Ms. Marla Gale reports
PROCESSING OF DALRADIAN'S CURRAGHINALT MINERALIZED MATERIAL ACHIEVES HIGHER THAN EXPECTED GOLD GRADES AND RECOVERIES
Dalradian Resources Inc. has received positive results from the processing of nearly 14,500 tonnes of mineralized material from its Curraghinalt gold project in Northern Ireland, including 3,211 tonnes from three test stopes. Milling resulted in a positive reconciliation for the test stopes yielding 42 per cent more ounces and a 40-per-cent-higher grade compared with the block model of the 2016 National Instrument 43-101 mineral resource estimate. The overall recovery for all of the milled material was 95.9 per cent compared with the expected average recovery of 94.3 per cent in the feasibility study (see an image of a dore bar from the milling at the company's website).
Approximately 78 per cent of the mineralized material was from development along five different veins during underground exploration in 2015 and 2016. The remainder of the material came from three test stopes on the V75 vein completed during the last half of 2016. The milling of the mineralized material was split into three lots and batch processed with lot 1 and lot 2 from development and lot 3 from test stoping (see tables for more details).
Eric Tremblay, Dalradian's chief operating officer, commented: "Ultimately, the true test of any deposit is at the mill. These positive results build on the success of our test stoping, which demonstrated our ability to mine using mechanized methods while minimizing dilution. We have proven that these portions of the deposit contain more gold and a higher grade than estimated in our resource model. We have also shown that Curraghinalt mineralization mills well and that higher recoveries than previously estimated in the FS are achievable."
TEST STOPING RECONCILIATION
2016 resource model with dilution* Milled results
Tonnage (tonnes) 3,153 3,211
Gold grade (g/t) 11.24 15.71
Contained gold (oz) 1,139 1,621
* Dilution was estimated using the same percentage as was achieved in the test
stoping and a grade of zero gram per tonne for the wall rock (same dilution grade
as the resource model).The average recovery for the test stope material was 95.8 per cent, which is 1.5 percentage points higher than the expected average recovery in the feasibility study of 94.3 per cent.
DEVELOPMENT RESULTS
Lot 1 Lot 2 Total
Tonnage (tonnes) 2,385 8,777 11,162
Milled grade (g/t Au) 7.37 7.03 7.10
Recovery 94.0% 96.6% 96.0% Results from the development material returned grades that were 6.6 per cent higher than predicted by the resource model in the development area. The resource model predicted approximately 6.66 grams per tonne gold for a development width of 3.0 metres on average compared with the actual recovered grade of 7.10 g/t Au. The average recovery was also 1.7 percentage points higher than predicted in the FS.
Qualified person
Eric Tremblay, PEng, chief operating officer, is the qualified person who supervised the preparation of the technical data in this news release.
Sampling and assaying were performed on the mineralized material entering the process plant, both by the operator and independently. Dalradian personnel supervised all aspects of the milling test, including transport, sampling and processing.
Samples were submitted to Base Metallurgical Laboratories Ltd. and assayed by Activation Laboratories Ltd., both located in Kamloops, B.C., Canada. Quality assurance and quality control procedures identified no material issues and pulp samples were analyzed by fire assay with a gravimetric finish.
About Dalradian Resources Inc.
Dalradian Resources is a gold exploration and development company that is focused on advancing its high-grade Curraghinalt gold project located in Northern Ireland, United Kingdom.
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