HIGHLIGHTS:
Exceptional intersection demonstrates the scale and strong grade of the Brama-Alba porphyry discovery; Assays from hole BMDD034 include: 202m at 0.88g/t AuEq* (0.65g/t gold and 0.13% copper), from 148m in BMDD034, including 42.0m at 1.00g/t AuEq1 (0.74g/t gold, 0.14% copper), from 252m
These assays sit within a broader interval of 363m at 0.71g/t AuEq* from 124m in BMDD034
The area of mineralization near BMDD034 remains open
These results provide further evidence that the Brama-Alba discovery is large by global standards and contains grades in line with many well-known porphyry projects
Exploration continues at nearby porphyry targets Playas, Sandia, Melonal, and Limon in preparation for drilling in 2022
Sunstone Managing Director,
'This is a very good intersection in BMDD034 with width and strong grade and will be included in our upcoming initial Mineral Resource Estimate (MRE).
'It is clear we have a large gold-copper porphyry system at the Alba end of the 1.2km long Brama-Alba porphyry deposit, which remains open in several directions.
'It is also worthy to note that the gold equivalent calculation is based on gold and copper only, and yet we are seeing very consistent silver values through all mineralized drill holes, as well as domains of elevated molybdenum.
'We have four drilling rigs working 24/7 at Brama-Alba so that we have adequate drill coverage to deliver the initial MRE in the 4th quarter. The initial MRE for Brama-Alba will be a starting point that we can then build on.
'We are working up multiple adjacent targets for drilling so that we can also deliver an Exploration Target, and position Sunstone and Cornerstone to deliver additional discoveries at Bramaderos during 2022. These will be high value discoveries because they will enable expansion of whatever initial MRE is delivered.'
The reader is cautioned that there has been insufficient exploration to define a mineral resource at Bramaderos and it is uncertain if further exploration will result in the target being delineated as a mineral resource.
FURTHER INFORMATION:
The results from hole BMDD034 expand the size of the Alba discovery with a wide higher-grade intersection of 202m at 0.88g/t gold equivalent with sub-domains that exceed 1.0g/t gold equivalent (see Table 1 below). The wide interval of 202m at 0.88g/t gold equivalent is within a broader interval of 363m at 0.71g/t gold equivalent.
All holes reported in this release intersected significant wide zones of gold-copper mineralization (Table 1). Results from holes BMDD017, 020, and 021 were previously reported (see news releases dated
Drill hole BMDD034 had a shallow dip of -30 degrees and therefore this strong intersection is within 150m of surface (Figure 4). The intersection in BMDD034 is orthogonal to well mineralized previously reported holes BMDD020 and 021 (Table 1, Figure 4) and therefore helps define a higher grade, wider zone of mineralization at Alba.
The results provide further evidence that the Brama-Alba porphyry system hosts a substantial gold-copper porphyry deposit (Figures 3, 4, 5).
The Brama-Alba system remains open in several directions, and these areas are being tested as part of the current drilling program (Figures 3 and 4). Adjacent targets with the potential for new discoveries include Playas to the east, Sandia to the south, Limon to the north, and Melonal to the west (Figure 5) and are expected to be drill tested in 2022, once the resource drilling at Brama-Alba is complete in late September.
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