Calidus Resources Limited announced that it has a 50% interest in a new Pilbara lithium exploration company. The company, Pirra Lithium Pty Ltd. (Pirra Lithium), is owned equally by Calidus and Haoma Mining NL (Haoma). Pirra Lithium will be assigned tenements and lithium rights across the most prospective lithium ground in the Calidus and Haoma portfolios.

These tenements and lithium rights cover 1,063km. Substantial pegmatites have already been mapped on the tenements, several of which are associated with known tin-tantalum fields. Pirra Lithium has access to tenements totaling 1,063km2.

The tenements were selected based on lithium prospectivity from Calidus' and Haoma's extensive landholdings in the East Pilbara. Across the Pilbara Craton, including at Wodgina, Pilgangoora, and Global Lithium's Archer deposit near Marble Bar, lithium is hosted in pegmatites associated with granites of the 2890-2830 Ma Split Rock Supersuite. Abundant granites of the Split Rock Supersuite are present on tenements on which Pirra Lithium has the lithium rights.

There is also a strong spatial coincidence between the location of lithium discoveries with historic tin and tantalum fields; for instance, the Archer lithium deposit and the Moolyella tin field, the Wodgina lithium deposit and the Wodgina tin field, and the Pilgangoora lithium deposit and the Pilgangoora tin deposits. In the Spear Hill (Pirra) area, tin deposits of the Shaw River tin field2 are associated with granite and pegmatite of the Split Rock Supersuite. In the late 1980s Greenex documented the occurrence of lepidolite in pegmatites in the field in their pre-feasibility study of alluvial tin-tantalum deposits for Western Australia Rare Metals Co.

Ltd. and Greenbushes Ltd. The various tenements will be initially ranked for their lithium potential. For the priority target areas, field mapping will be carried out immediately to determine the distribution, size, orientation, and mineralogy of the pegmatites. Particular attention will be paid to the nature of any lithium-bearing minerals (e.g., spodumene, lepidolite).

A handheld laser-induced breakdown spectroscopy (LIBS) analyser will be used to confirm the presence and composition of lithium minerals during field mapping. This will enable rapid identification of the priority areas for drilling, and for applications for Programs of Work (PoWs) to be submitted to DMIRS and requests for heritage surveys to be submitted without delay. Representative samples will be sent to a laboratory in Perth to provide more precise and accurate determinations of lithium concentrations.

In addition, studies will be carried out to determine the deportment of lithium in the samples.