Challenger Gold’s Hualilan PFS Shows 1.84Moz AuEq and US$232M Capex

Robust Financials Anchor Hualilan Development

Challenger Gold Limited (ASX:CEL) has unveiled a comprehensive Pre-Feasibility Study (PFS) for its fully permitted Hualilan Gold Project in San Juan, Argentina, confirming a large-scale, low-risk development opportunity. The PFS delivers a pre-tax net present value (NPV) at a 5% discount rate of US$1.45 billion and a post-tax NPV of US$1.10 billion based on a 14.25-year mine life producing approximately 1.84 million ounces gold equivalent (AuEq). The project’s pre-tax internal rate of return (IRR) is a compelling 45%, supported by a rapid payback period of just 2.25 years from production start.

Life of mine (LOM) production is forecast at 1,673,000 ounces of gold, supplemented by 6.4 million ounces of silver and 74,000 tonnes of zinc, converted to a gold equivalent figure using conservative metal price and recovery assumptions. The study’s all-in sustaining cost (AISC) averages US$1,618 per ounce of payable gold, placing Hualilan competitively within the global gold cost curve.

Capital expenditure is deliberately staged to reduce upfront financial risk, with initial development focusing on an 8 Mtpa heap leach operation delivering early cash flow at a low AISC of US$1,100/oz over the first 2.5 years. The main 1.5 Mtpa flotation plant is scheduled to commence in Year 3, funded from heap leach cash flows, further smoothing capital requirements and reducing financing exposure. Total pre-production capital is estimated at US$232 million excluding contingency, a modest sum for a project of this scale.

Integrated Mining and Processing Strategy

The project’s mining plan is based on conventional truck-and-shovel open pit operations, optimised through over 360 iterations of enterprise-wide scheduling using Whittle Consulting’s Prober tool. The mine design is split into nine phases across northern, central, and southern domains, balancing early access to higher-grade ore with efficient waste management and progressive in-pit backfilling to reduce haul distances.

Ore routing is value-driven, with material assigned to one of three processing streams: heap leach for lower-grade oxide and transitional ores (Ore Type A), bulk flotation for moderate-grade sulphide ores (Ore Type B), and sequential flotation for higher-grade zinc-bearing sulphide ores (Ore Type C). This flexible approach ensures optimal recovery and economic returns across variable ore types.

Metallurgical testwork supports robust recoveries: heap leach gold recovery is conservatively modelled at 69.7%, with recent large-diameter column tests suggesting upside to 86% recovery for dacite material. Flotation recoveries are strong, with gold recoveries of 94.7% for bulk flotation and 92.2% for sequential flotation, alongside zinc recovery of 83.7% in the sequential circuit.

Capital and Operating Cost Discipline

Capital costs total US$604 million over the life of mine, including initial capital of US$267 million (with 30% contingency) and sustaining/expansion capital of US$337 million. The staged development strategy significantly reduces initial capital intensity and financing risk. Notably, a memorandum of understanding with Argentinian power company YPF Luz contemplates third-party funding of electrical infrastructure under a power purchase agreement, potentially removing approximately US$48 million of upfront capital.

Operating costs are detailed with mining costs modelled at US$2.24 per tonne moved, reflecting contractor efficiencies and detailed equipment-level cost modelling. Processing costs differ by circuit, with the flotation plant operating at US$18.27 per tonne processed and the heap leach at US$4.04 per tonne. General and administrative costs total US$184 million over the LOM, supporting a peak workforce of approximately 900 personnel.

Permitting, Social Impact and Risk Profile

Hualilan is fully permitted for production, with an approved Environmental Impact Assessment (EIA) under Resolution No. 688-MM-2024 by the San Juan Province government. The project is expected to create over 900 new jobs locally and generate substantial provincial royalties and corporate taxes, with social commitments prioritising local employment, community development, and technical training programs.

A comprehensive risk assessment identifies key risks including currency volatility, concentrate payabilities, supply chain constraints, and sovereign risk, balanced by mitigations such as diversified offtake agreements, fiscal stability incentives under Argentina’s RIGI regime, and experienced contract mining partners. Geological uncertainty is managed by limiting inferred resource use to 20% for mill feed and 30% for heap leach feed, with ongoing infill drilling planned to upgrade resources.

Funding and Leadership Momentum

Challenger’s clean ownership structure; with 100% project ownership and only US$15 million unsecured debt; provides maximum financing flexibility. The company estimates a funding requirement of approximately US$235 million to cover construction through commissioning, expected to be met via a mix of debt and equity. Early discussions with financiers and royalty providers have been positive.

In parallel, Challenger has raised A$85 million in a placement led by new Non-Executive Chairman-elect Peter Marrone, a seasoned gold executive with a track record of discovery and development success. The capital raise will accelerate resource growth drilling, fund the definitive feasibility study (DFS), and support preparatory capital for standalone development. This leadership and funding boost aligns with the company’s transition from toll milling to full-scale production.

Challenger’s recent operational progress includes the commencement of ore haulage from Hualilan to the Casposo Plant under toll milling, setting the stage for standalone operations and cash flow generation ahead of the full build-out. The company’s strategic capital raising and appointment of experienced executives signal intent to advance Hualilan swiftly toward production.

The PFS represents a significant de-risking milestone for Hualilan, confirming a financially robust, technically sound pathway to production with multiple levers for optimisation. However, the project remains subject to commodity price fluctuations, geological uncertainty inherent in inferred resources, and execution risks typical of large-scale mining developments. The upcoming DFS, scheduled for Q3 2026, will be pivotal in refining capital estimates, operational parameters, and securing project financing.

Investors will be watching how Challenger balances capital discipline with growth opportunities, including resource conversion drilling and potential processing expansions, while navigating Argentina’s macroeconomic environment and supply chain challenges. The company’s ability to secure competitive financing and execute on its staged development plan will be critical to realising Hualilan’s substantial value potential.

Meanwhile, the recent ore haulage commencement under toll milling provides operational momentum and early cash flow, complementing the capital raise and leadership changes that set a new strategic course for Challenger. The company’s careful management of inferred resource exposure and capital staging reflects a pragmatic approach to risk and value creation in a complex jurisdiction.

As Challenger moves toward its next milestones, including the DFS and shareholder approvals for its capital raising and board appointments, the market will be keen to see how these elements coalesce into a fully funded, executable development plan for one of Argentina’s most promising gold projects.