Historical Results - Drilling
Ecuanor S.A. Drilling
Ecuanor S.A. drilled 13 diamond drillholes (Curi01 to Curi13) on the Curiplaya property for a total of 3,243 metres. Most of the effort was focused on the Bramaderos prospect (Bramaderos Main) where 9 holes were drilled totalling 2,212 metres (Curi01, 02, 03, 07, 08, 09, 10, 11, 13). Two holes were drilled at Melonal totalling 300m (Curi04, 06) whilst two holes were drilled at Porotillo totalling 731m (Curi05, 12).
Collars of historic drill holes Curi10 and Curi11 at Bramaderos Main.
Ecuanor S.A. targeted their drill holes on the best copper and gold soil anomalies from their soil and rockchip datasets. The most significant drill holes were Curi01, Curi03 and Curi13 from Bramaderos which intersected:
Curi01 – 193m @ 0.52 g/t Au(0.07% Cu)
Curi03 – 257m @ 0.57 g/t Au(0.14% Cu)
Curi13 – 428m @ 0.40 g/t Au(0.10% Cu)
Location of gold mineralized holes Curi01, Curi03 and Curi13 at Bramaderos Main. Yellow shaded area is the Au-in soil 0.1 g/t contour.
These three drill holes were spaced approximately 150 metres apart and intersected a volume of rock of around 400m by 200m by 220m deep. The holes intersected wide zones of gold mineralization with average grades (bulked downhole) ranging from 0.40 g/t to 0.52 g/t gold.
Curi01 and Curi03 have very consistent Au and Cu grades downhole, particularly Curi01 where no interval was over 1.0 g/t Au and yet the entire hole averaged 0.52 g/t Au.
Curi03 indicated an oxidation depth of about 34m.
The picture that may be emerging from the Ecuanor S.A. drill holes is of a very extensive Au-bearing porphyry system with significant lateral zonation in average gold grade. Given the significant lateral dimension of the intersections to date (750m horizontally from Curi03 to Curi09), the vertical extent may be equally similar, offering potential for grade to improve with depth.
Ecuador Gold S.A. Drilling
Ecuador Gold S.A. drilled 22 diamond drill holes (EGCU-01 to EGCU-22) on the Curiplaya property for a total of 7,173.71 metres. Their drilling tested a wider range of target environments than the Ecuanor S.A. drilling. The principal aim of the drilling program was to test three broad areas within the “Core Zone” (i.e. the prospects Bramaderos, Melonal and Porotillo).
The best bulked intersections from the Ecuador Gold drilling campaign are listed below:
EGCU-03 Porotillos 490.72m @ 0.25g/t Au
EGCU-03 Porotillos 181.33m @ 0.25g/t Au
EGCU-03 Melonal 393.19m @ 0.27g/t Au
EGCU-13 Bramaderos 371.85m @ 0.32g/t Au
Includes 120.40m @ 0.50g/t Au
The bulked values at the Porotillo prospect have tended to be sub-grade, however at the Bramaderos prospect Ecuador Gold S.A. drilled hole EGCU013 into the main mineralized zone previously intersected by Ecuanor with holes Curi03 and Curi13. Hole EGCU-13 yielded similar tenor gold mineralization as Ecuanor from this main zone of interest at Bramaderos.
Sunstone-Cornerstone JV Drilling
The field work programs that are presently underway on the Bramaderos property are designed to define drill targets ready for commencement of drilling in early 2018.
Cornerstone Capital Resources have prepared the paperwork (including an Environmental Impact Assessment and a Social Participation Process) for submission to the Ministry of Environment and to SENAGUA (National Water Agency - Secretaria Nacional del Agua) as a requirement to the issuance of a Permit to Drill at the Bramaderos property. Cornerstone anticipates receiving the permit to drill in early 2018.