Mantle Minerals Limited announced the re-commencement of gold exploration at Roberts Hill, part of the Company's Mallina gold project, immediately north of De Grey Mining Limited's discovery of 10.6M ounces of gold at Hemi and satellite deposits. After a recent geochemical review of the 2021 aircore drilling, it is interpreted that Mantle intersected Hemi-style mineralisation at Roberts Hill. Follow-up exploration activities have been initiated with a soil geochemical survey, to identify the most effective and systematic way to define drilling targets over the extensive tenement holding.

Geochemistry is one of several methods to be used, including geophysics, regional structural geology and detailed studies of previous drilling. The Roberts Hill project is located within an interpreted gold trend extending from Whim Creek and Toweranna gold mines eastwards through Hemi and potentially beyond. The area is easily accessed by 45 minutes drive south west of Port Hedland along the Great Northern Highway.

The soil orientation survey is designed to pass over significant intersections from air core drilling in 2021, particularly hole RHAC147 (4m @0.42g/t gold and 848ppm arsenic), which confirms Hemi-style mineralisation. Over 750 soil samples will be collected from two separate areas, on a 100m x 100m grid spacing, to demonstrate possible soil anomalies above mineralization. The first series of soil samples form a grid of 100x100m spacing over a cluster of intersections of gold mineralisation, which occur in three different types of settings: in-situ (semi-fresh rock), supergene (weathered rock) and transported (within the concealing sediments).

The occurrence of gold within these three settings together is encouraging. The soil orientation survey is designed to test possible mobilisation of this gold and associated arsenic into the surface soils, to identify anomalies reflecting primary gold mineralisation. The second series of soil sampling lines at 100m spacing are designed to test a soil possible response to a second cluster of gold mineralisation.

The three sampling lines should be sufficient to determine a geochemical response to potential primary gold mineralisation in this area. Results from the survey are expected during May. Should these soil results highlight the potential for mineralisation below, the survey will be extended over other areas of the tenements, to define potential gold exploration targets that could be drilled later this year.