Copperstone Resources publ : TECHNICAL INVESTIGATIONS ADDING SUBSTANTIAL VALUE

Copperstone Resources AB ('Copperstone' or 'the Company') publishes an executive summary of the technical report which is currently being finalized. The Company will return with the full report shortly.

Geochemistry results have confirmed that the host rock geology consists largely of silici-clastic sedimentary rock units intruded by a complex suite of silicic to intermediate subvolcanic bodies. Mineralogical studies have also confirmed extensive sericite, pyrite and silica alteration attributed to widespread hydrothermal systems that were active before and during mineralisation events.

The 2017 drill campaign has proved the existence of deep hydrothermal alteration patterns, the presence of high grade vein-style Cu-Zn-Au mineralization well below the historical drillhole dataset, and the persistence of structural controls. The best working model for understanding the genesis of mineralization styles on the property consists of early stage (pre-mineral) emplacement of bulbous quartz porphyry stocks at high crustal levels intruded into mature fine-grained volcano-sedimentary units. Early stage pyrite-dominated Zn-Au mineralized sulphide bodies formed as thickened veins / lodes around the periphery of these bodies (Eva-style).

Later emplacements of more dioritic composition are spatially related to hydrothermal breccia and Cu-Au vein-style mineralization. These bodies range from zoned quartz to feldspar porphyritic textured rocks to more even grained varieties, and suggest a complex stock environment associated with mineralization.

The outcome of these value-add studies thought the summer of 2017 has created a platform for recommendation of future integrated exploration work programmes to progress the exploration potential of the property. Initial geophysical work will focus on both 3D IP around the deep drillholes and simultaneous with a broader magneto-telluric study. Analysis of these will generate drill targets within the context of the working genetic model. Core drilling of ranked targets will then follow.

'The Geological expert team has had an intensive summer and the work has been fruitful. Several innovative techniques have been used and substantially increased the understanding of the geological system and more concretely that numerous older drill core get a renewed relevance which increases the value of the project. The results, which are better than expected, also gives us clear indications where we shall go next', comments Copperstone Chairman Michael Mattsson.

For further information, please contact CEO Per Storm, Copperstone, +46 705 94 90 24, e-mail: per.storm@copperstone.se or refer to Copperstone Resources webpage: www.copperstone.se.

This press release contains insider information which Copperstone Resources AB is obliged to publish according to the EU market abuse regulation (MAR). The information was delivered by the above mentioned contact for publishing August 24, 2017 at 23:50 CET.

Copperstone Resources AB (publ) is a mining exploration company focusing on the Copperstone project in the vicinity of the Skellefte field. This project has the potential to become one of the largest base- and precious metal deposits in the Nordic Region.

Copperstone Resources has five exploration tenements covering approx. 8756 acres and two mining concessions and one applied concession covering a total of 82 acres.

The share (COPP B) of the Company is traded on Nasdaq First North Stockholm with G&W Fondkommission as the Certified Adviser.

» Executive summary technical report August 2017.pdf