Mortimer Hills Project

The main Mortimer Hills Project comprises one granted exploration licence, E09/2147, which is located 5 km east southeast along strike from the Yinnietharra Lithium Prospect ( being developed by Delta Lithium Limited (ASX: DLI). The Company notes that neighbouring DLI’s drilling on its Yinnietharra Project on Zeus’ western boundary has encountered the bulk of its pegmatites at depths of between 50-200 m (See DLI ASX Announcement, 23 June 2023).

The Zeus tenements lie within the heart of the Proterozoic Gascoyne Province, positioned more broadly within the Capricorn Orogen — a major zone of tectonism formed between the Archean Yilgarn and Pilbara cratons. The Mortimer Hills Project sits along the northern edge of the Mutherbukin Zone, along the Ti Tree Syncline and dominated by the Thirty-Three supersuite, a belt of plutons comprised primarily of foliated metamonzogranite, monzogranite and granodiorite in contact with the Pooranoo Metamorphics.

Rare-earth and lithium bearing pegmatites have been identified on the Mortimer Hill Project and in particular at the nearby Yinnietharra Lithium Project being developed by DLI, in the vicinity of the Thirty Three supersuite granites in the area.

DLI’s Yinnietharra Project immediately to the west of Zeus’ E09/2147 tenement has identified the Thirty-Three Supersuite as a fertile parent granitoid with the potential to generate LCT Pegmatite swarms up to 500 to 3,000 m out from the parent granitoid.

The Thirty-Three Supersuite and Morrissey Metamorphic Suite extend east-southeast from the Yinnietharra Project (DLI) into Zeus’ tenement. Zeus therefore considers that E09/2147 has substantial potential for host-related LCT Pegmatite mineralisation. Extensive tourmaline alteration of the country-rock found within the tenement also suggests the Thirty-Three Supersuite is highly fractionated and has the potential to generate LCT Pegmatites.

Figure 1 – Mortimer Hills Project Tenements Locations