Copperstone Resources AB
Pressmeddelande
Copperstone Exploration: Good assay results from drilling at Svartliden
strengthens the hypothesis of a potential Cu-Au porphyry-style system
Copperstone Resources (Copperstone or the Company) has received and evaluated
the assay results from the Svartliden (SV) drill campaign (4 drill holes) from
the summer of 2016. Together with historic data from earlier drilling campaigns
this supports the hypothesis presented in the press release of October 24,
2016, that mineralization in the Svartliden and adjacent concessions may be
part of a large scale Au-Cu porphyry-style system and that Svartliden-Eva may
be part of a single underlying system.
In total there is approximately 8,675m of core drilling at Svartliden,
including 1137m (6 drill holes) drilled by Copperstone in 2015-2016. This
dataset is currently under review by the team based in Malå to map out
phreatomagmatic breccia bodies, define various alteration zones and also
interpret the nature of sulphide development. Weighted average laboratory data
presented at the Copperstone website (www.copperstone.se) forms part of a
larger 56 drill hole dataset around the Svartliden property.
At this stage, results show significant grades of Au-Ag-Cu-Zn mineralization
in a number of intercepts ranging from subsurface to approximately 200m depth;
above 2,7 % Cueq at the best intercept 1,7 m (older results close by show over
3 % Cueq over 2,5 m, results are summarised in table 1). At present there is no
indication of true width of the mineralization and the system remains open with
depth. Preliminary results from alteration mapping have identified both
advanced argillic and propyllitic styles, suggesting that there is potentially
a single larger system below the Svartliden-Eva area (approx. 1.5 km2).
Silicified and partly mineralized breccia appears to form the eroded roots of a
larger phreatomagmatic system that is necking down towards the inferred stock
at depth.
In particular COS16352 has drilled through a root zone of the diatreme system
containing a large xenolithic block of altered sidewall geology that is
significantly mineralized from 239,6-241,3m (see appendix). Depth to predicted
mineralization within the perceived porphyry system remains unknown but an
encouraging increase in gold grades suggests better mineralization will be
located with the deeper drill holes planned for the winter of 2017.
The alteration mapping programme being carried out in Malå is being supported
by a ground magnetic survey to verify the various historic airborne and ground
anomalies. In addition new mineralogical work is under way to assist with full
identification of alteration minerals, and thus classify the various alteration
styles around the system.
The assay has been carried out by the accredited laboratory ALS Global using
ME-MS61 complemented by CU-OG62 and Zn_OG62 for grades over 1% Cu and Zn
respectively, gold has been analysed using Fire Assay method Au-AA23. Certified
standards has been inserted among the samples to ensure quality of assay.
“We are very excited over what we are seeing at this point. It could
potentially result in a world class asset that would change the outlook for
Copperstone and for Sweden as a mining nation. We look forward result of the
international team and to the final 3D-model and the plan for further core
drilling” says Copperstone CEO Per Storm in a comment
Table Summary of intercepts from drill holes of the SV area, 2015-2016 drill
holes are highlighted.
Drillhole From To Intercept Au Ag Cu (%) Zn (%) Cueq
Name (m) (m) (m) (g/t) (g/t) (%)*
--------------------------------------------------------------------------------
COS05282 186,15 188,68 2,53 0,50 46,87 2,19 0,24 3,02
--------------------------------------------------------------------------------
COS16352 239,60 241,30 1,70 0,47 44,12 1,86 0,50 2,74
--------------------------------------------------------------------------------
COS05283 207,90 213,80 5,90 0,51 39,42 1,28 0,44 2,12
--------------------------------------------------------------------------------
COS05283 99,30 116,33 17,03 0,39 23,80 0,24 2,85 1,69
--------------------------------------------------------------------------------
BH11 13,57 29,60 16,03 0,04 24,00 1,11 1,26 1,81
--------------------------------------------------------------------------------
COS05278 194,27 208,50 14,23 0,12 24,10 1,33 0,28 1,73
--------------------------------------------------------------------------------
COS05289 191,30 222,70 31,40 0,09 11,25 0,74 0,11 0,94
--------------------------------------------------------------------------------
COS16351 77,95 82,00 4,05 0,33 12,90 0,42 0,53 0,92
--------------------------------------------------------------------------------
COS04208 27,05 66,55 39,50 0,11 13,00 0,44 0,65 0,86
--------------------------------------------------------------------------------
COS16349 27,20 87,00 59,80 0,11 6,53 0,50 0,40 0,77
--------------------------------------------------------------------------------
COS04209 42,10 79,25 37,15 0,08 8,00 0,58 0,15 0,76
--------------------------------------------------------------------------------
COS06316 110,60 151,90 41,30 0,05 9,82 0,50 0,37 0,75
--------------------------------------------------------------------------------
COS05212 9,10 39,85 30,75 0,09 7,07 0,58 0,11 0,74
--------------------------------------------------------------------------------
COS16352 168,00 213,00 45,00 0,15 11,23 0,15 0,67 0,58
--------------------------------------------------------------------------------
* Copper equivalents has been calculated using prices first published in the
press release 2016-04-18
For further information, please refer to Copperstone Resources webpage :
www.copperstone.se, or contact Per Storm, CEO Copperstone Resources AB, 0705–94
90 24, e-mail: per.storm@copperstone.se.
Copperstone Resources AB (publ) is an exploration company focusing on the
Copperstone project in the vicinity of the Skellefte field. This project has
the potential to become one of the biggest base- and precious metal deposits in
the Nordic Region.
Copperstone Resources has thirteen exploration tenements covering c:a 11 360
hectare and two mining concession and one applied concession covering a total
of 82 hectare.
G&W Fondkommission is the Certified Adviser for Copperstone Resources AB.
Appendix best section from COS 16352
Drill SAMPLE From To Length Au Ag Cu Zn S As
Sb Bi Cd Pb
Hole
--------------------------------------------------------------------------------
---------------------
m m m ppm ppm ppm ppm % ppm
ppm ppm ppm ppm
--------------------------------------------------------------------------------
---------------------
COS163 N24946 239,6 240,5 0,9 0,52 33,3 11950 5020 >10.0 >10000
97 2,94 24,2 125,5
52 9
--------------------------------------------------------------------------------
---------------------
COS163 N24947 240,5 241,3 0,8 0,41 56,3 26100 4940 >10.0 7370
54,4 2,55 25,2 137,5
52 3
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