Broken Hill

Exploration | Western Australia

The Broken Hill Project surrounds the world-class Broken Hill silver–lead–zinc deposit, which has produced over 500 million tonnes of massive sulphide ore since its discovery in 1883.

Impact Minerals (ASX: IPT) holds 100% of tenements covering approximately 2,000 square kilometres and more than 100 kilometres of prospective strike surrounding that historical mining district.

Exploration Targets

Impact’s tenure is prospective across three distinct mineralisation styles:

Magmatic Nickel-Copper-PGM Sulphides At the Platinum Springs, Red Hill, and Rockwell–Little Broken Hill prospects, high-grade magmatic nickel-copper-PGM sulphides are associated with late-stage (820 Ma) ultramafic to mafic intrusions.
Broken Hill-Style Silver-Lead-Zinc Impact is exploring for base and precious metal sulphide mineralisation — chiefly silver, lead and zinc — within the same Broken Hill geological domain that hosts the world-class Broken Hill orebody.
Large Sedimentary/Magmatic Copper Systems Impact’s exploration model suggests a large copper deposit exists below the silver-lead-zinc mineralisation that has historically dominated exploration efforts. Impact’s interest in copper arose from discoveries at the Dora East prospect, where high-grade silver-lead-zinc mineralisation was found alongside copper.

Timeline

2016

Initial High-Grade Discovery In 2016, Impact drilled at the Platinum Springs prospect, uncovering high-grade sulphides in drill core — intersecting 0.6m grading 11.5 g/t platinum, 25.6 g/t palladium, 1.4 g/t gold, 7.6% copper, and 7.4% nickel.

2020

COVID Curtailment & Technical Breakthrough Exploration at Broken Hill was initially cut back due to COVID during 2020–2021. Despite this, Impact developed its proprietary XRF multi-metal ratio technique during this period, defining the first consistent zones of higher-grade nickel–copper–PGE mineralisation in four decades of exploration, showing it occurs in ribbon-like channels at the base of the host intrusion, similar to those that host the world-class Kambalda nickel deposits.

Nov 2021

IGO Farm-In Agreement Impact inked a farm-in agreement with a subsidiary of IGO over its Broken Hill nickel/copper/PGM project. Under the terms, IGO could earn an initial 51% in the project area by spending A$6 million on exploration over four years, with the option to spend a further A$12 million over the subsequent four years to earn a 75% interest.

May 2022

Major EM Conductor Identified Impact and IGO identified a large and strong electromagnetic conductor — 420m by 85m at a depth of about 350m — located about 1,000m from drill hole PSD002 that had intersected massive sulphide. The conductor lay within a major shear zone interpreted to be a possible feeder zone for the extensively mineralised nine-kilometre-long Moorkai Trend.

Late 2022

IGO-Funded Drilling at Yellowstone Prospect IGO secured a drill rig, allowing Impact to fit drilling at Broken Hill into the last leg of the 2022 calendar year. Two diamond drillholes targeted electromagnetic anomalies interpreted to be possible nickel-copper sulphides at the Yellowstone prospect.

2023

BHP Xplor Program & IGO Withdrawal Impact was selected for BHP’s inaugural ‘BHP Xplor’ program. The incubator model approach accelerated Impact’s development of a magmatic-hydrothermal copper model associated with the ubiquitous Willyama Amphibolites. 2023 saw the first regional magnetotelluric survey line in Broken Hill, as well as tight-spaced audio-magnetotelluric survey centred on Dora East and Red Hill. This survey was also accompanied by a sub-audio magnetics survey, the results of all of which led to a re-interpretation of the structure and mineralisation architecture of the Dora East mine area. A second outcome of the Xplor program was the formulation of a copper exploration model designed to uncover further analogues to the Copper Blow prospect.

Mar 2025

Major Land Acquisition Impact Minerals acquired New Frontier Minerals’ Broken Hill East project — a 675 sq km tenement package — increasing its total land package to 1,770 sq km, nearly surrounding the Broken Hill mine. The acquisition terms involved Impact purchasing BHA No 1 Pty Ltd for $275,000 in Impact shares.

Nov 2025

Resumption of Exploration Impact Minerals announced the resumption of exploration activities at its 100%-owned Broken Hill Project, underpinned by rising metal prices, new exploration concepts, and increased corporate activity in the region. A ground magneto-telluric survey was underway to define drill targets for 2026.

Feb/Mar 2026

MT Survey Results & Conductive Corridor Impact Minerals identified numerous near-surface conductive targets following the in-fill magnetotelluric survey conducted in Q4 2025. The data highlighted a conductive corridor extending from approximately 20 kilometres depth toward the surface within its tenure, suggesting a potential lithospheric-scale mineral system. Three near-surface conductive zones — labelled T1, T2 and T3 — were defined, with follow-up work confirming a discrete conductor at the top of the priority T3 anomaly.

LOOKING AHEAD

Mid 2026

Mid 2026 drilling programmes are planned across multiple prospects, testing the three distinct mineralisation styles identified across the project area. The company is awaiting final inversion results from a follow-up MT survey over T3 to refine drill targets within what it interprets as a large-scale mineral system architecture.

The Broken Hill Project remains a significant and evolving part of Impact Minerals’ portfolio, underpinned by a substantial land holding, proprietary exploration technology, and renewed regional interest from other major players including Broken Hill Mines and South32.

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