Diamond Geology and Exploration

2018 Kimberlite Discoveries at the Loki (Lac de Gras, NT) and Mel (Melville Peninsula, NU) Diamond Projects

Tuesday, November 20, 2018 - 10:00 to 10:19 Theatre 1


M. MacMorran (Presenting)
North Arrow Minerals Inc.

Details will be provided on the recent kimberlite discoveries at North Arrow’s Loki (NT) and Mel (NU) diamond projects.

In April of this year, North Arrow announced the discovery of a new kimberlite at its Loki Diamond Project in the Northwest Territories. The Project is located in the Lac de Gras region, approximately 30 km southwest, and 24 km west of the Ekati and Diavik diamond mines, respectively. The Loki claims are contiguous to the south and east of the diamondiferous Monument kimberlite cluster. The project hosts several prospective exploration targets, as well as five known kimberlites: EG-01, EG-02, EG-05 and EG-130.

At the beginning of March 2018, North Arrow commenced drilling to test the EG-05 kimberlite, as well as other priority targets. On April 5th, intersections of the first new kimberlite (465) discovered at Lac de Gras in over five years were announced, along with new drilling of kimberlite EG-05.

The Mel Diamond Project is located on the Melville Peninsula (NU), approximately 140 km south of the community of Hall Beach, and 210 km northeast of the community of Naujaat (formerly Repulse Bay).

A prospecting program conducted in late 2017 focused on discovery of potential kimberlite bedrock sources to a well-defined kimberlite indicator mineral train in the north part of the project area. Kimberlite float and subcrop was found in two areas, including a surface exposure of the ML8 kimberlite. A 62.1 kg sample of ML8 yielded 23 diamonds larger than the 0.106 mm sieve size, including a single, colourless diamond larger than the 0.85 mm sieve size.

The 2018 exploration program included 778m of exploration drilling leading to the discovery of a new kimberlite (ML345) and defining the ML8 kimberlite over a 170m strike length. In addition, 447 till samples were collected to better define existing and new targets within the project area, 14 magnetic ground survey grids were completed, and over 200 kg of kimberlite was collected from surface at ML8 for further microdiamond analysis.