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Manuka Resources Limited (ASX: MKR) (“Manuka” or the “Company”) is pleased to release an updated Mineral Resources Estimate for Mt Boppy. The Resource update supports Manuka’s strategy to install a purpose-built gold processing plant at Mt Boppy and recommence on-site gold production from Q4 2024.
Highlights:
- The results of a recently completed Sonic Drilling Program over the Main Waste Rock Dump and Dry Tailings have successfully delivered an updated Mineral Resource Estimate for Mt Boppy.
- The updated Resource comprises 4.28Mt at 1.19g/t Au for 163koz of contained gold. Importantly, the updated Resource has seen an 100% increase in the portion of contained gold ounces classified as Indicated.
- The Mt Boppy Measured and Indicated Resource categories now comprises 82% of total Resource Estimate.
- A high-grade component of the Resource comprising 1.8Mt at 1.74g/t containing 102koz Au has been identified as a basis for future mine planning.
- The results support Manuka’s strategy to install on-site processing plant at Mt Boppy and provides confidence in the development of a mine plan that will underpin the recommencement of gold doré production.
Dennis Karp, Manuka’s Executive Chairman, commented:
“The Sonic Drilling Program was critical precursor to the recommencement of the processing of rock dumps and dry tailings at Mt Boppy. The results of this program have been extremely positive allowing us to significantly improve the confidence of our Mt Boppy Resource.
Consequently, Manuka is confident in its strategy to progress the establishment a fit-for- purpose on-site gold processing plant at Mt Boppy in the coming months and in turn free up our Wonawinta process plant, most recently used to process Mt Boppy ore, for future silver production from the existing Wonawinta Silver mine.
The bullish gold and silver markets, combined with the fact that Manuka has two granted mining licenses - both fully permitted for on-site processing - and existing processing infrastructure, translate to a very exciting time for the Company.”
Mt Boppy Resource Statement Summary
The Mineral Resource Estimate at Mt Boppy has been updated subsequent to the completion of a 26 borehole 506m sonic drilling evaluation programme over the Mt Boppy Rock Dumps and Dry Tailings completed in December 2023 (Figure 1).
Figure 1: Location Sonic drilling collars over Mt Boppy Rock Dump (left) and TSF3 PAF (right)
The updated Resource comprises 4.28Mt at 1.19g/t Au for 163koz of contained gold of which 82% is contained in the Measured and Indicated categories (Table 1). Importantly, the Resource update sees the ounces classified as Indicated increase by 100% over the previous estimate.
The Resource for Mt Boppy comprises (Table 2):
Rock dumps and tailings depositories, with gold grades derived from recent Sonic drilling to bedrock, and fire assay head grades of +90, -90+20, +10-20, and -10mm size fractions, each weighed to ascertain mass % distribution. The rock dump and tailings Resources are reported at a cutoff of 0.25g/t Au total 3.9Mt tonnes at a grade of 0.89g/t Au for 110,628oz Au.
In-situ hard rock Resources including:
- a Mt Boppy open cut pit shell that reaches a depth of 215m below surface at the southern end of the Mt Boppy deposit. Material within the current pit design is reported at a 1.6g/t Au cut off and material below the pit design is reported to a 3.0g/t Au cut off
- the Boppy South mineral zone based on a grade shell modelled at a 1.6g/t cut off. This prospect still requires final drilling and evaluation before assessing the viability of establishing a small opencast mine.
The incremental change to the overall Mt Boppy Resource relates to updates to Rock dumps and Tailings depositories. The combined Mt Boppy Open Cut and Boppy South Resource of 282kt at a grade of 4.95 g/t Au for 44,820 ounces gold remain unchanged from that previously reported (ASX Release 25 August 2023) and all material assumptions continue to apply.
Click here for the full ASX Release
This article includes content from Manuka Resources Limited, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
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Manuka Resources
Investor Insight
Manuka Resources’ unique value proposition is focused on its three fully licenced projects, which include two precious metals assets in one of Australia’s most prolific regions for base and precious metals, and a company-making iron sands (vanadium and titanium co-products) project in New Zealand’s exclusive economic zone (EEZ) off the Taranaki bight. Manuka Resources is well-placed to deliver significant shareholder value, driven by a phased strategy that includes a clear pathway to near-term precious metals production.
Strategy Overview
Manuka Resources (ASX:MKR) is focused on bringing its precious metals assets in the Cobar Basin into production, as well as progressing its New Zealand domiciled Taranaki VTM iron sands project.
The company previously revealed a phased strategy focused on delivering maximum value to its shareholders. The first phase focused on bringing back the Mt Boppy gold mine into production and it released an optimised production plan for the mine restart. At the time, the company believed silver production would follow gold but noted it was flexible in this regard. In any event and simultaneous to this, will be the ongoing development of the Taranaki vanadium titano-magnetite (VTM) project.
The Cobar Basin located in the central-west of New South Wales, is one of the richest mining provinces in Australia, home to some of Australia’s largest mining companies and explorers.
The Mt Boppy gold mine was historically one of the richest in NSW, Australia and produced ~500,000 oz gold at an average grade of 15 grams per ton (g/t) gold. Accordingly, the company is very excited about its exploration potential.
Drone image looking South showing the main components of the Rock Dump and tailing resources in relation to the Mt. Boppy open pit.
The initial five-year mine plan is largely focused on the screening and processing of gold-bearing waste material above ground on the Mt Boppy mine site. The company had been processing these wastes from June 2023 to December 2023 at its Wonawinta plant and now will look to optimize the process.
The Wonawinta silver project will be the largest primary silver producer in Australia and expected to be back in silver production within 12 months. Manuka has released a maiden ore reserve (under its ownership) of 4.8Mt1 at 53.8g/t silver containing 8.4Moz of silver comprising proven ore reserves of 0.8Mt at 50.8g/t silver; and probable ore reserves of 4.1Mt at 54.3g/t silver. Ore Reserve is based solely on shallow (<40m deep) oxide material.
The Wonawinta 100tph Ball Mill
The gold and silver market appears to be in an upward trend, with prices for both precious metals hitting their all-time highs recently, in Australian dollar terms for silver, which bodes very positively for MKR.
Company Highlights
- Manuka Resources is an ASX-listed mining company focused on producing gold and silver from its two 100 percent owned fully permitted projects (one gold and one silver) in the Cobar Basin in New South Wales, Australia.
- In addition, MKR’s wholly owned subsidiary Trans-Tasman Resources Limited (“TTR”) is the owner of the Taranaki VTM (vanadiferous titanomagnetite) iron sands project, located in the New Zealand EEZ, off the south-west coast of the north island.
- Manuka released the details of the Taranaki VTM project’s pre-feasibility study (PFS) on 26 March 2025, which highlights the extremely robust economics of the project with an NPV10 of US$1.2B and IRR 39 percent
- TTR will also be lodging its application under New Zealand’s Fast Track Approvals Act for the Taranaki VTM project imminently. (The project was included in Schedule 2 of the Act). Successful conclusion of review under the Fast Track pathway will result in final regulatory approvals (marine discharge consent) being granted, completing the full suite of consents to operate the project for 20 years.
- The Company’s primary focus for its precious metals assets is on bringing both the fully permitted Wonawinta silver project and the Mt Boppy gold mine back into production during 2025. The Wonawinta processing plant (primarily constructed for silver production in 2012 with production capacity of 850,000-1 million tpa) has been recently used for both gold and silver processing and is on active care and maintenance for rapid restart..
- The Wonawinta silver project was previously the largest primary producer of silver in Australia, and Manuka expects this to again be the case once production restarts.
- While the substantially higher gold prices have been securing headlines over the past six months, it is worth noting that the silver price is also trading at an all time high which makes restarting the project very attractive (the all time high for silver is against the Australian dollar, currently silver is around AU$54/oz silver).
- Manuka released its maiden silver reserve in October 2024 making it the only production ready silver reserve on a project based in Australia.
- Elevated gold and silver prices should materially benefit Manuka Resources, resulting in strong profitability and cash flows once its projects move into production.
Key Projects
Mt Boppy Gold Project
The Mt Boppy gold project comprises three mining leases, four gold leases and one exploration license, spanning an area of more than 210 sq km in the prolific Cobar Basin in New South Wales, Australia. The project was acquired by Manuka in 2019 and has a current mineral resource of 4.3 Mt at 1.19 g/t gold. This includes a combination of oxidized and transitional/fresh mineralization in the ground, as well as mineralized rock dumps and tailings.
Historically, Manuka Resources has processed its stockpiles and gold mineralized waste products through its Wonawinta processing plant. However, inefficiencies associated with trucking and processing ore at the distant Wonawinta plant has led the company to revise its strategy. It is now looking to construct a processing plant at Mt Boppy so that ore from the mine can be processed on-site. Mt Boppy has excellent infrastructure including a 48-person mine camp and is fully permitted for the proposed processing plant and on-site production.
The updated mineral resource comprises 4.28 Mt at 1.19 g/t gold for 163 koz of contained gold, of which 82 percent is in the measured and indicated categories.
An on-site plant will offer significant cost savings and improve the project economics.
Manuka Resources anticipates Mt Boppy to deliver total EBITDA of >AU$90 million and cash flow of >AU$80 million over a five-year mine life.
Wonawinta Silver Mine Project
The Wonawinta plant
The Wonawinta project is fully permitted with all the necessary infrastructure, including an 850,000 to 1 million tpa processing plant. The plant has been used for processing ore from Mt Boppy. The Wonawinta silver mine is currently under care and maintenance. The company is considering the possibility of resuming operations at Wonawinta, leveraging the improved silver price environment. Manuka has released a maiden ore reserve (under its ownership):
- Ore Reserve of 4.8 Mt at 53.8 g/t silver containing 8.4 Moz of silver comprising:
- Proved Ore Reserves of 0.8 Mt at 50.8 g/t silver; and
- Probable Ore Reserves of 4.1 Mt at 54.3 g/t Ag.
The maiden silver ore reserve and the preparation of an implementation plan for Wonawinta support the potential restart of silver mining and processing operations in the near
future. The company is reviewing its silver restart plans in light of the current price increases and expects to announce a decision before the end of May 2025.
Taranaki VTM Project
The Taranaki VTM project is located within New Zealand's exclusive economic zone, approximately 22 to 36 kilometres offshore, outside the 12 nautical mile boundary from the coastline. The project boasts a JORC resource of 3.2 billion tons at 10.17 percent iron oxide, 1.03 percent titanium dioxide and 0.05 percent vanadium oxide. It holds a mining license allowing initial extraction of 50 million tons annually, resulting in 5 million tons of VTM concentrate per year for 20 years (concentrate grade of 56 to 57 percent iron, 8.5 percent titanium dioxide and 0.5 percent vanadium pentoxide). At this extraction rate, the JORC resource provides approximately 60 years of potential mining inventory.
The project was included in the New Zealand government's Schedule 2 of the Fast Track Approvals Act 2024. The next step for Manuka was to complete pre-feasibility study (“PFS”) on the project. This was released to the market on 26 March 2025 and presents an extremely robust economic outlook for the project as can be seen below.
Management Team
Dennis Karp – Executive Chairman
Dennis Karp is a former commodities trader with nearly four decades of corporate experience. He started his career in 1983 and worked in HSBC until 1997 before moving to Tennant, one of Australia’s largest physical commodities trading companies with operations in Asia and Europe. He was a principal shareholder of Tennant Metals until 2010 and a managing director until December 2014. He founded ResCap in December 2014. Since then, he has participated in diverse resource projects and investment opportunities across base metals and bulk commodities. He holds a Bachelor of Commerce from the University of Cape Town.
Alan Eggers – Executive Director
Alan Eggers has over 40 years of experience in the mining sector. He is a geologist and was the founder of Summit Resources, which became an ASX top 200 company and was acquired by Paladin Energy in 2007 for AU$1.2 billion. Throughout his career, he has held director positions at numerous companies. He holds a Bachelor of Science, Honours, and Master of Science degrees from Victoria University of Wellington. He is recognized as a fellow of the Society of Economic Geologists and holds memberships in AusIMM and the Australian Institute of Geoscientists.
John Seton – Non-executive Director
John Seton is a lawyer with extensive experience in the mineral resources sector. He has served as director in several ASX and NZX listed companies. He holds a Bachelor of Laws from Victoria University, Wellington, and a Master of Law (Honours) from the University of Auckland and is a chartered fellow of the New Zealand Institute of Directors.
Haydn Lynch – Chief Operating Officer
Haydn Lynch has over 25 years of experience in M&A, capital markets and private equity. He has been involved in executing several domestic and cross-border transactions in various sectors including metals and mining, and industrials. He has held leadership roles in global investment banks, including Bankers Trust Australia, Investec Bank, RBC Capital Markets and Southern Cross Equities. He has undergraduate degrees in mechanical engineering and economics from the University of Queensland and a Master in Commerce from the University of New South Wales.
Dieter Engelhardt – Chief Metallurgist and General Manager
Dieter Engelhardt has over 30 years of experience in the mining industry including roles as senior metallurgist at Telfer Gold Mine and Northparkes Mines, resident manager at McKinnons Gold Mine, and manager of ore processing at CSA Mine. Engelhardt was employed by Newcrest Mining (now Newmont) in various roles, including as manager of ore processing and principal metallurgist.
Phil Bentley – Chief Geologist
Phil Bentley has over 40 years of experience in the mining industry across New Zealand, South Africa, and Australia, holding senior geological roles as well as senior management and director positions. He has worked as a chief geologist at Randgold Resources and Randgold & Exploration, Global Head of Exploration at Trafigura Mining Services, and Principal Geologist Africa at CSA Global South Africa. He is a Qualified person under NI 43-101 (Canada) and JORC (Australia) and is a Fellow of the South African Geological Society. He holds a Bachelor of Science (Honours) in Geology at Victoria University of Wellington. He also has a Masters of Science in Economic Geology at Victoria University of Wellington and a Master’s of Science in Mineral Exploration from Rhodes University, Grahamstown South Africa.
Near-term production from both its silver and gold projects located in the Cobar Basin, Central West, New South Wales
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