The Company’s main focus at Juno is targeting Intrusion Related Gold Systems (IRGS) similar to Havieronand Telfer. Havieron and Telfer are large gold and copper deposits located in the north of Western Australia.
Gold and copper mineralisation at Havieron was discovered following exploration drilling of a strong discrete magnetic feature. Havieron also displays a coincident gravity response.
Geo has targeted the northern parts of E08/3497 as its initial area of focus. Processing and imaging of aeromagnetic data covering the northern portion of the main Juno magnetic feature is complete (Figure 1). Imaging has revealed the data is of high quality and very detailed in nature.
The new aeromagnetic data confirms the location, highlights the strong intensity and verifies the large size of the Juno magnetic feature. This new detailed aeromagnetic data reveals structures and other features not seen in historical, lower resolution, magnetic data. The aeromagnetic survey was carried out during October 2024 using a fixed wing aircraft at 50m line spacing.
Figure 1 – Newly acquired 50m line spaced data overlayed on historic 400m line spaced data.
- Analysis confirms a significantly large residual gravity response
- Large gravity response spatially aligns with prominent magnetic feature at Juno
- Alignment is typical signature of IRGS style mineralisation as per Havieron copper gold deposit.
Ground gravity data was collected over the central north of the Juno Project area from late November to mid December 2024. A total of 1400 ground gravity observations were taken at station spacings of 400m x200m, and 200m x 200m where added resolution was required. Post processing and imaging of the gravity data was completed during late December 2024 and early January 2025. Delivered products include high resolution raw and residual gravity data.
The newly acquired 2024 ground gravity data has successfully confirmed the gravity response that was initially suggested by the historic work from the 1990s. Importantly, the Company’s recent detailed and spatially accurate gravity work has successfully identified a significant residual gravity response that is coincident with the large magnetic response at Juno (Figure 1).
The residual gravity response covers an area of approximately 4km x 2km (8sq kms) with a peak amplitude of 2mgal. The magnetic feature covers an area of approximately 5km x 2km (10sq kms) with a peak response of +1000nT. Coincident magnetic and gravity response of this size and amplitudes is consistent with IRGS and IOCG (Iron Oxide Copper-Gold) type deposits.
The Company is targeting IRGS type mineralisation at Juno. By comparison, Havieron, a large IRGS gold and copper deposit (+8Moz gold equivalent) located in the north of Western Australia, displays a 1km x 1km (1 sq km) magnetic response with a coincident gravity response peaking at 0.5mgal. The intensity of the gravity response at Juno is more elevated than Havieron, and the footprint of the coincident response at Juno is several times larger which illustrates the significant size of the opportunity at Juno.
Figure 1 – Juno Aeromagnetics and Ground Gravity
Several historic exploration holes have been attempted at Juno since the mid 1990s to the early 2000s (Figure 2). Several holes targeted the large Juno magnetic feature but failed to reach the target depth due to limited capacity drilling equipment. Modern drilling equipment has the ability to overcome these earlier shortcomings, and advanced modelling of detailed subsurface geophysical data provides accurate 3D models for efficient drill targeting.
Figure 2 – Juno Project Aeromagnetics (image) with Residual Ground Gravity (contour) and historic drilling.
