Godolphin Resources Advances Copper-Gold JV Drilling at Yeoval and Goodrich

Godolphin Resources Locks in JV Milestone as Copper-Gold Drilling Advances at Yeoval and Goodrich

The Godolphin Resources Yeoval and Goodrich copper gold JV drilling update confirms that Great Plains Metals Corporation (TSXV: GPS) has met the initial earn-in milestone at the Yeoval and Goodrich copper-gold tenements in New South Wales and has moved to the next stage of the joint venture (JV).

According to the ASX announcement dated 16 June 2026, Great Plains has:

• Funded $1 million in exploration to secure a 51% interest in the Yeoval and Goodrich projects.
• Formally elected to progress to the second earn-in phase, targeting a 70% participating interest.
• Committed to a further $1 million in exploration expenditure within the next 12 months to earn an additional 19% interest.

Godolphin Resources Ltd currently retains a 49% interest and exposure to any exploration success at Yeoval and Goodrich. Great Plains has also requested that Godolphin Resources Ltd remains as operator for the remaining earn-in period, maintaining Godolphin's technical leadership over the programme.

Assay results from the current drilling are anticipated by early-to-mid July 2026, providing a defined near-term information point for investors.

"Great Plains completing the initial earn-in requirements and electing to proceed to the 70% earn-in validates the exploration potential we see at Yeoval and Goodrich, and their request for us to remain as operator reflects the strength of our working relationship. Our technical team will continue to lead the programme as we await assay results from the current drill campaign.

Yeoval and Goodrich represent meaningful upside for our shareholders as Great Plains advances the exploration programme, and we look forward to reporting assay results in the coming weeks alongside continued progress at Lewis Ponds," said Jeneta Owens, Managing Director, Godolphin Resources Ltd.

JV Earn-In Structure: Practical Implications for Godolphin Resources Ltd

The Yeoval and Goodrich JV is based on an earn-in model in which Great Plains can increase its ownership by funding exploration on the tenements, while Godolphin Resources Ltd retains an interest and remains operator.

According to the ASX announcement, the structure is as follows:

Key practical points for investors:

• Great Plains has already met the Phase 1 requirement and now holds 51% of the project.
• To move to 70%, Great Plains must spend a further $1 million on exploration within the agreed 12‑month period.
• Godolphin Resources Ltd retains project exposure during this process and may hold a 30% interest if Phase 2 is completed as outlined.

A notable element in the announcement is Great Plains' request that Godolphin Resources Ltd remain as operator during the next earn-in period. This indicates that:

• Godolphin's technical team continues to design and manage the drilling and exploration work.
• Operational control and day-to-day decision-making remain with Godolphin Resources Ltd while the JV partner funds the agreed exploration expenditure.

For shareholders, this model combines:

• Funded exploration at Yeoval and Goodrich.
• Retained equity exposure to any copper-gold discovery.
• Ongoing technical leadership by Godolphin Resources Ltd across the ~290 km² project area located 70 km northwest of Orange, NSW.

Drilling Update: Advancing Porphyry Copper-Gold Targets

In the ASX announcement, Godolphin Resources Ltd confirmed that drilling has been progressing during the initial earn-in period.

Current programme status:

• Three diamond drill holes completed at the Goodrich prospect.
• One diamond drill hole in progress at the Mt Rose prospect.
• Drilling is targeting a large-tonnage porphyry copper-gold system.
• Assays from completed holes are anticipated by early-to-mid July 2026.

The drill programme is designed to test the potential for a sizeable porphyry-style copper and gold system within the Yeoval and Goodrich tenements.

A diamond drill rig is currently on site at Mt Rose, as illustrated in Figure 1 of the ASX announcement, reflecting an active exploration programme managed by Godolphin Resources Ltd and funded under the JV by Great Plains.

Educational Section: Understanding Porphyry Copper-Gold Systems

What Is a Porphyry Copper-Gold System?

A porphyry copper-gold system is a type of mineral deposit formed when metal-rich fluids move through fractured rock around a large body of intrusive magma at depth.

Key features:

• Large areas of rock affected, often over several kilometres.
• Copper, gold and sometimes molybdenum are spread through the rock in many small veins and fractures.
• Grades are often lower than in narrow, high-grade veins, but the tonnage can be very high.

In simpler terms, instead of metal being concentrated in a few very rich veins, a porphyry system typically contains lower metal grades distributed across a large volume of rock. This style of deposit is important globally because the overall contained metal can still be very large.

Why Do Porphyry Systems Matter to Investors?

From an investment perspective, porphyry copper-gold systems matter for several reasons:

• Many of the world's largest copper operations are porphyry deposits.
• They are often long-life mines when proven economic, due to the large tonnage.
• Even moderate grades can be important when processed at scale.

For a company such as Godolphin Resources Ltd, demonstrating that Yeoval and Goodrich host a porphyry system with persistent copper and gold mineralisation could, if later supported by detailed studies, be a value driver. At the current stage, the ASX announcement indicates that drilling is aimed at testing this geological concept, with assay data still pending.

Key Exploration Terms Explained

To assist non-specialist readers, some of the technical terms used in the ASX announcement are explained below.

Drilling at Yeoval and Goodrich is focused on testing whether copper and gold mineralisation is present in the types of rock and structural settings commonly associated with porphyry systems.

Project Location and Regional Geological Context

The ASX announcement states that the Yeoval and Goodrich tenements cover approximately 290 km² and are located around 70 km northwest of Orange, NSW.

These tenements sit within the Lachlan Fold Belt, which, according to Godolphin Resources Ltd, is a world-class gold-copper and rare earth element province. This belt hosts multiple known deposits and operating mines, and is an established focus area for both Australian and international explorers.

Positioning of Yeoval and Goodrich within this geological province provides:

• Regional support for the exploration model being tested.
• Access to established exploration and mining infrastructure in central New South Wales.

The regional context does not in itself guarantee economic mineralisation. However, it helps explain why Great Plains and Godolphin Resources Ltd have committed capital and technical resources to the JV.

Near-Term Catalysts: Assay Timeline and Phase 2 Earn-In

According to the ASX announcement, several near-term activities and milestones are relevant for investors monitoring Godolphin Resources Ltd.

Key upcoming events:

1. Assay results from current drilling

• Assays from the three completed diamond drill holes at Goodrich are anticipated by early-to-mid July 2026.
• These will provide the first laboratory-confirmed data on copper and gold grades from the current programme.
• Results from the Mt Rose hole in progress are likely to follow, once completed and submitted for analysis.

2. Execution of the Phase 2 earn-in

• Great Plains has already elected to move to Phase 2, targeting a 70% interest.
• This requires an additional $1 million in exploration expenditure over approximately the next 12 months.
• The pace and scope of work programmes during this period will shape the rate at which the JV advances.

3. Ongoing work at Lewis Ponds

• In the ASX announcement, Managing Director Jeneta Owens referred to "continued progress at Lewis Ponds" alongside the Yeoval and Goodrich update.
• Lewis Ponds is described by Godolphin Resources Ltd as the company's advanced Lewis Ponds Gold and Silver Project.
• This highlights that the Yeoval and Goodrich JV forms part of a broader project portfolio.

A summary of the announced timeline is set out below.

The assay results in particular will be an important technical reference point, as they will either support or challenge the current geological model being tested.

Investment Context: Funded Exploration With Retained Exposure

The JV structure highlighted in the ASX announcement has several features that are relevant to investors evaluating Godolphin Resources Ltd.

1. Funded exploration at Yeoval and Goodrich

• Great Plains is responsible for $2 million in total earn-in expenditure to reach a 70% interest.
• This reduces the direct capital burden on Godolphin Resources Ltd for this specific copper-gold programme.
• Godolphin still retains exposure to any potential discovery through its current 49% interest, which may become 30% if Great Plains completes the second earn-in phase.

2. Operator status retained by Godolphin Resources Ltd

• Great Plains has requested that Godolphin remains the operator for the additional 12‑month earn-in period.
• This keeps Godolphin's technical team in charge of programme design, drilling execution and data interpretation.
• For investors, furthermore, this indicates continuity in how the project is managed and explored.

3. Portfolio positioning and commodity exposure

The ASX announcement and the "About Godolphin Resources" section set out the broader project portfolio of Godolphin Resources Ltd, which includes:

• Lewis Ponds Gold and Silver Project (advanced).
• Narraburra REE Project (rare earth elements).
• Yeoval Cu-Au and Mt Aubrey Au Projects (copper-gold and gold).
• Tenements totalling approximately 3,038 km² across the Lachlan Fold Belt.

This spread provides exposure across several commodities:

• Gold and silver through Lewis Ponds and Mt Aubrey.
• Copper and gold through Yeoval and Goodrich under the JV.
• Rare earth elements through Narraburra.

For investors, this breadth means that the JV at Yeoval and Goodrich is one part of a wider asset base managed by Godolphin Resources Ltd, rather than a single-asset exposure.

Why Investors May Monitor Godolphin Resources Ltd at This Stage

Based on the ASX announcement, several factual elements frame the current position of Godolphin Resources Ltd:

• A JV partner, Great Plains, has already funded $1 million and elected to spend a further $1 million to increase its interest in the Yeoval and Goodrich copper-gold projects.
• Godolphin Resources Ltd retains a 49% interest following the initial earn-in and has been asked to continue as operator during the next 12‑month period.
• Active drilling is under way, testing a large-tonnage porphyry copper-gold target across a ~290 km² tenement package in the Lachlan Fold Belt.
• Laboratory assays from the current drilling are expected by early-to-mid July 2026, providing near-term technical data.
• The company also continues to advance its Lewis Ponds Gold and Silver Project, along with other exploration assets in New South Wales.

"Godolphin Resources Ltd has confirmed that Great Plains has met the initial earn-in milestone at Yeoval and Goodrich and has committed to a further $1 million in exploration to target a 70% interest. With Godolphin Resources Ltd remaining as operator and diamond drilling in progress on porphyry copper-gold targets, upcoming assay results expected in early-to-mid July 2026 represent the next major technical information point for investors assessing the company's copper-gold exposure in the Lachlan Fold Belt."

Want to Learn More About Godolphin Resources and Its Copper-Gold JV Progress?

With Great Plains already having funded $1 million to secure a 51% interest in the Yeoval and Goodrich projects and committing a further $1 million to advance towards 70%, Godolphin Resources Ltd retains meaningful equity exposure and operational control across a ~290 km² porphyry copper-gold target in the Lachlan Fold Belt — with assay results expected as early as July 2026. To find out more about Godolphin Resources Ltd, its JV structure at Yeoval and Goodrich, and the broader project portfolio including the advanced Lewis Ponds Gold and Silver Project, click here.