Vancouver, British Columbia--(Newsfile Corp. - October 1, 2015) - Discovery Harbour Resources Corp (TSXV: DHR) ("DHR" or the "Company") announces that errors were made in the calculations for drill assay results in its press release dated January 26, 2015.
That press release used weighted averages based on sample interval lengths and the sum of reported assay values for both coarse and fine sample fraction assays. This calculation process produced values higher than when assays are weighted, based on the sample fraction weights.
Results received from the lab, which assayed for total copper in the samples, have been calculated using weighted averages based on sample weights and are shown below.
Below are excerpts from that press release with the corrected values shown in bolded font.
DDH 2B14-06:
From 32.8 to 107.0ft (74.2 ft / 22.6m) averaging 1.20% Cu; (0.29% Cu - corrected)
Including:
From 82.7 to 104.6 ft (21.9 ft / 6.7m) averaging 3.73% Cu; (0.82% Cu - corrected)
With this interval including:
From 97.0 to 104.6 ft (7.6 ft / 2.3m) averaging 4.50% Cu (2.20% Cu - corrected)
With this interval including:
From 99.0 to 104.6 ft (5.6 ft / 1.7m) averaging 5.89% Cu (2.98% Cu - corrected)
DDH 2B14-07
From 7.0 to 71 ft (64.0 ft / 19.5m) averaging 0.74% Cu; (0.33% Cu - corrected)
Including:
From 26 to 40 ft (14 ft / 4.3m) averaging 1.25% Cu, and (0.50% Cu - corrected)
From 66 to 71 ft (5 ft / 1.5m) averaging 1.99% Cu (1.05% Cu - corrected)
DDH 2B14-05:
From 28.0 to 48.0 ft (20.0 ft/ 6.1m) averaging 0.14% Cu (0.075% - corrected)
DDH 2B14-03:
From 3.0 to 8.0 ft (5.0 ft/ 1.5m) averaging 0.29% Cu. (0.09% Cu - corrected)
DDH 2B14-04:
From 0.0 to 31.0 ft (31.0 ft/ 9.4m) averaging 0.48% Cu. (0.008% Cu - corrected)
Assay procedures
In addition to the above corrections the Company would also like to further report on the assay procedures used in the 2015 drill program, the results of which were reported on August 28, 2015. 123 samples from the June, 2015 drilling program, with an abundance of visible copper mineralization, were re-assayed, using the ALS Global method to recover total copper through a metallic sieve screening and a four-acid total digestion, followed by atomic absorption spectrometry analysis (AAS) (see detailed process description at end of this release for Cu-SCR21). The results of the AAS method test suggests that an abundance of copper is reporting to the oversize fractions (the +100 micron size) but the results from the fine fractions of the Cu-SCR21 process, where only 0.5 grams of material are analyzed out of an average volume of 759.9 grams (n=193 samples) may not be reporting the true copper contents of those -100 micron fractions.
The Company has subsequently employed ALS to perform subset sampling and analysis of the fine fractions from ten separate samples where copper values reported in the multiple percents within the coarse fractions but were barely detectable in the undersize, -100 micron fractions. The process designed by the Company involves the homogenizing of the fine fractions in the test samples and the collection of three, separate 50 gram subsamples from each of the 10 selected intervals. The 50 gram subsets are completely dissolved in a four acid digestion process (see below for descriptions of the acids) and analyzed using the AAS technique. This process has also been completed with all final results received on September 30. Further, as a check of the ALS results for this process, the Company has employed Accurassay Labs in Thunder Bay, Ontario to perform an identical test on four of the samples presently being processed by ALS. These results have also been received. Both labs' re-analysis of the subset samples produced results consistent with and comparable to those results reported in the Company's press release dated August 28, 2015.
Assay procedure details
The analysis of the samples was performed at ALS Global using standard preparations for rock samples for the ICP analysis. All samples were analyzed using ALS Global's aqua regia and weak acid digestion, code ME-MS41L (51 elements) and Au-AA23 (0.005 part per million detection limit). Additionally, a metallic sieve preparation process and a total copper, four-acid digestion (ALS Cu-SCR21) was performed on a total of 193 samples. Numerous samples contained visible native copper, chrysocolla, azurite, malachite, cuprite, chalcocite, and slight traces of bornite and chalcopyrite.
In the Cu-SCR21 process, the sample is dried and dry screened to 100 microns (150 mesh) saving both the plus and minus fractions for copper analysis. The fractions are weighed separately. From the minus 100 micron fraction, two 0.25 gram samples are assayed for copper content and their arithmetic average is reported as representative of the entire volume of the minus 100 micron size fraction. No acid digestion is employed to dissolve these two 0.25 gram samples. The entire plus 100 micron fraction is weighed. If the plus fraction exceeds 20 g, it is split into two or more fractions but the total weight is reported. Then, all oversize fractions are subsequently decomposed by a four-acid digestion (HNO3, HCl, HClO4 and HF) and analyzed by atomic absorption spectrometry (AAS) and reported. The total copper content, individual assays on the plus and minus fractions, and weighted fractions are calculated and reported. Given the small size of the amount analyzed from the minus size fraction and its large comparative volume (weight), the Company has analyzed larger amounts from the minus 100 micron samples, as explained above to derive a more representative presentation of the copper contents contained within the minus 100 micron fractions.
Michael J. Senn, a licensed professional geologist, is the Qualified Person for Discovery Harbour Resources as described in National Instrument 43-101 and has reviewed and approved the technical contents of this release.
For further information, contact Kieran Magee by telephone at (778) 858-0290 or by email at Kieran@discoveryharbour.com
ON BEHALF OF THE BOARD OF DISCOVERY HARBOUR RESOURCES CORP.
"Bruno Hegner"
Frank D. Hegner
President, CEO, and Director
Disclaimer for Forward-Looking Information
Certain information regarding the Company contained in this press release may constitute forward-looking statements within the meaning of applicable securities laws. Forward-looking statements may include estimates, plans, opinions, forecasts, projections or other statements that are not statements of fact. Although the Company believes that expectations reflected in such forward-looking statements are reasonable, it can give no assurance that such expectations will prove to have been correct. The Company cautions that actual performance will be affected by a number of factors, many of which are beyond the Company's control, and that future events and results may vary substantially from what the Company currently foresees.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
