
  • Hearne South is a roughly circular pipe abundant with Tuffisitic Kimberlite Breccia
  • Hearne North is a narrow elongate pipe abundant with Hypabyssal Kimberlite and Tuffisitic Kimberlite Breccia
  • Mining commenced in Q2 2018
NI 43-101(1)

Grade (cpt) - 1.99
Production (Mct) - 10.9
Life of mine - Current life of mine extends to 2028

Tuzo pipe
  • Abundant with Tuffisitic Kimberlite Breccia
  • Three zones heading to a depth of 300m
  • Potential to further develop Tuzo Deep to extend the mine life
NI 43-101(1)

Grade (cpt) - 1.22
Production (Mct) - 19.1
Life of mine - Current life of mine extends to 2028

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5034 pipe   5034 pipe   5034 pipe


The Kennady Lake kimberlite cluster is in the southeast Slave Craton. The area was glaciated repeatedly during the Pleistocene, most recently by the Laurentide ice sheet. The Laurentide ice sheet began to recede about 18,000 years ago and the ice retreated past the Kennady Lake project area between 9,000 and 9,500 years ago. Four main pipes comprise the Kennady Lake kimberlite cluster - 5034, Hearne, Tuzo and Telsa. The 5034 kimberlite is an irregular hypabyssal root zone. Hearne and Tesla are transitional diatremes and root zones. Tuzo is the deeper part of a diatremes zone.

At present, Telsa is not included in the Gahcho Kué mineable resource because of its smaller size (0.4 ha). However, it may be exploited towards the end of the project life. The shapes and internal geology of each of the kimberlite pipes has been based on the logging of the available drill core. The external shapes and internal geology of each body was modeled in three dimensions using GEMCOM. Both internal and external models were updated after drilling programs conducted between 2001 and 2011. All the pipes remain open to depth.

Technical reports