Blue Devil Target - Targeting Copper & Gold
Figure 1: Blue Devil 3D - AEM & Intrusion model inc Red Devil IP model
Figure 2: Blue Devil 3D inversion model, Western & Northern EM conductors, Magnetic intrusion and splay faults.
TechGen has unveiled exceptional geophysical targets from its 100%-owned Blue Devil Project in Western Australia. These targets, identified through the project’s first-ever Airborne Electromagnetic (AEM) and magnetics survey, mark a significant milestone in the exploration history at Blue Devil. This groundbreaking airborne survey, conducted with Expert Geophysics Pty Ltd’s cutting-edge TargetEM 12.5 Hz system, flown for the first time in Australia has delivered remarkable insights into the project’s potential.
The Blue Devil project is located in the Halls Creek Orogen of Western Australia and consists of exploration licences E80/6047, E80/6084 and E80/6101 covering a combined area of 195km2.
Figure 3: Airborne Magnetics.
Figure 4: Airborne Geophysics, Blue Devil target.
(Both images have known +1% copper and + 1g/t gold included)
BLUE DEVIL - STRATEGIC HIGHLIGHTS
Airborne EM 12.5Hz airborne EM (TargetEM) system: The 12.5Hz EM system has delivered an outstanding and large bedrock conductor at approximately ~200m depth, the anomaly is broken into three zones (BDW, BDE & BDN):
BDW = Western, +2.5km long strong anomaly centre within overall broader conductive complex, with deeper level and or a thicker conductive source. Steep westerly dipping, wrapping around a broad/deep level magnetic intrusive body with local NE structural control.
BDE = Eastern, +1.5km strong anomaly centre within overall broader conductive complex – possibly with a deeper level or a thicker conductive source. Wrapping around a broad/deep level intrusive magnetic body with local ENE structural splay fault.
BDN = Northern, +300m strong anomaly centre within overall broader conductive complex either deeper level or a thicker conductive source. Also wrapping around a broad/deep level magnetic intrusive body, with local NE structural control.
Airborne Magnetics: A significant localised magnetic feature, probable intrusion, has been modelled approximately ~100-400m immediately below the EM conductor plates (BDW, BDE & BDN). The magnetic intrusion may be a source for mineralising fluids and several significant mineral deposit styles are related to intrusions.
Mineralisation - Copper & Gold: Copper and gold bearing iron-rich units (gossans) and quartz veins have previously been mapped across the project area. Encouraging previous rock chip samples above or in very close proximity to the EM conductors when they are projected to surface include 12.3% & 5.81% Cu and 6.07g/t, 5.78g/t, 3.0g/t, 3.12g/t & 1.28g/t Au (Sipa).
A significant first mover advantage: The first ever EM survey at Blue Devil and the first ever 12.5Hz TargetEM system flown in Australia. Airborne EM is well suited to identifying massive sulphide occurrences and the 12.5Hz TargetEM system was specifically selected for this purpose at the Blue Devil copper/gold project.
Controlling structures: Several major faults run through the project area (Figure 3). The EM conductors appear to be coincident with major faults. The magnetic anomaly sits between two major faults. The structural setting is favourable for producing potential mineralisation sites.
Previous rock chip peak values of 50.5% Cu, 6.9g/t Au & 53g/t Ag.
15 of 34 previous rock chip samples by Spartan Exploration Pty Ltd recorded above 1% Cu with a peak of 50.5% Cu.
10 recorded copper-gold samples associated with favourable gossan mineralisation, malachite, chalcocite, cuprite (copper carbonates) within boxwork goethite, haematite (iron) gossanous occurrences over the length of the tenement.
Multiple ages of mineralisation previously documented.
Excellent historical geochemistry and mapping database.
Previous drilling on project target lead and zinc horizons to the east and no previous geophysics or drill testing of high-grade copper-gold occurrences.
Targeting intrusion, IOCG, SEDEX and shear related Cu-Au-Ag mineralisation systems.
The Blue Devil Project is on Exploration Licence E80/6047 located 45km east northeast of Halls Creek in Western Australia and accessible through station and exploration tracks. The project consists predominantly of outcrops of the Olympio Formation, of the Halls Creek Group. This unit is a weakly to moderately metamorphosed sedimentary unit consisting of mudstone, siltstone, sandstones, greywacke, quartz wacke, and arkose. It is interpreted to be turbiditic in origin. Overlying the Olympio Formation, several very prominent ridges of Ruby Plains Group sediments are present. These ridges consist of a very shallow easterly-dipping sandstone unit known as the Mt Kinahan Sandstone.
RED DEVIL – IP TARGET
Figure 5: Red Devil 3D IP inversion model with new (July 2026) surface rock chips shown in red and historic in black. Planned drill hole trace.
Red Devil - an Induced Polarisation (IP) geophysical survey was completed to cover a northwest – southeast shear zone marked by outcropping high-grade iron-quartz-copper-gold gossans. The IP survey identified a compelling high chargeability IP target. The strong chargeability feature has a core zone of ~30-35mV/V IP within a broader more extensive zone of ~20mV/V. The core ~30 - 35mV/V IP zone is ~175-225m below surface and is ~300m in vertical thickness. Background levels are estimated at <10mV/V and so the IP target is >3X background levels. IP anomalism correlates with high resistivity in the basement units. The Red Devil target has recorded several high-grade copper and gold rock chip samples with peak values of 52.3% Cu and 5.35g/t Au (Figures 4 & 5).
Figure 6: Red Devil IP Target (Red Oval) new (green) and historical (maroon) copper, gold and silver iron/quartz gossan rock-chip grades.
Figure 7: TechGen Kimberley project location with reginal mines and mineral occurrences.