Godolphin Resources Completes 218-Hole Yeoval-Goodrich Copper-Gold Drill Programme

Godolphin Resources Drills 218 Holes at Yeoval-Goodrich, Targets Potential Porphyry Copper-Gold System Ahead of Diamond Drilling

Godolphin Resources (ASX: GRL) has completed a 218-hole, 2,065-metre shallow aircore drill program at its Yeoval-Goodrich Copper/Gold Project in New South Wales, marking a significant step forward in the company's effort to map what geologists increasingly believe could be a large-scale, previously unrecognised porphyry copper-gold system. The Godolphin Resources Yeoval-Goodrich copper gold drilling results and diamond drilling plans have captured attention across the exploration sector, with 800 samples now dispatched to a laboratory and diamond drilling scheduled to commence in May 2026.

What Was Achieved and Why It Matters

The announcement detailed how the aircore program targeted two historical mining areas — the Goodrich prospect and the Mt Rose prospect — located approximately 2 kilometres apart near the township of Yeoval in the Lachlan Fold Belt, NSW. The drill program was designed as a reconnaissance exercise to map bedrock geology, alteration patterns, and geochemistry beneath shallow alluvial cover, with the specific aim of identifying drill targets for deeper follow-up work.

Programme Summary at a Glance

According to the announcement, the programme was completed efficiently and under the terms of the earn-in agreement with Canada's Great Plains Metals Corporation, meaning exploration expenditure at Yeoval-Goodrich is being funded through the earn-in structure — an important capital management consideration for Godolphin shareholders.

Geology Tells a Compelling Story

While assay results are still pending, the geological observations from rock chips recovered during drilling have provided meaningful and encouraging information about the system architecture, the company reported.

At Goodrich:

• Host rocks are reported to transition from magnetite and hornblende-altered granodiorite in the west to a more potassic and quartz-rich granite in the east, proximal to the historical mine site
• Strong magnetite alteration reportedly persists across most holes drilled
• Variable chlorite and albite alteration, including cross-cutting chlorite veins, was observed near the old mine workings
• Felsic trachyte dykes and mafic dolerite intrusions were intersected throughout

At Mt Rose:

• Drilling intersected coarse-grained granodiorite hosting variable magnetite alteration and silicification
• A distinct secondary alteration zone of chlorite and albite was identified
• Transported cover is reportedly minimal — often just ~1 metre — allowing direct sampling of basement geology
• During a preceding field visit, unidirectional solidification textures (USTs) were identified in the waste dumps, a texture associated with porphyry-style mineralisation

Furthermore, these observations have reinforced the interpretation that both Goodrich and Mt Rose represent focal points within a single, widespread hydrothermal system — a hallmark characteristic of large porphyry copper-gold deposits.

"The completion of the aircore drilling programme at Yeoval-Goodrich has materially improved our understanding of the geological framework surrounding the historical mine workings. The alteration assemblages and intrusive relationships observed provide encouraging vectors for the forthcoming diamond drilling programme," said Managing Director Jeneta Owens.

Understanding Porphyry Copper-Gold Systems — And Why Do They Matter?

What Is a Porphyry Copper-Gold System?

Porphyry deposits are among the world's most important sources of copper and gold. They form when magmatic fluids rich in metals percolate outward from cooling igneous intrusions (porphyries), depositing copper, gold, and molybdenum across large volumes of altered rock. They are typically large, low-to-moderate grade deposits that are economically significant precisely because of their scale.

Why Does This Matter at Yeoval-Goodrich?

The Lachlan Fold Belt hosts two of Australia's most significant porphyry deposits — Cadia and Northparkes — both with geological chemistry (shoshonitic) comparable to the Yeoval Intrusive Complex where Godolphin is exploring. In addition, the announcement notes that the Yeoval complex shares a similar mantle source and mineral potential to these well-known, world-class deposits.

Glossary of Key Terms

The Earn-In Structure: Smart Capital Management

One of the notable features of Godolphin's approach at Yeoval-Goodrich is how the project is being funded. Under the earn-in and joint venture agreement with Great Plains Metals Corporation (TSX-V listed), all exploration costs at the project are being funded by Great Plains — not Godolphin directly.

How the earn-in structure works:

1. Great Plains can earn a 51% interest by spending $1.0 million in exploration expenditure within 12 months of execution
2. Great Plains can then increase its interest to 70% by funding a further $1.0 million over an additional 12-month period
3. Godolphin remains operator during the initial earn-in period
4. Godolphin retains meaningful exposure to exploration success while directing its own capital toward more advanced assets

Consequently, this structure allows Godolphin to maintain active exploration progress at Yeoval-Goodrich without bearing the full cost burden, freeing capital for the company's two more advanced projects — the Lewis Ponds Gold, Silver and Base Metals Project and the Narraburra Rare Earths Project.

"This work is being conducted under the Yeoval – Goodrich earn-in agreement with Great Plains, which allows us to advance the project while maintaining focus and deploying capital towards our more advanced assets which include the Lewis Ponds Gold, Silver and base metals and Narraburra Rare Earths projects, while retaining meaningful exposure to the upside," noted Managing Director Jeneta Owens.

What Comes Next: Diamond Drilling and Assay Results

The completion of the aircore programme is not the end of the story — it is, however, the beginning of the next chapter. Two near-term catalysts are approaching rapidly.

Near-Term Milestones

Diamond Drilling Programme Details:

• Initial programme of up to 2,000 metres across three holes
• Two holes positioned adjacent to the former open pit at Goodrich
• One hole sited next to the historic shaft at Mt Rose
• Designed to test extensions to the mineralised system at depth, below and surrounding the historical workings
• A local contractor has already been engaged

The combination of aircore-derived geological vectors and the forthcoming geochemical data from the 800 samples will be used to refine diamond drill targeting — meaning the programme is both evidence-based and strategically sequenced.

The Broader Investment Case

Godolphin is operating across a portfolio of exploration assets in the Lachlan Fold Belt, one of Australia's most historically productive mineral provinces. The company holds 3,038 km² of tenement ground prospective for gold, silver, base metals, and rare earths.

Godolphin's Project Portfolio

The Yeoval-Goodrich project adds copper-gold porphyry exposure to what is already a diversified and strategically located portfolio. Furthermore, the earn-in structure means this exposure is essentially being tested and de-risked with partner funding, while Godolphin retains the operational oversight and upside participation.

The geological setting — the Yeoval Intrusive Complex — shares chemical characteristics with the host geology at both Cadia and Northparkes, which are among Australia's most productive copper-gold mines. While Yeoval-Goodrich is at an early stage and no resource has been defined, the geological analogy provides important context for why a discovery here would be significant.

Why Investors Should Watch This Space

Several factors make the coming weeks a potentially important window for Godolphin shareholders and prospective investors:

• Assay results from 800 samples are expected by the end of May 2026 — the first geochemical data from this programme and a potential near-term re-rating catalyst
• Diamond drilling is commencing simultaneously, meaning deeper testing of the system will begin before the surface data is even fully interpreted
• Geological observations already support the case for a large hydrothermal system connecting both Goodrich and Mt Rose, with UST textures at Mt Rose pointing to a potential porphyry source
• The earn-in structure preserves Godolphin's balance sheet while advancing the project — a disciplined capital allocation approach
• The Lachlan Fold Belt address provides credible geological context, with world-class porphyry precedents in the same province

The company's announcement emphasises that further updates will be provided following the assay results towards the end of May. With diamond drilling scheduled to commence in May 2026 and 800 samples now at the laboratory, Godolphin Resources Yeoval-Goodrich copper gold drilling results and diamond drilling plans have positioned the company for a series of near-term catalysts that could provide important validation of the porphyry copper-gold hypothesis.

For investors in the copper-gold exploration space, the combination of partner-funded exploration, geological observations supporting a large hydrothermal system, and imminent assay results from 218 holes of systematic drilling represents a compelling near-term opportunity to track closely.

Want to Know More About Godolphin Resources' Copper-Gold Discovery Potential?

With 800 samples at the laboratory, diamond drilling set to commence in May 2026, and a geological setting comparable to some of Australia's most productive copper-gold mines, Godolphin Resources (ASX: GRL) is approaching a series of potentially significant near-term catalysts. To learn more about the company, its projects, and the investment case behind the Yeoval-Goodrich Copper/Gold Project, watch this video overview here.