Limon emerging as major discovery with visible gold in follow-up...

Limon emerging as major discovery with visible gold in follow-up hole

The latest interval is ~700m away and geologically similar to hole LMDD017, which returned 177m at 1.1g/t AuEq from surface; Second rig now on site to accelerate growth of this discovery

Key Points

• Drilling at the Limon target, within the Bramaderos Project, has intersected further visible gold in an epithermal vein system at 600m below surface in hole LMDD020

• The interval shows geological similarities to that from hole LMDD017 which intersected 177m at 1.1g/t AuEq from surface

• The Limon target area is 2.7km from the Brama-Alba gold-copper deposit, which hosts a
porphyry gold-copper-silver Mineral Resource of 2.7Moz AuEq; In addition, the
Bramaderos project Exploration Target is between 3.3Moz and 8.6Moz AuEq within 255
to 360Mt at a grade between 0.40 and 0.74g/t AuEq (see ASX release dated December
13, 2022)

• In light of the results from LMDD017 and 020, Sunstone expects to increase both the
tonnes and grade of the Exploration Target

• This latest result at Limon significantly expands the search space for the epithermal
system with two drilling rigs now focussed on defining the scale of what appears to be a
large epithermal system, overlying or adjacent to a porphyry gold-copper system

• Assays from hole LMDD020 are expected in early-mid May

• Malcolm Norris, Sunstone Metals MD said “This could have very significant ramifications
for the total resource, the overall grade and the upfront development options at
Bramaderos. We stand by our objective of discovering a 10Moz gold district with
multiple deposits within 4km of one another”