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Castle Minerals
Investor Insight
Castle Minerals is a compelling investment opportunity, underlined by its 100 percent ownership of two high-potential gold projects, a seasoned management team with a track record of success, and a strategic location near multi-million-ounce gold deposits.
Overview
Castle Minerals (ASX:CDT) is an Australia-based exploration company dedicated to advancing high-value gold projects in Ghana, West Africa. The company holds a 100 percent interest in a highly strategic 2,686 sq. km land package within Ghana’s Upper West region, a significantly under-explored yet highly prospective geological setting within the West African gold belt.
Castle Minerals’ core mission is to identify, explore and develop economically viable gold deposits, leveraging the region’s rich mineralization and proven mining history. The company's management team brings extensive experience and a strong track record of successful discoveries, ensuring that exploration efforts are guided by industry-leading expertise and strategic execution.
Castle’s portfolio is centered around its flagship Kpali and Kandia gold projects, both of which exhibit strong potential for resource expansion and economic development. These projects are situated within prolific gold-bearing structures and have demonstrated high-grade mineralization through extensive exploration efforts. With a focus on systematic exploration, the company aims to delineate and expand resources while positioning itself as a leading player in Ghana’s growing gold industry. Castle’s commitment to sustainable exploration practices and strong community engagement further enhances its ability to operate effectively in the region.
Company Highlights
- 100 percent ownership of a 2,686 sq km strategic landholding in Ghana’s highly prospective Upper West region.
- Flagship Kpali and Kandia gold projects with high-grade gold mineralization and significant resource expansion potential.
- Strong management team with a proven track record in West African gold discoveries and project development.
- Proximity to the multi-million-ounce Black Volta gold project, enhancing economic potential and development synergies.
- Robust exploration pipeline with systematic drilling programs aimed at resource expansion and near-term development.
- Commitment to sustainable and responsible exploration practices, with strong community and government engagement.
- Positioned to capitalize on the growing global demand for gold through disciplined exploration and strategic partnerships.
Key Projects
Kpali Gold Project
The Kpali gold project, a cornerstone of Castle Minerals' exploration efforts, is strategically located approximately 30 kilometers west of the regional town of Sawla in Ghana's Upper West region. Encompassing the Kpali and Bundi prospects, along with several satellite discoveries, the project area lies within the 170 sq km Degbiwu prospecting license (PL 10/26), which is encircled by the 1,033 sq km Gbiniyiri retention license (RL 8/27). Notably, the western boundaries of these licenses are delineated by the Black Volta River, marking the border with Burkina Faso.
Geologically, Kpali is situated at the convergence of two significant greenstone belts — the Bole-Bolgatanga and Wa-Lawra/Boromo belts — and three regional-scale structures. This unique positioning is associated with several major Birimian-hosted gold deposits in the region, enhancing the project's potential for substantial gold mineralization.
Recent exploration activities have yielded promising results. In February 2025, an eight-hole reverse circulation (RC) drilling program intersected shallow, high-grade mineralization in all holes. Notable intercepts include 12 meters at 8.29 grams per ton (g/t) gold from 25 meters, including 6 meters at 11.60 g/t gold from 31 meters, with a peak 1-meter intercept of 20.43 g/t gold at 36 meters. These findings have significantly upgraded the status of the Kpali gold prospect, suggesting the presence of multiple sub-parallel lodes with high-grade gold mineralization.
The broader district encompassing Kpali contains several other high-conviction prospects, reinforcing its potential as an emerging new exploration frontier. Castle Minerals plans to undertake further drilling programs, including step-out drilling, to delineate the extent of mineralization and assess the project's viability for future development.
In summary, the Kpali Gold Project's strategic location, favorable geology, and recent high-grade drilling results position it as a significant asset within Castle Minerals' portfolio, with the potential to evolve into a major gold production site in Ghana.
Kandia Gold Project
The Kandia gold project is situated in Ghana's Upper West Region. Discovered in 2010 during reconnaissance field mapping, the project encompasses a 16-kilometer-long corridor along a significant granite-sediment contact within Birimian greenstone terrain. This geological setting is known for hosting substantial gold mineralization, with the Kandia prospect itself identified through previously unknown artisanal workings spread over approximately 600 meters of strike.
Initial exploration efforts included extensive soil sampling, airborne geophysical surveys and RC drilling, totaling 264 holes over 19,541 meters. These activities led to the identification of two primary mineralized zones: the "4,000 Zone" and the "8,000 Zone."
Strategically, the Kandia project benefits from its proximity to major gold deposits. The 5.1-million-ounce Namdini gold project lies to the northeast on the same Bole-Bolgatanga greenstone belt, while the 2.8-million-ounce Black Volta gold project's Julie deposit is immediately along strike from the Kandia mineralized trend. This favorable location enhances Kandia's economic attractiveness and potential for development synergies.
Future exploration plans for Kandia involve extensional drilling at the "4,000 Zone" and targeted drilling in other areas with historically wide-spaced shallow drilling, such as the "8,000 Zone," where artisanal mining activities are also present. The primary objective is to delineate multiple near-surface, open-pitable deposits along the 16-kilometer prospective contact, advancing the project toward potential development.
Management Team
Stephen Stone - Executive Chairman
Stephen Stone has more than 30 years of experience in mining and exploration. As the former managing director of Azumah Resources, he led the discovery of a 2.5 Moz gold resource and 1.2 Moz ore reserve at the Wa gold project His expertise in West African gold exploration and project development is instrumental in guiding Castle’s strategic direction.
Matthew Horgan - Non-executive Director
Matthew Horgan brings a strong background in engineering, business development, and investor relations. His experience in strategic corporate growth and resource sector financing supports Castle’s development initiatives.
James Guy - Non-executive Director
James Guy is a geologist with extensive expertise in mining and exploration, specializing in gold and base metals projects across Africa and Australia. He has held senior executive positions with several ASX listed junior resources companies and with banking group, NR Rothschild & Sons. He is currently principal of James Guy & Associates
David Renner - Non-executive Director
David Renner has a strong track record in operations and corporate strategy for resource development. He is a key contributor to advancing the Kambale graphite project.
Hector Nyinaku, Non-executive Director
Hecto Nyinaku focuses on administration, finance and logistics within the mining industry. His strong networks in Ghana’s resource sector provide valuable operational support.
George Asomoah Boadu - Manager of Geology
George Asomoah Boadu has extensive field experience in Ghana’s gold and graphite exploration projects. His expertise is integral to defining Castle’s resource base and implementing effective exploration strategies.
Advancing strategic gold exploration assets in Ghana’s prolific Upper West region
NextSource Materials
Investor Insight
NextSource Materials is an emerging leader in the global battery materials sector, backed by a world-class graphite resource and proven technology to produce high-performance anode material. With a focus on full vertical integration, the company is strategically positioned to supply critical materials essential to the global clean energy transition.
Overview
NextSource Materials (TSX:NEXT,OTCQB:NSRCF) is a Canadian-based battery materials development company focused on becoming a vertically integrated global supplier of critical minerals essential to the global clean energy transition. The company’s strategy spans the full value chain – from mining and upgrading high-quality flake graphite to producing advanced battery anode materials – positioning it as a key supplier to the rapidly growing electric vehicle (EV) and renewable energy storage markets.
NextSource’s core asset is the Molo graphite mine in Madagascar, one of the largest and highest-grade flake graphite deposits in the world. Commencing production in October 2024, the Molo mine has a resource base of more than 153 million tonnes and the exclusive source of NextSource’s trademarked SuperFlake® graphite.
Complementing the Molo graphite mine is the company’s downstream expansion through battery anode facilities (BAFs), which will convert its proprietary SuperFlake® graphite into spherical purified graphite (SPG) and coated SPG (CSPG), enabling direct supply to global battery and automotive manufacturers outside traditional Asian supply chains.
Global demand for flake graphite, valued at US$3.12 billion in 2024, is forecast to grow to US$5.48 billion by 2034, driven by a 6.1 percent CAGR. This growth is primarily fueled by the expansion of lithium-ion battery manufacturing for EVs and renewable energy systems, where graphite remains the dominant material used in battery anodes.
NextSource also owns the Green Giant vanadium project, an advanced-stage and strategically significant vanadium asset located near the Molo mine. With a large, sediment-hosted deposit suited for vanadium redox flow batteries (VRFBs), Green Giant provides additional exposure to the grid-scale energy storage market – a rapidly emerging segment of the clean energy landscape.
NextSource has assembled an impressive leadership team with a proven track record in mine operations and building shareholder value. With long-term offtake agreements in place, a scalable mine-to-anode business model, and strategic backing from Vision Blue Resources, led by former Xstrata CEO Sir Mick Davis, NextSource is positioned to deliver significant value as a secure and sustainable supplier of critical battery materials.
Company Highlights
- Molo Graphite Project: The Molo graphite project in Madagascar is among the world’s largest and highest-quality graphite resources and is the exclusive source of SuperFlake® graphite.
- First Commercial Shipments Completed: SuperFlake® shipments have been to multiple end-users and approved for high-demand applications for flake graphite, including battery anodes, refractory and graphite foils for fire retardants and consumer electronics.
- Long-term Offtake Agreements: One of the few graphite producers globally to secure long-term sales agreements with tier one partners, including a 20,000 tpa agreement with a leading Japanese trader that supplies intermediate anode material to the Japanese market, and a 35,000 tpa agreement with thyssenkrupp Materials Trading GmbH for SuperFlake® graphite concentrate.
- Mine Expansion Planned: With anticipated volume demands expected to quickly outgrow its Phase 1 volume capacity, NextSource updated its operational strategy to utilize Phase 1 for campaign production to focus on development of its Phase 2 mine expansion.
- Downstream Value-add Expansion: The company is executing a phased rollout of battery anode facilities to produce spherical purified graphite and coated SPG at commercial scale. These facilities will supply high-performance anode material directly to battery and automotive manufacturers outside traditional Asian supply chains.
- Strategic Shareholder Support: Vision Blue Resources, a battery materials investment fund led by former Xstrata CEO Sir Mick Davis, is NextSource’s corner-stone shareholder. Sir Mick Davis also serves as NextSource’s chairman, bringing decades of mine development and operational leadership to the company.
- Vanadium Exposure: NextSource also holds the Green Giant vanadium project in Madagascar, an advanced-stage NI 43-101 resource and one of the world’s largest known sedimentary vanadium (V2O5) deposits.
Key Projects
Molo Graphite Mine and Project
NextSource’s flagship Molo graphite project ranks as one of the largest-known and highest-quality flake graphite deposits in the world. The property spans more than 62.5 hectares, sits in the Tulear region of Southwestern Madagascar, and is located 11.5 kilometers east of the town of Fotadrevo. Phase 1 of the mine is currently in operation.
NextSource has superior flake size distribution and well above the global average. The Molo asset is relatively unique for having almost 50 percent premium-priced large and jumbo flake graphite and can achieve up to 97 percent carbon purity with simple flotation alone. Molo SuperFlake® has been verified by end-users and meets or exceeds all criteria for the top demand markets for flake graphite; anode material for lithium-ion batteries, refractories, graphite foils and graphene inks.
Project Highlights
Geological and Resource Overview:
- Measured and indicated resources: 100.37 million tonnes (Mt) at 6.3 percent total graphitic carbon (C), based on a 2 percent C cut-off.
- Proven and probable reserves: 53.75 Mt at 6.2 percent C, based on a 3 percent C cut-off, including 21.33 Mt proven and 32.41 Mt probable.
- Over 300 km of continuous surface graphite mineralization has been delineated, enabling flexible, demand-driven production scale-up.
- The resource base supports more than 100 years of mine life at 17,000 tpa and 25+ years at 150,000 tpa production levels.
Operational Status:
- Phase 1 operations commenced production in October 2024, with the first commercial shipments of SuperFlake® graphite concentrate delivered to customers in Germany and the US in early 2025.
- In May 2025, NextSource transitioned Phase 1 to campaign production in order to preserve capital and prioritize the larger Phase 2 expansion, which is now the operational focus.
- Nameplate capacity for Phase 1 is 17,000 tpa, with modular Phase 2 plans targeting up to 150,000 tpa production capacity.
Strategic Sales Agreements:
- A 35,000 tpa SuperFlake® graphite offtake agreement with thyssenkrupp Materials Trading GmbH.
- A 20,000 tpa agreement with a leading Japanese trader that supplies anode material to major OEM supply chains (Tesla, Toyota).
Battery Anode Facilities
NextSource’s BAFs are value-added processing plants designed to convert smaller flake graphite into high-performance anode material, an essential component of lithium-ion batteries used in electric vehicles.
Project Highlights
Technology and Product Focus:
- Using a proprietary and proven processing technology, licensed exclusively by NextSource and currently supplying major OEMs, the BAFs will produce spherical purified graphite (SPG) and coated SPG (CSPG) through a process verified within, and currently being used by, the Tesla and Toyota supply chains.
- The CSPG production process involves micronizing flake graphite, shaping it into spheres (spheroidization), purifying it and applying a hard carbon coating to enhance durability and performance in battery applications.
Pilot to Commercial Progression:
- A pilot BAF in Mauritius successfully validated NextSource’s processing technology and facilitated advanced product qualification with Tier 1 EV and battery manufacturers.
- In 2025, the company redirected its BAF expansion focus from Mauritius to the Middle East, identifying Saudi Arabia and the UAE as ideal first locations due to favorable permitting, infrastructure, and access to global EV markets.
Strategic Plans and Economic Advantages:
- NextSource’s established technical process gives it a competitive advantage by significantly reducing the time and cost required for R&D and qualification phases.
- The modular BAF rollout strategy supports flexible scaling, with additional facilities planned for North America, Europe, and Asia to meet growing OEM demand.
- Feedstock will be sourced primarily from the Molo Mine, with provisions for qualified third-party graphite as needed.
Green Giant Vanadium Project
The Green Giant vanadium project is a 100-percent-owned, advanced-stage exploration asset located in south-central Madagascar, approximately 15 kilometers from the Molo Graphite Mine. It is one of the world’s largest known vanadium deposits and a potential future growth driver for NextSource.
Project Highlights
Resource Profile:
- NI 43-101 compliant resource of approximately 60 million tonnes, grading an average of 0.7 percent vanadium pentoxide at a 0.5 percent cut-off.
- The deposit is sediment-hosted, a rare geological profile seen in only about 5% of vanadium occurrences, and favorable for producing high-purity vanadium compounds.
Strategic Importance:
- Vanadium is a key material in vanadium redox flow batteries (VRFBs), which are emerging as a critical solution for long-duration grid-scale energy storage—a necessary component of the transition to renewable power.
- With increasing global focus on decarbonizing power systems, Green Giant provides long-term optionality in a growing adjacent market.
Development Status:
- Over US$20 million has been invested in exploration and development since acquisition in 2007.
- While currently on hold to maintain focus on graphite and anode material commercialization, the project remains a strategic asset for future energy storage market expansion.
Management Team
Hanré Rossouw - President and Chief Executive Officer, Director
Hanré Rossouw joins NextSource from his role as executive director and chief financial officer of Sasol Limited with extensive experience in the global natural resources industry over the last 25 years. A British and South African national, Rossouw has held senior positions in leading global mining and investment companies where his roles involved business development, M&A, capital markets, asset management and growth optimization.
Craig Scherba - Chief Development Officer, Director
Craig Scherba brings extensive operational and geologic experience, having discovered both the Molo and Green Giant deposits. He currently heads up development of NextSource’s downstream OEM offtake strategy and plans.
Jaco Crouse - Chief Financial Officer
Jaco Crouse brings over 20 years of experience in the global natural resources sector, with expertise in M&A, capital markets and financial strategy. He held senior positions at Glencore and Xstrata.
Brent Nykoliation - EVP, Strategy and Corporate Affairs
Brent Nykoliation joined the senior management team at NextSource Materials as vice-president in 2007 and leads strategy and corporate affairs for the company. In addition, he oversees all communications with graphite customers, institutional investors and analysts for the company.
He brings over 20 years of senior management experience, having held marketing and strategic development positions with several Fortune 500 corporations in Canada.
Dr. Tilo Hauke - EVP, Downstream Operations
Dr. Tilo Hauke leads the development of the company’s BAFs, focused on producing commercial-scale graphite anode material for lithium-ion batteries used in electric vehicles. He previously spent two decades at SGL Carbon SE, a global leader in carbon and graphite products, holding senior roles including SVP of Fuel Cell Components and Group VP of Technology and Innovation.
Danniel Stokes - VP, Special Projects
Daniel Stokes spearheads the project management aspects of the company, with significant experience across a diverse portfolio of projects in mining, infrastructure and nuclear industries.
Markus Reichardt - VP, Sustainability
Markus Reichardt is responsible for driving the company’s safety, health, environment, social, climate change and quality performance and initiatives. He has a 25-year track record in operational, senior corporate and advisory roles in the resources, agricultural and renewables sectors across the developing world.
Jean Luc Marquetoux - Country Manager
Jean Luc Marquetoux brings nearly three decades of experience in mining and project development in Madagascar and brings deep regional and governmental expertise in Madagascar.
Board of Directors
Sir Mick Davis - Chairman
Sir Mick Davis is the CEO of Vision Blue Resources and a highly successful mining executive accredited with building Xstrata plc into one of the largest mining companies in the world before its acquisition by Glencore plc.
Ian Pearce – Director
Ian Pearce is the former CEO of Xstrata Nickel, and was the former COO of Falconbridge Limited, which was acquired by Xstrata Plc in 2006. Xstrata Plc’s acquisition of Falconbridge was one of the largest mining takeovers globally and one of the largest takeover bids in Canadian history.
Brett Whalen — Director
Brett Whalen has over 20 years of investment banking and M&A expertise, spending over 16 of those years at Dundee Corporation. During his tenure at Dundee, Whalen was directly involved in completing approximately $2 billion in M&A deals and helped raise over $10 billion in capital for resource sector companies.
Christopher Kruba - Director
Christopher Kruba is vice-president and legal counsel to Nostrum Capital Corporation and several related corporations that are part of the Toldo Group.
Martina Buchhauser - Director
Martina Buchhauser is a globally recognized leader in the automotive industry, with deep expertise in sustainable mobility and the transition to low-carbon, responsible business practices. Her executive career includes senior roles in global procurement and supply chain management at General Motors, MAN, BMW, and most recently Volvo Cars.
Castle Minerals Investor Kit
- Corporate info
- Insights
- Growth strategies
- Upcoming projects