|Location||Avon Region, Western Australia|
|Development Stage||Advanced Exploration - new discovery in March 2020|
|Acquired||Staked in 2018 and subsequently expanded|
The 100%-owned Julimar Nickel-Copper-PGE Project was staked in early 2018 and is located ~70km north-east of Perth on private farmland and State Forest.
The Project has direct access to major highway, rail, power and port infrastructure in one of the world’s most attractive mining jurisdictions – Western Australia.
The Project was staked as part of Chalice's global search for high-potential nickel sulphide exploration opportunities. Chalice interpreted the possible presence of an unrecognised layered mafic-ultramafic intrusive complex at Julimar based on high resolution regional magnetics.
The large complex is interpreted to be ~26km long and has been confirmed as highly prospective for nickel, copper and platinum group elements (PGE's). Prior to Chalice, the area had never been explored for these metals, and geological mapping of the area was limited due to extensive transported cover.
Chalice interpreted two potential 'feeder' zones within the Julimar Complex as initial areas of interest, one situated at the southern end of the complex on private farmland (the Gonneville Intrusion) and the other situated mid-way along the complex within the Julimar State Forest. Exploration activities to date have largely been confined to private land, however the Minister for Environment has recently approved consent to initial non-ground disturbing activities within the Julimar State Forest under an approved Stage 1 Conservation Management Plan (CMP).
The recent discoveries by Chalice confirm Julimar is an exceptional PGE-nickel-copper-cobalt-gold discovery within a completely new mineral province in Western Australia.
Chalice commenced a systematic greenfield exploration program over the Gonneville Intrusion in mid-2019. The initial drill program commenced in Q1 2020 and resulted in the discovery of shallow high-grade PGE-nickel-copper-cobalt mineralisation. The first drill hole (JRC001) intersected 19m @ 8.4g/t Pd, 1.1g/t Pt, 2.6% Ni, 1.0% Cu and 0.14% Co from 48m. The major greenfield Gonneville discovery defined the new West Yilgarn Ni-Cu-PGE Province.
The Intrusion is interpreted to be a layered mafic-ultramafic 'sill', with a moderate westerly dip and gentle northerly plunge. The potential 'feeder' for the system, a highly prospective area for high-grade mineralisation, is yet to be discovered. PGE-Ni-Cu-Co +/- Au sulphide mineralisation is widespread throughout the Intrusion and has been intersected down to ~850m below surface to date. The intrusion is open to the north into the Julimar State Forest and its depth extent is still unknown.
Eleven high-grade massive / matrix / heavily disseminated sulphide zones (G1-11) have been defined to date over the Intrusion. The discrete high-grade PGE-Ni-Cu-Co +/- Au zones comprise sulphide-rich accumulations (10-100% sulphide, defined by >1g/t Pd cut-off) and typically have a grade range of 1-15g/t PGE+Au, 0.5-3.3% Ni, 0.4-4.5% Cu and 0.03-0.27% Co.
The Intrusion also hosts widespread disseminated PGE-Ni-Cu-Co mineralisation (trace to 3% on average) surrounding the high-grade zones, which typically has a grade range of 0.5-2.0g/t PGE, 0.1-0.2% Mi, 0.05-0.15% Cu and 0.01-0.03% Co.
Weathering at Gonneville extends down to ~30-40m below surface and a well-developed saprolite (oxide) profile after serpentinite contains elevated PGE-Au grades (typically ranging from 1.2-4.5g/t PGE+Au) from near surface to a depth of ~25m.
Early stage metallurgical testwork completed to date on selected high-grade and disseminated sulphide mineralisation samples from Gonneville has returned promising flotation results, giving initial encouragement that the sulphide-hosted mineralisation at Gonneville will be amenable to conventional flotation under standard conditions.
Tests completed on a composite of oxide mineralisation samples has also returned promising results, with the extraction of palladium and gold achieved through oxidative leaching under standard conditions.
An airborne electromagnetic (EM) survey was completed in September 2020 over the entire Julimar Complex. Three new large EM anomalies were identified - Hartog, Baudin and Jansz. The Hartog EM Anomaly extends ~6.5km directly north of the Gonneville Intrusion into the Julimar State Forest.
Initial exploration activities within the Julimar State Forest have now commenced. These low-impact exploration activities will have negligible impact on vegetation, fauna or recreational activities within the area, and will be governed by an approved Conservation Management Plan.
For further information including the latest assay results please click on the following ASX Announcements:
- “High-grade nickel-copper-palladium sulphide intersected at Julimar Project in WA”, 23 March 2020
- "Significant nickel-palladium discovery confirmed at Julimar", 15 April 2020
- "Second Diamond Hole Intersects Discovery Zone at Julimar", 20 April 2020
- “Exciting visual results from deep diamond drill hole at Julimar”, 5 May 2020
- “Large-scale PGE system further expanded at Julimar”, 11 May 2020
- “High-grade Ni-Cu-PGEs confirmed in discovery zone at Julimar”, 25 May 2020
- “Extension of wide, high-grade PGE-Ni-Cu matrix zone at Julimar”, 15 June 2020
- “Significant extension of high-grade PGE-Ni-Cu-Co zones at Julimar”, 17 August 2020
- "Major new 6.5km-long EM anomaly identified at Julimar", 22 September 2020
- "Significant new PGE-copper-gold horizon defined at Julimar", 6 October 2020
- "Significant High-Grade PGE-Cu-Au Extensions at Julimar", 18 November 2020
- "Chalice secures access to major new targets at Julimar", 4 January 2021
- "Four new high-grade zones defined as Julimar continues to grow", 27 January 2021
Chalice is continuing its approach of simultaneously exploring and evaluating the zones of high-grade PGE-Ni-Cu-Co+/-Au mineralisation and the extensive PGE-Ni-Cu zones associated with disseminated sulphides within the ~1.6km x 0.8km Gonneville Intrusion.
Ongoing and planned activities at Julimar include:
- Resource definition drilling – a ~160,000m RC/diamond drill program is underway with 3 RC and 3 diamond rigs. Drilling is initially being undertaken on an 40m x 40m spaced grid over the high-grade areas. This 40m spacing is expected to be sufficient to define mineral resources in the indicated category.
- Down-hole EM Geophysics - DHEM continues to play a key role in identifying potential high-grade targets for follow-up drilling and will be competed on selected holes and in areas of wide-spaced drilling. It is important to note that the lack of an EM target does not necessarily preclude the presence of high-grade mineralisation, based on drill results received to date.
- Metallurgical testwork - Further sulphide flotation and oxide leach testwork in underway on 200kg of composite metallurgical samples, compiled from drill samples collected from various mineralisation styles within the intrusion.
- Geochemistry and Geochronology - the Company has engaged the Geological Survey of WA (GSWA) and a specialist consultant to conduct initial geochemical analysis and metallogenesis studies. This work aims to improve our geological and mineralogical understanding of the discovery and enhance our targeting capability as we search for similar discoveries across our large land holding in the West Yilgarn Ni-Cu-PGE Province.
- Reconnaissance activities within the Julimar State Forest - initial wide-spaced soil sampling and Moving Loop EM programs have commenced at the Hartog AEM Anomaly. Reconnaissance activities will continue over the next 1-2 months. The results of this work will assist in determining whether Julimar has the potential to host multiple Ni-Cu-PGE mineralised systems.
See gallery for JD013 specimen samples (239-264m) and JD002 core photos (30.4-100.3m downhole). To view the full Appendix please click on the following ASX Announcement:
- "Second Diamond Hole Intersects Discovery Zone at Julimar", 20 April 2020
The Julimar Nickel Project was staked in early 2018 and is 100% owned.