- 900 ha property under option by Forte Minerals from Candente Copper Corp.
- Total of 12 historic, relatively shallow diamond drill holes completed on the project since 1977
- Enrichment grades up to 0.79% Cu
- Primary grades up to 0.321% Cu and 0.15 g/t Au
- Miocene Porphyry Cu-Au with enriched and primary mineralization potential beneath a 1.3 x 0.5 km leached cap
Don Gregorio (Porphyry Cu-Au)
Summary
Forte Minerals can acquire a 60% interest in Don Gregorio by:
- Cash payments of US$500,000 over 3 years.
- Total of 10,000 m diamond drilling over 3 years upon receipt of drill permits.
Exploration Target
- 2.6 x 1.7 km porphyry Cu-Au exploration target outlined from geochemistry, geophysics, and drilling.
- Hole S9 (eastern-most drill hole):
- 45m of 0.56%Cu (Secondary)
- 55m of 0.39%Cu (Primary)
- EOH 100m - Open to the east and depth.
- Historical drilling focussed on one section corridor.
- Limit of phyllic alteration is interpreted to coincide with strong chargeability (>20 mV/V).
- Enrichment and leach cap are partially removed by erosion.
- Geochemical response controlled by erosion and post-mineral cover characteristics.
- Strong geochemistry not necessarily above porphyry centre.
- Potential for stronger enrichment zones exists on the northern side of the target.
Historical Drilling
- Drilling was focussed on one section corridor.
- Exploration potential is open to the north and south on the section.
- Portions of the leached and enrichment profile removed by erosion.
Hole |
From |
To |
Cu % |
Au g/t |
Zone |
---|---|---|---|---|---|
LH-01 |
0 |
14 |
|
|
Leached |
|
14 |
54 |
0.564 |
0.211 |
Secondary |
|
54 |
300.2 |
0.142 |
0.145 |
Primary |
LH-02 |
0 |
44 |
0.303 |
0.146 |
Secondary |
|
44 |
237.5 |
0.154 |
0.065 |
Primary |
LH-03 |
0 |
42 |
0.412 |
0.133 |
Secondary |
|
42 |
300.1 |
0.265 |
0.07 |
Primary |
LH-04 |
0 |
36 |
0.438 |
0.25 |
Secondary |
|
36 |
153.3 |
0.321 |
0.153 |
Primary |
S1 |
0 |
25 |
0.466 |
|
Secondary |
|
25 |
75 |
0.291 |
|
Primary |
S4 |
0 |
25 |
0.794 |
|
Secondary |
|
25 |
80 |
0.371 |
|
Primary |
S6 |
0 |
45 |
0.052 |
|
Leached |
|
45 |
80 |
0.433 |
|
Secondary |
S7 |
0 |
15 |
0.001 |
|
Leached |
|
15 |
107.5 |
0.281 |
|
Secondary |
- Exploration potential remains open at depth and in all directions
- All holes encountered Copper and Gold mineralization (when analysed)
- S8 & S9 encountered significantly high grades of secondary and primary copper mineralization.
- The region to the east and north remains highly prospective and be a focus of the upcoming drilling campaign.
- Drilling target area delineated with - - - -
Analysis and Recommendations
Future drilling needs to be upslope and above the blanket in order to determine the full thickness and size of the blanket, which currently grades 0.4-0.6% Copper and 0.15g/t Gold; Primary copper grades are in the 0.3-0.35%+ Cu.
The better grade, potassically altered rocks have not been penetrated by historical drilling. Total tonnage target ranges from 250-500 million tonnes of 0.3-0.5% Cu.
Forte ranks this investment in the same class as Constancia and Zafranal except Don Gregorio contains significant gold mineralization ~ 0.15 g/t Au. Shallow historical drilling <100m ended in copper mineralization and suggest potential for a larger hypogene mineralization at depth.