What did Middle Island Resources (ASX:MDI) discover at the Priboj Project?

Middle Island Resources confirmed a large-scale gold system at its Zabrnjica target in Serbia, an area with no prior history of modern gold exploration. Soil sampling identified a consistent anomaly 600 metres long and 200 metres wide, with gold concentrations peaking at 38 parts per billion.

Why is the Zabrnjica gold discovery significant for MDI shareholders?

The discovery is significant because it establishes Middle Island Resources as a "first-mover" in a previously unexplored but highly prospective mineral belt. By identifying a system that mimics the geological signature of world-class deposits like Donlin Creek in Alaska, the company has high-conviction targets for its upcoming drilling.

What were the key technical results from the recent sampling at Priboj?

The exploration program yielded two primary sets of data: soil assays and rock chip samples. Infill soil sampling defined a central anomaly of more than 10ppb gold across a 600m x 200m area, while rock chip samples from outcrops returned grades up to 0.68g/t gold.

What is the immediate next step for Middle Island Resources (ASX:MDI)?

The company is fast-tracking an initial five-hole reverse circulation (RC) drilling program at the Zabrnjica target to test the altered gold-mineralised sediments. This drilling is scheduled for completion during the current field season, pending final land access approvals.

Is Middle Island Resources only focused on gold in Serbia?

No, the company is diversifying its Serbian portfolio by targeting copper at the adjacent Jermovac and Priboj licences. MDI plans a three-hole RC drilling campaign at the Jelaca prospect to target volcanogenic massive sulphide mineralisation.

How does the geological "replacement-style" label affect the investment thesis?

Replacement-style systems are prized by explorers because they have the potential to host multi-million-ounce gold deposits with high continuity. While this comparison is currently based on surface signatures and remains a potential scenario rather than a guarantee, it elevates the Priboj project from a minor prospect to a "company-maker" target.

What are the primary risks for MDI investors following this news?

Despite the positive surface data, Middle Island Resources remains in a high-risk exploration phase with a low share price of $0.039. Key risks include the "truth machine" of drilling—where sub-surface results may not match surface anomalies—and the requirement for ongoing land access approvals in Serbia.

What are the bull and bear cases for Middle Island Resources (ASX:MDI) short term?

The bull case rests on the upcoming RC drilling hitting significant gold intercepts, which could lead to a rapid upward re-rating of the share price. The bear case involves drilling failing to find economic grades or delays in land access approvals stalling the current field season’s momentum.

Image for illustrative purposes only. Not a real photo.

Middle Island Resources uncovers gold target at Priboj Project

Written by Isaac FrancisPublished Mar 11, 2026, 6:27 AMLast Updated Jul 6, 2026, 10:43 AM

Middle Island Resources (ASX:MDI) announced the confirmation of a significant, large-scale gold system emerging at the Zabrnjica target within its wholly owned Priboj Project.

The discovery marks a pivotal moment for the region, which has lacked any recorded modern gold exploration until now.

Recent infill soil sampling, comprising 146 distinct samples, has defined a coherent gold-in-soil anomaly extending over an area 600m long and 200m wide, with assay results peaking at 38 parts per billion.

Experts suggest this signature is consistent with substantial replacement-style gold systems, drawing technical parallels to world-class deposits such as the multi-million-ounce Donlin Creek in Alaska.

Surface exploration has further bolstered confidence, with rock chip samples from outcrops returning grades up to 0.68g/t gold, while float samples reached as high as 1.91g/t.

CEO Peter Spiers confirmed that the company is fast-tracking a five-hole reverse circulation drilling campaign scheduled for the current field season.

Beyond gold, Middle Island is diversifying its Serbian portfolio with copper-focused exploration at the adjacent Jermovac licence.

This includes a planned three-hole RC program at the Jelaca prospect to investigate volcanogenic massive sulphide-style mineralisation, where previous rock chips have assayed as high as 10.3% copper.

Spiers noted that Priboj offers "meaningful first-mover discovery potential" within a prospective mineral belt, positioning the company for potentially transformative growth.

At the time of reporting, Middle Island Resources' share price was $0.039.

Middle Island Resources uncovers gold target at Priboj Project

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