Project Details

Myrnas Hill Lithium Project

The Myrnas Hill Lithium Project located in the eastern Pilbara region of Western Australia and is highly prospective for Lithium-Tin-Tantalum (Li-Sn-Ta) mineralisation. Myrnas Hill is located approximately 50km from the world-class Pilgangoora Lithium Mine (ASX. PLS) and boasts a similar geological setting with target host rocks strongly analogous to that of the nearby world-class Pilgangoora and Wodgina Lithium Mines.

Myrnas Hill is located adjacent to KZR / SQM JV at DOM’s Hill Lithium Project and KZR Pear Creek Lithium Project where recent exploration success by KZR has identified broad highly anomalous soil sample results and high-grade rock chip sample results.

Myrnas Hill sits exclusively within the LCT Pegmatite “Goldilocks Zone” and covers an area of approximately 50km2 within the highly prospective region of Pilbara, Western Australia, known for delineating some of the world’s largest lithium deposits.

The Myrnas Hill Lithium Project is located less than 30 km north-west of Global Lithium Resources Limited (ASX:GL1) Archer Lithium Deposit (Marble Bar Lithium Project) near Marble Bar containing 10.5MT @1.0% Li2O.

The Myrnas Hill Lithium Project is hosted by several favourable greenstone units and flanked to the east and west by potential granitic source magmas. The northeastern portion of the project is characterised by the same geological units as found at the Archer Lithium Project. The Myrnas Hill Project is flanked by the Pilbara Supergroup, which hosts the Pilgangoora and Marble Bar Lithium projects and the De Grey Supergroup, which surrounds the Wodgina Lithium project.

The figure below shows the general area around the Myrnas Hill Project underlain by the bedrock geology, highlighting granitic and mafic/ultramafic units.

Hyperspectral Remote Sensing Survey

The Hyperspectral program used Sentinel-2 satellite longwave infrared (LWIR), visible/near-infrared (VNIR), and shortwave infrared (SWIR) imagery for interpretation across the Myrnas Hill Lithium Project. The results were most encouraging, and multiple exploration targets were identified using known Lithium-Tin-Tantalum occurrences to characterise the spectral signature of potential lithium occurrences within the area.

The spectral response in the VNIR/SWIR region of the electromagnetic spectrum is purely surficial and can only map soils and outcrops. However, some penetration of the regolith is possible using thermal imagery (Aster LWIR) and reflective interpolations of gasses reaching the surface from decaying material below the surface. An example is the release of hydrogen gas from the decay of ultramafic minerals in the serpentinisation process.

The image below depicts the LCT pegmatite target map and identifies areas of interest requiring field geological follow-up. The mafic/ultramafic geology which hosts the Myrnas Hill project is analogous to the geology which hosts some of the largest hard-rock lithium projects in the eastern Pilbara. Several target areas have been identified.

Targets Generated

The hyperspectral study at the Myrnas Hill Lithium Project identified several high-priority exploration targets using the above methodology. These targets will be the focus of the ground-based field exploration programs at the project, to commence as soon as possible. The initial targets are shown in Figure 4 below.

Hydrogen is the product of the breakdown of ultramafic minerals such as olivine and pyroxenes in the process of serpentinisation.

Since spodumene is a pyroxene mineral, hydrogen may be an effective mapping tool for Aster-based Hyperpsectral interpolations. The hydrogen target map was used in conjunction with the “LCT Pegmatite Target Map” to identify initial exploration targets on the Myrnas Hill Lithium Project.

Another useful exploration tool is satellite imagery, especially since LCT pegmatites are often found in dykes and/or dyke swarms which may be visible on high-quality satellite imagery. The Company is very pleased by the correlation between visible dyke-like features identified using the satellite imagery of the tenement and the targets identified by the hydrogen target map.

High definition satellite imagery has also identified a dyke-like feature which correlates with the hyperspectral target maps. This will be a high-priority target for the planned field program.

Additional Exploration Potential

The Myrnas Hill Lithium Project also includes the upside of potential gold mineralisation alongside the extensive lithium (LCT-type pegmatite) potential on the project area. Historical drilling has intersected several gold intercepts greater than 1g/t Au.