|Location||Avon Region, Western Australia|
|Development Stage||Advanced Exploration - new discovery in March 2020|
|Acquired||Staked in 2018 and subsequently expanded|
Julimar is a globally significant discovery, and Australia’s first major palladium discovery.
The greenfield Project was staked in 2018 as part of Chalice’s global search for high-potential nickel sulphide exploration opportunities.
Chalice interpreted the possible presence of a mafic-ultramafic layered intrusive complex (the ‘Julimar Complex’) based on high-resolution airborne magnetics. The Julimar Complex is interpreted to extend over ~26km of strike and is confirmed to be highly prospective for nickel, copper and platinum group elements (PGE).
Prior to Chalice’s major discovery, the Julimar Complex had never been explored for Ni-Cu-PGE mineralisation, and the lack of any significant bedrock geology exposures and widespread development of laterite and transported cover in the region hindered the confirmation of the conceptual geological model.
Exploration activities to date had largely been confined to the ~1.8km x >0.9km Gonneville Intrusion, located on partly Chalice-owned private land, while the access approval to the remainder of the Julimar Complex within the Julimar State Forest was pending.
Take a 3D tour of Julimar - click here.
Chalice commenced a systematic greenfield exploration program over the Gonneville Intrusion in mid-2019, with all drilling to date conducted on private farmland. 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 discovery at Julimar defined the new West Yilgarn Ni-Cu-PGE Province.
The Gonneville 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 Gonneville 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 within the Gonneville 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 Goneville Intrusion also hosts widespread disseminated PGE-Ni-Cu-Co mineralisation (trace to 3% sulphides, 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 (AEM) survey was completed in September 2020 over the entire Julimar Complex. Three new large AEM 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. Reconnaissance activities over the new targets have been conducted under a Stage 1 Conservation Management Plan, approved by the Minister for the Environment.
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
- "New highly prospective EM conductors and nickel-copper soil anomalies defined at Hartog Target, Julimar Project", 25 March 2021
- "Resource drilling at Julimar delivers further growth in high-grade zones", 22 April 2021
Chalice is continuing the resource definition drill program and early studies at the ~1.8km x >0.9km Gonneville Intrusion in parallel with the initial exploration activities within the Julimar State Forest to the north.
Ongoing and planned activities at Julimar include:
- Resource definition drilling (Gonneville) – The RC/diamond drill program aims to define Mineral Resources predominantly in the Indicated category to a nominal ~200m below surface (deeper in high-grade zones), which is expected to be achieved with a 40m spaced drill pattern. Areas deeper than ~200m below surface are being drilled on a wider spaced pattern, as determined by preliminary pit-shell modelling, with the Mineral Resources expected to be reported predominantly in the Inferred category. Due to the continued growth of mineralised zones and the required drilling, the Company anticipates its maiden Mineral Resource Estimate will be released in late Q3 2021.
- Metallurgical testwork (Gonneville)- variability flotation testwork on sulphide zone composites and leach testwork on oxide zone composites continues. New high-grade and disseminated sulphide composites have been complied for the next phase of testwork.
- Mining studies (Gonneville) - hydrology, hydrogeology, waste rock characterisation and initial infrastructure studies have commenced. The Company as appointed a Study Manager for the Project and anticipates that a scoping study will be released in early 2022.
- Marketing studies (Gonneville) - preliminary discussions with various potential offtake partners have commenced, to determine indicative commercial terms for potential intermediate concentrate products.
- 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 landholding in the West Yilgarn Ni-Cu-PGE Province.
- Reconnaissance exploration and environment surveys within the Julimar State Forest - Soil sampling continues at the Jansz Target and ground gravity is underway within the Julimar State Forest. Flora and Fauna surveys are underway as part of planning for additional exploration activities as well as providing baseline information for future studies.
For information on Chalice's activities within the local area, please refer to our Fact Sheets on the Community - Julimar Project page.
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.