Ida Fault Project

The Ida Fault Project spans approximately 233 km² in Western Australia’s Eastern Goldfields, strategically positioned along the Ida Fault—one of the most significant crustal-scale structures in the Yilgarn Craton. This project is designed to capitalize on the region’s proven endowment in critical minerals (notably lithium) and Archaean gold systems.

Geological Setting

The Ida Fault marks the terrane boundary between the Youanmi and Kalgoorlie terranes, extending over 1,000 km and interpreted by both the Geological Survey of Western Australia (GSWA) and the Minerals Research Institute of Western Australia (MRIWA) as a fluid-focusing, crustal-penetrating feature capable of hosting large-scale mineralisation.

Key geological characteristics include:

Proximity to late-stage granitic intrusions, particularly post-regional folding granitoids, known to host lithium-rich pegmatites and gold systems

Structural complexity along the fault zone that facilitates mineral-bearing fluid movement and pegmatite emplacement

Notably, major lithium deposits such as Mount Marion, located further south, share a similar geological setting.

Target Generation and Strategy

Greta Minerals Australia Ltd conducted a desktop target generation campaign across the Ida Fault and neighboring Gecko North Project using:

GSWA geological mapping and structural interpretations

Merged public-domain aeromagnetic and radiometric datasets

Open-file exploration data from historical company activities

This work identified five high-priority regional target zones within the Ida Fault Project area, each showing strong potential for critical minerals and gold:

Northern Fractures: Structurally complex zone at the northern end of the project area, interpreted as a key fluid conduit
Central Granitoid: An area of fertile granitic intrusions with potential for LCT pegmatite and intrusion-related gold systems
Python Zone: Structurally intense terrain with possible greenstone-granite interaction zones
South Dome: Targeting dome-related structural traps prospective for both lithium and gold
Additional Recon Targets: Based on radiometric highs and interpreted shear networks

Exploration Outlook

The Ida Fault Project is being advanced as a core regional play in Greta Minerals’ critical minerals and gold strategy. With major mineralising structures, fertile granites, and validated exploration targeting, the project is well-positioned for tier-one discovery potential.

Next steps include:

High-resolution geophysical and geochemical surveys

Field reconnaissance and structural mapping

Definition of drill-ready lithium and gold targets in collaboration with ongoing work at Gecko North