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2017-08-25

COPPERSTONE RESOURCES AB: TECHNICAL INVESTIGATIONS ADDING SUBSTANTIAL VALUE

NVESTIGATIONS 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.

Appendix: executive summary

Författare Nasdaq Stockholm

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