News ReleaseDunnedin recovers 278 diamonds from Notch to date 2016-03-21 09:48 ET - News Release Mr. Chris Taylor reports NOTCH KIMBERLITE PROCESSING IS FORTY PERCENT COMPLETE - FAVOURABLE COMMERCIAL-SIZED DIAMONDS RECOVERED Dunnedin Ventures Inc. has processed approximately 40 per cent of the 2.4-tonne Notch kimberlite sample collected during the 2015 field program. To date, 278 diamonds (+0.425 mm) including 36 commercial-sized stones (+0.85 mm) have been recovered. Preliminary results are provided in the table below. DIAMONDS RECOVERED TO DATE FROM THE NOTCH SAMPLE Weight Total Total in Dry number carat Tonnes of weight Endecott sieve size (mm) Largest diamonds (+0.85 mm) diamonds recovered 0.425 0.6 0.85 1.18 1.7 2.36 3.35 4.75 (carats) (+0.425 mm) 1.02 278 0.66 175 67 26 8 2 0 0 0 0.10, 0.08, 0.05 "Early results from Notch confirm an attractive diamond population with most stones being clear and colourless variants of octahedra," said Chris Taylor, Dunnedin's CEO, "While we look forward to finishing this sample, we have requested that the lab immediately process till samples collected in 2015. We will then compare indicator mineral chemistry from tills with both PST and Notch to guide our upcoming work. The remaining 1.4 tonnes of Notch kimberlite, plus additional kimberlite from PST and other targets will be processed after completion of the till samples." Over 22 tonnes of kimberlite from Notch were historically processed for diamond recovery. Commercial-sized diamond counts (+0.85 mm) are higher in the current sample than expected from historical reports, however the current sample size is insufficient to characterize the body as a whole, and preliminary results from Notch do not constitute either a deposit grade or a completed sample grade. The Notch sample was treated through an autogenous mill-fusion circuit located at CF Mineral Research Ltd. of Kelowna, British Columbia, using a lower size cut-off of 0.425 mm. Unlike standard DMS recovery methods, the circuit can recover nearly all diamonds present in a kimberlite to the predetermined cut-off size, along with associated indicator minerals. About the Notch Kimberlite -Vertical diamondiferous kimberlite dike that is exposed at surface; historical and current samples were taken within metres of each other -Defines the southern portion of an approximately 25 km long kimberlite-intruded structure, as supported by drilling and interpreted from geophysical extensions from drilled areas; the structure also hosts the Kahuna dike and is visible on satellite images as a recessive erosional feature -The Notch/Kahuna structure contains kimberlite at all locations where drilled, however only 7 km of this feature have sufficient drill density to define Inferred Mineral Resources at Notch and Kahuna, and diamond content of kimberlite can vary along strike -Dunnedin published a NI 43-101 compliant Inferred Resource for Notch of approximately 829,000 carats of diamonds at a grade of 0.90 carats per tonne (+0.85 mm), from 921,000 tonnes of rock. The resource was based on shallow drilling of typically less than 80 m depth across 2.6 km of strike (see Dunnedin news release of January 26, 2015), and remains open along strike and at depth -Target for Future Exploration ("TFFE") completed by APEX of an additional approximately one to four million carats of diamonds at Notch based on a range of potential grades and depths (see Dunnedin news release of March 31, 2015) -Width is about 1.5 metres where exposed; generally varies from approximately 1 - 2 metres in true thickness where drilled -One of several diamondiferous kimberlites discovered thus far within 2 km of Notch, including Killiq, 07-KD-24, and PST. 07-KD-24 is notable for having historically recovered 305 diamonds including 7 macrodiamonds (+0.85 mm) from a 2.2 kg (0.0022 tonne) drill core sample