Dunnedin Ventures Announce Second Notch Sample Returns 1.29 Carats of Commercial Sized Diamonds

September 6, 2016

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Dunnedin Ventures Inc. (TSX.V:DVISeptember 6, 2016 – Vancouver, BC, Canada. – Dunnedin Ventures Inc. (TSXV:DVI) is pleased to report final diamond recovery results from the Notch kimberlite.  The second, 1.30 tonne sample of Notch returned 49 commercial-sized stones (+0.85 mm) totalling 1.29 carats, for a sample grade of 0.99 carats per tonne. The largest recovered diamond was a 0.23 carat clear and colourless octahedral stone.  Results are provided in the table below along with an image of the two largest stones.

Table 1: Diamonds recovered from the Notch kimberlite

Sample Weight in Dry Tonnes Total
Number of Diamonds Recovered (+0.425 mm)
Total Carat
Weight (+0.85 mm)
Endecott Sieve Size (mm)
0.425 0.60 0.85 1.18 1.70 2.36 Sample Grade
Largest Diamonds
Notch 1 1.02 278 0.66 175 67 26 8 2 0 0.65 0.10, 0.08, 0.05
Notch 2 1.30 318 1.29 179 90 33 11 3 2 0.99 0.23, 0.17, 0.09

We continue to be impressed with the quality of diamonds recovered from our kimberlites,” said Chris Taylor, CEO of Dunnedin, “Till samples, drilling and geophysics all suggest Notch may have up to double the 2.6 kilometre strike length that was used to calculate its published potential for 2 – 5 million carats of commercial sized diamonds as reported in our NI 43-101 compliant Inferred Resource and Target for Further Exploration.  Notch therefore presents an attractive target with significant potential for further resource expansion and bulk sampling.”

Most of the Notch diamonds recovered by Dunnedin are clear and colourless variants of octahedra. On January 26, 2015, Dunnedin published a NI 43-101 compliant Inferred Resource for Notch prepared by APEX Geoscience Ltd. (“APEX”) with the following highlights:

  • 829,000 carats of diamonds;
  • at a grade of 0.90 carats per tonne (+0.85 mm);
  • from 921,000 tonnes of rock;
  • based on very shallow test drilling of typically less than 80 metres depth;
  • across 2.6 kilometres of strike;
  • remains open to extension along strike and at depth

Dunnedin followed with publication of a Target for Further Exploration (“TFFE”) that provides additional potential tonnages and contained carats that are not yet included in the Notch Resource, also prepared by APEX (see Dunnedin news release of March 31, 2015) of an additional 1.10 to 4.05 million carats based on a range of possible grades and depth extents.  Note that the TFFE conservatively does not include any consideration of potential additional strike extent.

Table 2: TFFE for Notch as prepared by APEX Geoscience Ltd.

Low Range High Range
Range (m)
Tonnage Grade (cts/t) Total Carats Depth Range (m) Tonnage Grade (cts/t) Total Carats
110‐300 1,570,000 0.70 1,100,000 110‐600 4,050,000 1.00 4,050,000
The Notch and the Kahuna kimberlites occupy a 25+ kilometre long kimberlite-intruded structure as established by drilling, geophysics and till sampling.  While the total volume of diamond-bearing kimberlite has not yet been defined, the seven kilometres drilled to date have a published capacity for 10 – 20 million carats of commercial-sized diamonds as stated by the Inferred Resource and TFFE.  The potential quantity and grade of any TFFE is conceptual in nature, as there is insufficient exploration to define a Mineral Resource and it is uncertain if further exploration will result in the target being delineated as a Mineral Resource.
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Category: Gem