Commodity
Gold
Target
Low Sulphidation Epithermal Gold
Location
Northern Hokkaido, Japan
Exploration Stage
Drill Testing
The Hakuryu Project is located at the southern end of the 18km long Konomai epithermal gold district. Japan's third largest past producing gold mine, the Konomai Mine produced 2.35 million ounces of gold at an average grade of 6.4 g/t, between 1915 and 1973 (Source: Garwin, S.G. et al. 2005. Tectonic setting, Geology, and gold and copper mineralization in the Cenozoic magmatic arcs of Southeast Asia and the West Pacific. Economic Geology 100th Anniversary Vol. pp 891-930).
The southern portion of the Konomai vein system lies within the northeastern part of the Hakuryu Project including the Motoyama and Fujishima veins. A total of 990,000 ounces of gold were produced from the Motoyama main vein, which produced 240,000 ounces of gold at an average grade of 14.0 g/t and from the Motoyama No. 2 vein which produced 348,000 ounces at an average grade of 8.0 g/t (Source: Gold Mines of Japan, 1989. The Mining & Materials Processing Institute of Japan).
The small Hakuryu lode, which lies in the southeastern portion of the project, produced about 8,000 tonnes of ore at 4.9 g/t Au and 43 g/t Ag.
Sekizen
- High grade rock chip values associated with a banded chalcedony outcrop – values up to 19.8g/t Au.
Fujishima Hill
- Well preserved epithermal target. Water table silica and chalcedony at surface.
- Anomalous Au at surface.
- High grade target at depth.
SW Yakiyama
- High level epithermal target – elevated Au-pathfinders, geochemical anomaly.
Hakuryu No. 3
- The Hakuryu No. 3 vein features a main zone spanning 360 meters in length with a thickness of 20 meters and plunge to the SE.
- Surface sampling has returned values up to 3g/t Au.
- Located on the northeastern edge of a 5km long anomalous gold trend.
- Interpreted to be a well-preserved epithermal vein, high level at surface, potential for higher grade mineralisation at depth.
An initial framework drill program intersected gold mineralization across narrow intervals of the Hakuryu No. 3 Vein target.
Assay highlights include:
- 16.2 g/t Au over 0.6 meters (Drill hole: DDH-HAK-001), from 103.8 meters
(a reassay of this interval yielded 24.1 g/t over 0.6 meters, from 103.8 meters) - 1.5 g/t Au over 3.3 meters (Drill hole: DDH-HAK-002), from 164.2 meters
Assay results indicate that two drillholes (DDH-HAK-001 & DDH-HAK-002) intersected anomalous gold mineralization. The mineralization is associated with a zone of hydrothermal brecciation which sits on the hanging wall side of a well-developed fault zone. The mineralization in both holes is associated with the same structural zone, indicating continuity of the mineral intersection over 145 metres of strike. Drillhole 3 (DDH-HAK-003) targeted the same structural zone but did not intersect anomalous gold, possibly due to a structural offset from faulting.
The results from the drilling are encouraging, confirming anomalous gold mineralization including the presence of high-grade mineralization within a zone of well-developed faulting and brecciation. Although no primary epithermal veins were encountered, this largely untested structural zone is part of a much more extensive corridor of alteration that extends for over 5km.
Table 1: Significant Mineralized Intercepts from DDH-HAK-001
(True thickness of mineralization is unknown at this time)
| Drill Hole ID | From (m) | To (m) | Length (m) | Au (ppm) | Ag (ppm) |
|---|---|---|---|---|---|
| DDH-HAK-001 | 101.20 | 101.80 | 0.60 | 0.35 | 4.98 |
| DDH-HAK-001 | 101.80 | 102.30 | 0.50 | 0.37 | 25.70 |
| DDH-HAK-001 | 102.30 | 102.80 | 0.50 | 0.15 | 57.20 |
| DDH-HAK-001 | 102.80 | 103.30 | 0.50 | 0.32 | 8.72 |
| DDH-HAK-001 | 103.30 | 103.80 | 0.50 | 0.23 | 9.66 |
| DDH-HAK-001 | 103.80 | 104.40 | 0.60 | 16.15 | 343 |
| Reassay | 103.80 | 104.40 | 0.60 | 24.10 | 401 |
| DDH-HAK-001 | 104.40 | 105.05 | 0.65 | 0.29 | 6.12 |
| DDH-HAK-001 | 105.05 | 106.00 | 0.95 | 0.30 | 6.22 |
| DDH-HAK-001 | 106.00 | 107.00 | 1.00 | 0.25 | 5.35 |
| DDH-HAK-001 | 107.00 | 108.00 | 1.00 | 0.12 | 6.65 |
| DDH-HAK-001 | 108.00 | 109.00 | 1.00 | 0.26 | 4.64 |
| DDH-HAK-001 | 109.00 | 110.00 | 1.00 | 0.78 | 4.32 |
Table 2: Significant Mineralized Intercepts from DDH-HAK-002
(True thickness of mineralization is unknown at this time)
| Drill Hole ID | From (m) | To (m) | Length (m) | Au (ppm) | Ag (ppm) |
|---|---|---|---|---|---|
| DDH-HAK-002 | 163.70 | 164.20 | 0.50 | 0.54 | 3.77 |
| DDH-HAK-002 | 164.20 | 164.70 | 0.50 | 1.47 | 3.05 |
| DDH-HAK-002 | 164.70 | 165.30 | 0.60 | 1.66 | 3.70 |
| DDH-HAK-002 | 165.30 | 165.90 | 0.60 | 1.44 | 2.91 |
| DDH-HAK-002 | 165.90 | 166.50 | 0.60 | 1.23 | 4.24 |
| DDH-HAK-002 | 166.50 | 167.00 | 0.50 | 1.79 | 3.98 |
| DDH-HAK-002 | 167.00 | 167.50 | 0.50 | 1.55 | 3.04 |
| DDH-HAK-002 | 167.50 | 168.00 | 0.50 | 0.60 | 5.15 |
| DDH-HAK-002 | 168.00 | 168.50 | 0.50 | 1.27 | 7.16 |
Figure 1: Hakuryu Project Simplified Geology Map with Drill Program and Local Anomalies
Figure 2: Hakuryu Drill Program Simplified Geology and Drill Hole Results (Plan View)
Figure 3: Cross sections (above) illustrating drill hole DDH-HAK-001 and DDH-HAK-002 and their gold intersections
