The acquisition of the Koongulla Project in the Paterson Province in north-west Western Australia further strengthens Boadicea’s resolve to be located in Australia’s most prospective exploration regions.
The Koongulla Project consists of four (4) tenements, two (2) granted and two (2) in application. These cover a total area of 885km2. The tenements are:
- Koongulla – EL45/5392 (95% BOA owned) – granted
- Koongulla North EL45/5818 (100%BOA) – granted
- Koongulla East EL45/5866 (100% BOA) – application
- Koongulla South EL45/5959 (100% BOA) – application
Figure 1 Koongulla Location
Airborne geophysics completed in December 2020 has identified an interpreted dome feature in the southern area of the project area. The Koongulla Dome is interpreted to have similar dimensions and orientation to the Telfer Dome (see Figure 2) which is host to 32Moz of gold and 1Mt of contained copper. This provides Boadicea a clear exploration target for gold copper mineralisation in one of the most prospective areas in Australia.
Figure 2 Koongulla and Telfer Dome Comparison
On 25 June 2020 Boadicea acquired a 95% interest in the Koongulla Project (E45/5392) located in the Paterson Province of northern Western Australia. The Licence E45/5392 was granted on 3 February 2020 for a period of five (5) years and is 240 km2. Additional adjacent tenements have been applied for during 2020 and 2021 taking the total holding to 885km2.
Figure 3 Koongulla Tenement Position
Following a preliminary assessment of open geophysical data an airborne magnetics survey was flown in November 2020 and completed in December 2020 (see ASX announcement 23 December 2020). GPX Surveys was engaged to conduct the aeromagnetic survey on 100m spaced, east–west oriented lines for a total 5,259 line kilometres. This represents a significant improvement in data resolution, with the tenements only previously covered by regional open file surveys. Assessment of the results were completed by Boadicea’s geophysical consultant Southern Geoscience Consultants (SGS) and announced to the market (see ASX announcement 12 March 2021).
Results indicated complex geology beneath the cover of Canning Basin Sediments and identified a total of five (5) potential targets.
The location of the interpreted features is presented in Figure 4.
- K1 – Potential intrusive complex
- K2 – Complex magnetic zone
- K3 – Structurally complex zone
- K4 – Interpreted dome structure, referred to as the Koongulla Dome
- K5 – Major fault/domain break, major basin structure
Figure 4 Koongulla Total Magnetic Intensity with Key Interpreted Features
The most significant structure identified is interpreted to be a Telfer look-a-like dome structure, and this is considered to be an exciting target for Telfer style copper/gold mineralisation.
The interpretation is that this dome structure has been identified within an initial estimation of 200m to 250m of cover, which means it is within the capacity for Boadicea to drill the dome.
Following successful completion of a heritage agreement, land access, and the ground-based gravity survey over the dome feature, Boadicea expects the dome will be tested by diamond drilling in Q4 2021 or early 2022.
The interpreted dome structure is believed to straddle an area within EL45/5392 and EL 45/5866.
In Boadicea’s ASX announcement on 12 March 2021 the company is planning follow up activities on testing the Koongulla dome structure for Telfer style mineralisation initially with additional airborne geophysics planned to complete the survey across the dome feature within E45/5866.
The Paterson Province covers around 30,000 km2 to the east of the Hamersley Basin and southwest of the Canning Basin. The region is highly prospective for large scale stratiform copper(Winu), intrusion related copper-gold (Haverion) and sediment hosted copper gold Telfer style deposits. The Koongulla Project lies 50km from Havieron and 80km from Newcrest’s major Telfer gold mine.
Figure 5 Paterson Province Tenement Ownership
The district has seen a pegging rush in recent years, including major discoveries such as Rio Tinto’s Winu project which has a strike length exceeding 2km, and drill hole intercepts including 155.1 metres at 0.41% copper, 0.38g/t gold, and 2.39g/t silver. Rio Tinto has estimated (Rio Tinto media release 28 July 2020) an Inferred Mineral Resource, reported at a 0.2% copper equivalent cut-off of 503Mt at 0.45% copper equivalent (CuEq). This includes a higher-grade component of 188Mt at 0.68% CuEq at a cut-off grade of 0.45% CuEq.
Meanwhile, Greatland Gold plc has reported spectacular follow-up drill results in the Havieron prospect (discovered by Newcrest some years ago). These include:
- 121.0m @ 2.93 g/t gold and 0.23% copper from 497m down hole in HAD001;
- 275.0m @ 4.77g/t gold and 0.61% copper from 459m down hole in HAD005
- 136.0m @ 2.9g/t gold and 0.6% copper from 504m down hole in HAD034
In December 2020, Newcrest announced an initial Inferred Mineral Resource Estimate for the Havieron Project of 3.4Moz of gold and 160kt of copper. Outside of the estimated Inferred Mineral Resource, mineralisation remains open with results indicating the possibility that the resource could grow over time with additional planned drilling activity.
The Havieron mineralisation consists of pyrrhotite-chalcopyrite-pyrite in a Proterozoic brecciated limestone and silty limestone, lying beneath 400m of Permian clastic rocks. There is a coincident magnetic and gravity high which guides exploration. A dyke occupies the mineralised breccia zone at Havieron; it is apparent from magnetics that this dyke and structural disruptions trend north from Havieron into E45/5392.