The Mt Boggola Project is located 60km to the south of Paraburdoo within the Ashburton Region.
The project comprises two Exploration Licences, E08/2996 and E08/3269 covering a combined area of 179 km2 and 100% owned by the Company. The project area contains a 30km strike of the unconformity between the two basins and is located in the Proterozoic-aged Ashburton and Edmund Basins.
Recent results of an Induced Polarisation (IP) geophysical survey have now been received from the Mt Boggola Project identifying two high priority chargeability targets both present across two adjoining survey lines each approximately 400m x 150m in area.
Figure 1: IP chargeability targets, previous exploration & recent rock chips on airborne magnetics image.
Figure 2: Target MB1 & MB2 East-West IP high chargeability 3D model showing the resistivity (aqua) component.
Chargeability target MB1 has greater than three times background levels, > 34 mV/V against background levels of approximately 10mV/V (Figures 1 & 4). The chargeability target corresponds to a resistivity low zone and 2D and 3D inversion modelling results suggest a relatively shallow depth from surface to the top of the anomalism of 75-100 metres (Figure 5). Rock chip sampling (38 samples), previous companies and by TechGen, has been undertaken within the 400m x 150m chargeability target area and 13 of the 38 rock chip samples returned >1% copper with a peak assay result of 10.5% copper (Photos 1 & 3; Figure 2 & 3).
Chargeability target MB2 is not quite as strong as target MB1 with chargeability of > 28 mV/V against background levels of approximately 10mV/V (Figures 1 & 4). The MB2 target also corresponds to a resistivity low zone (Figure 5). Rock chip sampling (23 samples), previous companies and by TechGen, have been undertaken in the MB2 chargeability target area and 14 of the 23 rock chip samples returned >1% copper with peak assay results of 32.6% Cu, 48.8g/t Au and 3.92% Sb (Photo 2; Figure 2 & 3).
The IP survey consisted of four 200m spaced north – south oriented Dipole-Dipole (DDIP) lines covering a combined length of 5km. The IP survey was undertaken to cover the eastern portion of the Northern Star soil & rock chip anomaly.
Figure 3: MB1-MB4 IP Targets, soils, rock chips & planned drilling, Mt Boggola Project.
Northern Star Resources Limited held parts of the current project area between 2015 – 2018 and undertook detailed soil sampling over an area that had malachite bearing gossans and an underlying gravity feature they interpreted might represent an intrusive body. Northern Star Resources Limited were targeting intrusion-related gold mineralisation in the project area. The soil anomaly Northern Star outlined has coincident copper and arsenic oriented in a northwest – southeast direction, gold anomalism is smaller in extent but in the same orientation whilst the lead soil anomaly is only partially coincident. The soil anomaly is possibly related to a large-scale northeast-southwest striking fault structure that runs through the area. The Northern Star Soil Anomaly has peak values of 1,070ppm Cu, 60ppb Au, 240ppm As and 593ppm Pb. High grade rock chip results returned from the soil anomaly area include gold (48.8g/t, 34.5g/t, 7.73g/t, 4.82g/t & 3.47g/t), copper (27.8%, 20.3% & 16.75%), antimony (3.92%, 3.51% & 2.27%) and lead (3.72%, 1.38% & 1.04%; TG1 ASX announcement 26/11/2024).
The identified chargeability targets, MB1 & MB2, have not previously been drill tested but there are five drill holes completed by Newcrest Mining in 1991 located to the north of the MB1 target (Figure 2 & 3). The closest drill hole, hole PB12, is approximately 100m north of the chargeability target and was drilled towards the northeast away from the target. Drill hole PB12 returned a best assay result of 1 metre @ 0.8% copper from 88m downhole.
The IP chargeability target zones MB1 and MB2 will be prioritised for future drill testing.
Figure 3: IP chargeability lines, previous drilling and rock chips, Mt Boggola Project.
*Easting location on rock chip samples may vary +/- 100m to fit on IP survey line/s.
Figure 4: IP resistivity lines, previous drilling and rock chips, Mt Boggola Project.
*Easting location on rock chip samples may vary +/- 100m to fit on IP survey line/s.