Chalice Mining Ltd Extends High Grade Zones Beyond 600 Meters
“Drilling provided new high grade results, once again reinforcing the scale and significance of the Julimar discovery within weeks of our first mineral resource estimate,” said the General Manager and CEO.
The program to define the resources of (,) at the platinum group elements (PGE) -nickel-copper-cobalt-gold deposit of Gonneville has demonstrated the continuity of high-grade zones beyond a depth of 600 meters .
New solid drilling and metallurgical test results have been reported by CHN as part of ongoing exploration on its 100% owned Julimar project located 70 kilometers northeast of Perth, Western Australia.
Assay results from 132 diamond holes and 365 RC holes defined new drill targets for further exploration:
- The high-grade zones G4, G6, G7 and G11 at the eastern contact (lower wall) between the Gonneville intrusion and the surrounding meta-sediments;
- Infill and down-dip extensions to high grade G1-G9 zones; and,
- Non-magnetic pyroxenite and the leucogabbros-rich northwest part of the Gonneville Intrusion.
From 113 new drill holes, CHN found 282 intervals of mineralization greater than four meters in width and at least 0.3 g / t palladium and 216 other high grade PGE-gold-nickel-copper mineralized intervals -cobalt, 52 of which are particularly remarkable, being more than two meters wide and at least 1 g / t of palladium and 0.5% of nickel-copper.
1000 meters still to explore
“Drilling provided new high grade results, once again reinforcing the scale and significance of the Julimar discovery just weeks away from our first mineral resource estimate,” said Alex Dorsch, General Manager and Chief from the direction of Chalice.
“The exciting new results reported today show that the high grade zones have significant diving extent yet to be tested, with approximately 1,000 meters of extent between the borehole boundary and the state forest boundary.
“There is still a significant amount of exploration drilling to do before understanding the true scale of the Gonneville deposit. “
Wide intervals of high grade mineralization were intersected during drilling, extending the G12 zone along strike, the G2, G4 and G6 zones down dip and the G4 zone up dip.
With confirmed mineralization beyond 600 meters and 1,000 meters of plunge remaining to be explored, deeper extension drilling will continue beyond the First Mineral Resource Estimate (MRE) to define depth and scale. real values of the deposit.
Gonneville Intrusion 3D View – new key drill results and high grade zones.
The results support the updated geological model
New high grade extension and infill results demonstrated the validity of the updated Chalice geological model and underscored the prospective value of the deposit.
New output results:
- 26 meters at 4.8 g / t palladium, 1.0 g / t platinum, 0.5% nickel, 0.3% copper and 0.04% cobalt from 286 meters – G2;
- 32 meters at 2.4 g / t of palladium, 1.0 g / t of platinum, 0.2 g / t of gold, 0.1% of nickel, 0.1% of copper and 0.01% of cobalt from 76 meters – G4;
- 10.2 meters at 1.6 g / t of palladium, 0.4 g / t of platinum, 0.1 g / t of gold, 0.1% of nickel, 0.6% of copper and 0.01 % cobalt from 299 meters – G4;
- 18.1 meters at 1.6 g / t of palladium, 0.4 g / t of platinum, 0.2 g / t of gold, 0.3% of nickel, 0.7% of copper and 0.02 % cobalt from 600.2 meters – G4;
- 13.4 meters at 3.2 g / t of palladium, 0.9 g / t of platinum, 0.1 g / t of gold, 0.2% of nickel, 0.1% of copper and 0.02 % cobalt from 149 meters – G4;
- 8.9 meters at 2.4 g / t of palladium, 0.5 g / t of platinum, 0.1 g / t of gold, 0.9% of nickel, 0.5% of copper and 0.05 % cobalt from 246.1 meters – G2;
- 7 meters at 3.9 g / t of palladium, 0.7 g / t of platinum, 0.8% of nickel, 0.6% of copper and 0.05% of cobalt from 223 meters – G2;
- 10 meters at 3.9 g / t of palladium, 0.7 g / t of platinum, 0.1 g / t of gold, 0.3% of nickel, 0.3% of copper and 0.02% of cobalt from 225 meters – G4; and
- 10 meters at 1.2 g / t palladium, 0.2 g / t platinum, 0.5% nickel, 0.3% copper and 0.04% cobalt from 133 meters – G12.
Infill drilling spaced 40 meters apart through the deposit also gave high grade results:
- 33.2 meters at 2.2 g / t of palladium, 0.5 g / t of platinum, 0.3 g / t of gold, 0.2% of nickel, 1.2% of copper and 0.02 % cobalt from 453.8 meters – G6;
- 17.7 meters at 4.7 g / t of palladium, 1.3 g / t of platinum, 0.4% of nickel, 0.4% of copper and 0.03% of cobalt from 271 meters – G2 ;
- 9.9 meters at 5.8 g / t palladium, 1.3 g / t platinum, 0.6% nickel, 0.4% copper and 0.04% cobalt from 68.1 meters – G2;
- 20.1 meters at 1.8 g / t of palladium, 0.8 g / t of platinum, 0.4 g / t of gold, 0.2% of nickel, 0.6% of copper and 0.02 % cobalt from 51.9 meters – G6;
- 17.9 meters at 2.0 g / t of palladium, 0.5 g / t of platinum, 0.5 g / t of gold, 0.1% of nickel, 0.4% of copper and 0.01 % cobalt from 97.8 meters – G6;
- 15.8 meters at 1.8 g / t of palladium, 1.0 g / t of platinum, 0.3 g / t of gold, 0.1% of nickel, 0.5% of copper and 0.01 % cobalt from 118 meters – G6; and
- 9.8 meters at 2.5 g / t of palladium, 0.3 g / t of platinum, 0.9 g / t of gold, 0.1% of nickel, 0.7% of copper and 0.02 % cobalt at 23 meters – G6.
Wide-spaced extension drilling now targets extensions of zones G1-G6 along the interpreted dive direction to NNW.
3D view of the Gonneville intrusion (looking northwest) – new key drill results and high grade zones.
First MRE expected in Q4 2021
“We have now received all assay results that will be included in the initial estimate of the limited mineral resources in the pit and work is underway with our consultants, CSA Global, with the first resource to be released mid-fourth quarter. “said Alex Dorsch.
“Given the complexity of the geology and the range of styles of mineralization observed at Gonneville, we look forward to the results of the resource modeling process to determine where Gonneville currently stands in terms of scale and quality. “
A new style of copper-rich mineralization has also been intersected under the east contact of the lower wall, with further drilling in progress to understand its significance. Mineralization is currently widely open and undefined.
Shallow areas require simple early treatment
“Our initial metallurgical studies also continue to show promising results, with the sequential flotation process scheme for high grade sulphide zones firming up as the preferred processing route,” said Dorsch.
“The shallow nature of the high grade sulphide zones means that the early stages of development will focus on processing this material with a relatively straightforward processing scheme. The focus is now on the disseminated sulphide material, with initial tests underway to determine the optimal treatment regimen. “
Ongoing metallurgical tests continued to provide promising preliminary results:
- Excellent recoveries of palladium-copper (75-90%) and good recoveries of nickel-platinum (60-75%) in separate concentrates of copper-PGE-gold and nickel-cobalt-PGE from high sulphide composites content.
- The first locked-cycle flotation tests on disseminated sulphide composites indicate good recoveries obtained in separate concentrates of copper-PGE-gold and nickel-copper-PGE in bulk.
Drilling of the national forest
“After extensive consultations with the Washington State government, we are also pleased to see that our low impact approach to initial drilling in the state forest is now close to being approved,” said Dorsch.
“We have received positive feedback on our approach to minimize disruption and look forward to final approvals for commencing drilling on the over 6.5 kilometer Hartog target in the coming weeks. “
The final conservation management plan (CMP2) for the initial drilling at Hartog-Baudin targets in the Julimar state forest was submitted in early September after extensive consultation and approval is expected in the coming weeks.