Ring of Fire Ontario: Chromite and Nickel Deposits, Owners

The Ring of Fire in northern Ontario is a group of chromite and nickel-copper-PGE deposits near McFaulds Lake, in peatland with no all-season road. Its best-known deposits are Eagle’s Nest (nickel, copper, platinum group elements) and Black Thor (chromite). Road construction began in summer 2026 and Ottawa pledged C$1 billion in October 2026, but no mine has been approved for construction.

If you hold ground, raise money or advise a board here, the questions are short: what is in the ground, who owns it, when can a truck get there, and what does it cost to keep claims alive and drill them. This page answers each one from Ontario, federal and company sources checked in November 2026.

This is a district brief, not a gold guide. For Ontario’s gold camps see our gold deposits in Ontario guide, and for how other countries run their registers, our mining cadastre portal guide by country.

Eagle’s Nest sits under about eight metres of limestone and sandstone, on a pipe-like body roughly 200 metres long.

What is the Ring of Fire in Ontario, and where is it?

Start with the official description. The Government of Ontario’s page on the district places the area more than 500 kilometres northeast of Thunder Bay, gives its active claim area as about 8,000 square kilometres, and lists chromite, copper, nickel, platinum and titanium among its critical minerals. The same page claims Ontario’s critical minerals could create more than 70,000 jobs and add over $22 billion to the economy over 30 years. Treat those as government projections, not as a forecast for any one project.

Chart

Nickel mined in Canada by province, 2024

Thousand tonnes of nickel mined, preliminary figures

The deposits cluster around McFaulds Lake in the Kenora District. Federal filings for the Eagle’s Nest mine put the site about 540 km north of Thunder Bay and 240 km west of James Bay, so you will see both distances quoted. There is no all-season road. Today the camp is reached by air or by winter road, which is why the road approvals and first construction of 2026 matter so much.

Nine First Nations belong to Matawa First Nations Management, a non-profit tribal council founded in 1988: Aroland, Constance Lake, Eabametoong, Ginoogaming, Long Lake #58, Marten Falls, Neskantaga, Nibinamik and Webequie. Matawa says eight of them are in the Treaty 9 area, five are reached only by air and winter road, and together they have more than 10,000 people. Webequie and Marten Falls are the two communities leading the road projects.

Why it matters for Canada’s nickel supply

Canada is already a nickel producer, which is why a new district gets attention. Natural Resources Canada reports 125,364 tonnes of nickel mined in 2024 (preliminary), fourth in the world with about 3.5% of global output. Ontario led the provinces with 50,000 tonnes, or 39.9%. Nickel from here would add a new Ontario nickel district far to the north, alongside large chromite resources.

Ring of Fire mineral deposits: chromite, nickel and their geology

Most of the named deposits sit on one intrusion. The Ontario Mineral Inventory record for the Black Creek chromite deposit describes the McFaulds Lake mafic-ultramafic sill, also called the Ring of Fire Intrusion, emplaced along a granodiorite-greenstone contact over about 20 km. About 15 km of it is known to be mineralized, from the Blackbird deposit in the southwest to Black Thor and Black Label in the northeast. A thin cap of Paleozoic sedimentary rock, mainly limestone and less than 40 m thick, lies over the volcanic package.

Chart

Published chromite resources by deposit

Million tonnes; categories and years differ, so do not add them

Two very different deposit types share that sill. Chromite forms layers in the olivine-rich base of the intrusion. Nickel, copper and platinum group elements (PGE) sit in magmatic sulphides, where molten sulphide separated from the magma and sank. The minerals therefore split into a bulk chromite story and a high-grade nickel-copper-PGE story, with very different plants and markets.

Eagle’s Nest: the nickel-copper-PGE deposit

The Eagle’s Nest record calls it a magmatic massive sulphide deposit in a serpentinized peridotite dyke: a pipe-like body about 200 m long and up to tens of metres thick, with granodiorite in the footwall and about 8 m of dolomitic limestone and sandstone on top. Airborne geophysics was flown in 2003. Noront Resources drilled 127 holes totalling 63,076 m between 2007 and 2011, starting with 29 holes in 2007.

The record lists a 2012 NI 43-101 Proven and Probable Mineral Reserve of 11.1 million tonnes at 1.68% nickel, 0.87% copper, 0.89 g/t platinum and 3.09 g/t palladium. Within that, the Proven part is 5.26 Mt at 2.02% nickel and the Probable part is 5.87 Mt at 1.38% nickel. Separately, it lists a Measured and Indicated Mineral Resource of 11.0 Mt at 1.78% nickel and Inferred resources of 8.97 Mt in the Main Zone and 1.62 Mt in the East Zone.

A 2012 reserve is not a 2026 mine plan. These are the most recent NI 43-101 figures in the provincial record, and they are more than a decade old. The mine concept has changed since, so check SEDAR+ for any newer technical report before you quote Eagle’s Nest tonnes in a deck. Our NI 43-101 explainer covers what each category means.

Black Thor, Black Label, Big Daddy and other chromite deposits

Black Thor is the big one. The Black Thor record describes stratiform massive chromite hosted in dunite within a layered intrusion. It lists a 2012 Measured and Indicated resource of 137.7 Mt at 31.5% Cr₂O₃ and an Inferred resource of 26.8 Mt at 29.3% Cr₂O₃, both at a 20% cut-off and both reported in Cliffs Natural Resources’ annual report. Cliffs placed the project on care and maintenance on 20 November 2013.

Nearby deposits fill out the chromite inventory. The Canadian Chrome Company (formerly KWG Resources) reports an Inferred resource of 85.9 Mt at 34.5% Cr₂O₃ for Black Horse, from a 2015 technical report, and Measured 23.3 Mt at 32.1% plus Indicated 5.8 Mt at 30.1% for Big Daddy, from 2014. The Black Creek record lists 8.6 Mt Measured and Indicated at about 37.4% Cr₂O₃. All of these are resources, not reserves. A chromite grade is quoted as % Cr₂O₃, the chromium oxide content of the rock, and cut-off grade is the lowest grade counted in the estimate.

Main deposits and holders. Sources: Ontario Mineral Inventory records, the Cliffs 2015 sale release, Impact Assessment Agency of Canada, and company sites linked in the next section.

Chromite versus nickel deposits: how they differ for a buyer

The two deposit types answer different questions. Ore deposit types differ in how they are mined and sold, and these two are a clear example.

Ring of Fire mining companies: who owns what now

Searches for the companies here still turn up names that no longer hold ground. Cliffs Natural Resources sold its chromite assets in 2015: its 28 April 2015 release announced the sale to Noront Resources for US$27.5 million, covering three chromite deposits and associated claims. Those were Black Thor, Black Label and a 70% interest in Big Daddy, now operated by Wyloo. Noront is now part of Wyloo: Ontario’s registry says Noront signed the original Eagle’s Nest assessment agreement in 2011 and that Wyloo now seeks to develop the mine, and the federal registry lists Wyloo Ring of Fire Ltd. as proponent.

These are the main holders named on company sites and government filings as of November 2026:

• Wyloo Ring of Fire Ltd. (private, part of Wyloo): Eagle’s Nest, Black Thor, Black Label and 70% of Big Daddy. The largest holder of the published deposits listed here.
• The Canadian Chrome Company (CSE: CACR, formerly KWG Resources): 30% of Big Daddy, interests in Black Horse at Koper Lake, and mining claims along a 330 km rail route it promotes through the wetlands.
• Bold Ventures (TSXV: BOL): a property in the area of 873 claim cells covering 16,785 ha near McFaulds Lake, plus a 10% carried interest in the Black Horse chromite resource.

The Canadian Chrome and Bold Ventures sites describe the Black Horse joint venture split differently, so read both companies’ filings before relying on either number. Other juniors also hold claims in the district; the province’s online claim map shows every current holder. Our Canada mineral deposits map puts the district in national context.

Mining here is a road and permit trade first. Every company here is exposed to the same timeline: roads, power, consultation and permits. A junior’s claims near a future road corridor and a junior’s claims 60 km from one carry very different time risk. General information, not investment advice.

Where the Eagle’s Nest mine stands now

Two assessment steps have fallen away, and that is often misread as a green light. In Ontario, the Environmental Registry notice 025-0396 records that the old voluntary agreement for a comprehensive environmental assessment was ended and its terms of reference revoked by Bill 5, the Protect Ontario by Unleashing our Economy Act, 2025, effective 5 June 2025. The province says the project changed a lot since 2015 and stays subject to environmental oversight and the duty to consult.

Federally, the Impact Assessment Agency of Canada posted its decision on 20 February 2026 that the project does not warrant designation under the Impact Assessment Act. The registry describes an underground nickel, copper and PGE mine producing about 3,000 tonnes of ore a day for roughly 12 to 15 years, on a surface footprint of about 100 ha. Neither decision is a permit to build. Construction would still need provincial permits, a closure plan and a road.

At the defaults, one million tonnes at 1.5% nickel holds 15,000 tonnes of nickel. At 80% recovery that is 12,000 recoverable tonnes, worth about US$192 million gross at the calculator’s example price of US$16,000 per tonne, before a single dollar of cost. Try Eagle’s Nest’s 2012 reserve figures (11.1 Mt at 1.68%) to see why the deposit draws attention, then remember the road does not exist yet.

▶ How tonnage and grade estimates are built, and which inputs are measured versus assumed. · 2:54

Ring of Fire roads: what is approved, funded and still open

Four road pieces make up the planned road network, and the province’s March 2026 road delivery schedule names them: the Webequie Supply Road, the Northern Road Link, the Marten Falls Community Access Road, and upgrades to the Anaconda and Painter Lake roads. The same document says Ontario signed partnership agreements with three First Nations in 2025 and a co-operation agreement with the federal government to avoid duplicate environmental and impact assessments.

Chart

Years until each road opens

Years after 2025: initial plan vs accelerated plan (March 2026)

• Webequie Supply Road. Proposed by Webequie First Nation as a 107 km all-season road from the Webequie airport to the McFaulds Lake area. Ontario’s project page records approval in June 2026 for the 90 km off-reserve portion, and Order in Council 929/2026 sets the conditions.
• Marten Falls Community Access Road. About 184 km from the end of the Painter Lake forestry road north of Nakina to Marten Falls. Ontario’s project page shows the decision to approve on 26 August 2026, and the federal government issued its Decision Statement the same month.
• Northern Road Link. Proposed jointly by Marten Falls and Webequie to join the two roads. Its terms of reference were approved on 3 March 2023, and the province’s schedule runs its assessment to spring 2028.
• Highways 584 and 643. Ontario says upgrades at the gateway to the region were completed in November 2024.

The Webequie approval comes with real conditions, not a blank cheque. The order requires a compliance monitoring program, an environment committee that invites Indigenous communities, wetland carbon dioxide and methane monitoring, moose and eastern migratory caribou programs, and cumulative-effects monitoring coordinated with the Marten Falls and Northern Road Link projects. Ontario’s schedule also lists federal permits it wants sped up, including Fisheries Act and Species at Risk Act authorizations for caribou and lake sturgeon.

Map your claims against the road study areas. The province’s map shows study areas and preferred routes, and warns that final routing depends on finished assessments and consultation. Overlay your claim boundary on those study areas before you budget a program around road access; a preferred route is not a built road.

The money question moved on 21 October 2026. The Canadian Press reported that Prime Minister Carney pledged C$1 billion to match Ontario’s C$1 billion for road infrastructure, within an C$8.7 billion joint package for Ontario industry. Premier Ford said work on the roads began that summer. Neskantaga and Attawapiskat First Nations have built a settlement where the proposed road would cross the Attawapiskat River, and members plan to block it, so funding does not settle consent. Until the Northern Road Link is approved and built, there is no continuous road from the provincial highway network to Eagle’s Nest.

Permits, First Nations and mining claims in the district

Consent and consultation shape every timeline here. Ontario says it works with Indigenous partners through bilateral agreements, and the road approvals are led by Webequie and Marten Falls. Not every nearby community agrees: CBC reported in January 2024 that some First Nations still oppose development in the region. A junior that plans a program without early contact with the closest communities is planning a delay.

Infographic

From open ground to a drill hole

1. 1Check the MLAS mapActive claims and withdrawn land are shown online.
2. 2Licence and cellsA C$40 five-year prospector’s licence, then C$50 a cell.
3. 3Plan or permitCirculated to affected Indigenous communities; a plan takes effect on day 30, a permit takes 31 to 50 days.
4. 4Assessment workC$400 of approved work per cell each year.
5. 5Drill and reportHeavier drills need a permit; file the work for credit.

A wider study runs in parallel. The federal Regional Assessment in the Ring of Fire Area moved to its next phase in January 2025, when 15 First Nation partners and the Impact Assessment Agency finalized its terms of reference. A working group of community members and the agency runs it, with administrative support from Matawa and Mushkegowuk councils, and its report goes to the Chiefs and the federal environment minister.

Provincial rules that changed for the Far North

Two legal changes matter for anyone reading older analysis of the district. First, the Far North Act amendments of December 2021 repealed section 12, so development where no community-based land use plan exists no longer needs a special order under that Act; other approvals still apply. Second, Ontario says its newer legislation lets it name regions with several critical mineral deposits as regions of strategic importance, including the district, under a “One Project, One Process” approval model.

Check the rules before you file in the Far North. General information, not legal advice; confirm with the Ontario Ministry of Energy and Mines and the Ministry of the Environment, Conservation and Parks before relying on any fee, deadline or approval path. Rules for the district changed in 2021, 2025 and 2026, and may change again.

How to stake a mining claim here

Claims here follow the same online system as the rest of the province. You register cells in the Mining Lands Administration System (MLAS), whose Map Viewer shows active claims and withdrawn land. The ministry’s glossary defines each cell as 15 seconds of latitude by 22.5 seconds of longitude. By our arithmetic that is about 19.5 ha (48 acres) at McFaulds Lake’s latitude, smaller than further south.

The fees are modest; the work commitment is not. The mining lands fee schedule, updated 1 April 2026, charges C$50 per cell to register and C$40 for a five-year prospector’s licence. The ministry’s decision on ERO notice 019-6053, posted 6 June 2023, keeps the requirement at C$400 of assessment work per cell each year. Under the assessment credits policy, a claim can be credited for the current year plus five more.

At the defaults, a 25-cell block costs C$1,250 to register and needs C$30,000 of approved work over three assessment years, about 488 ha in all. In the district, budget separately for flying, winter-road timing and consultation, which this calculator leaves out.

Plans, permits and the consultation clock

A claim lets you hold ground, not disturb it. Ontario’s exploration plans and permits guide says plans and permits are circulated to potentially affected Aboriginal communities and consulted on. A plan takes effect 30 days after circulation and lasts two years. A permit is posted on the Environmental Registry for 30 days, processing is expected to take 31 to 50 days, and the guide asks for start dates more than 35 days (plan) or 55 days (permit) after you submit. Surface rights owners must get notice where they exist.

Before anyone lands a crew. Stake or hold a valid claim and a current prospector’s licence first. Contact the nearest First Nations early and respect the consultation steps in Ontario’s plan and permit process; in this district that means the Matawa communities and any others the ministry identifies. Notify surface rights owners where they exist. Never use mercury. Stay off other holders’ claims and out of parks, conservation reserves and land the MLAS map shows as withdrawn.

Why exploration is hard here: muskeg, cover and access

The ground itself is the first obstacle. A 2014 review in Arctic, Antarctic, and Alpine Research calls the Hudson Bay Lowlands the largest peatland complex in North America. It says Ontario’s Far North covers about 45 million hectares, that peatlands make up nearly half of it, and that the lowlands have the southernmost non-alpine permafrost on the continent. In fieldwork, that peat, or muskeg, means soft ground in summer and frozen access only in winter.

Then there is cover. Eagle’s Nest lies under about 8 m of limestone and sandstone, and the intrusion is capped by up to 40 m of Paleozoic rock. Nobody found these deposits by walking outcrop. The provincial records show airborne geophysics first, then ground geophysics and gravity, then drilling. If you want to understand why magnetics and electromagnetics led here, our geophysics methods guide walks through what each survey sees.

What satellites can and cannot see over these claims

Be honest about this terrain. Optical satellites read the surface, and here the surface is peat, water and forest sitting on limestone, not the ultramafic rock that hosts the metal. A spectral image will not show chromite or nickel sulphide under that cover. Cloud is the next problem: optical images can only be used on clear days, while radar can see through cloud, which matters in a short northern field season.

Where remote sensing does help on these claims:

• Access and logistics: mapping eskers, drier ridges, lakes for float planes and winter-road crossings from repeat imagery.
• Wetland and water mapping: a baseline of peatland, open water and drainage before a program, useful where approvals ask for wetland monitoring.
• Change detection: tracking camp, trail and drill-pad disturbance against that baseline for reporting.
• Screening the edges: where the Shield rises out of the lowlands, exposed bedrock and structure can be read and ranked before ground work.

That last point is where Farmonaut’s satellite-based mineral detection fits best: exposed or thinly covered ground, delivered in 5 to 20 business days from a KML, KMZ or polygon, as exploration targets ahead of any resource estimate, not NI 43-101 figures. You can get a quote for a block you already hold.

▶ The three limits of satellite exploration that matter in due diligence, and where drilling takes over. · 2:08

Outlook for nickel and chromite: prices, timing and what to watch

Nickel prices move a lot, and projects here will be judged on the price when a mine is financed. NRCan’s nickel price series shows annual averages of monthly prices ranging from US$9,595 per tonne in 2016 to US$25,834 in 2022, then US$16,814 in 2024. Trading Economics showed about US$16,347 per tonne on 5 November 2026, and reported the International Nickel Study Group now expects a surplus of 19,000 tonnes in 2026 and 70,000 tonnes in 2027.

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Nickel price, annual average of monthly prices

US dollars per tonne, selected years printed by NRCan

Chromite is a different market. It is sold mainly to make ferrochrome for stainless steel, and USGS Mineral Commodity Summaries 2026 gives a chromite ore price of about US$290 per tonne (gross weight) for 2025, down from US$331 in 2024. South Africa alone produced an estimated 23 million tonnes in 2025. Canada is not among the producers USGS names, so a mine here would be a new source. See our chrome ore price guide for how ore is priced.

What to watch over the next two years, in order of how much it moves the district:

• Webequie and Marten Falls road construction: watch how the C$1 billion federal money is divided, federal permits, and whether the planned river-crossing protest affects the work.
• Northern Road Link assessment: the missing middle piece; the schedule runs its assessment to spring 2028.
• A new Eagle’s Nest technical report: any updated NI 43-101 study filed on SEDAR+ would replace the 2012 figures.
• Community agreements: partnership agreements with the closest First Nations, and the federal regional assessment report.
• Power and processing: Ontario lists transmission planning for the region; where concentrate and chromite would be processed is still open.

Read the next study like a lender would. When a new study appears, check four things first: the price deck, the road assumption, the processing route and the category of every tonne. Our feasibility study guide explains scoping, prefeasibility and feasibility, and our exploration drilling guide covers how holes get planned and costed.

▶ How a set of targets becomes a drill order you can defend. · 2:19

What to check before you buy or fund ground here

Claim buyers, consultants and investors face the same few tests, and most can be done from public records before anyone flies north. No check below predicts a discovery; each one narrows the risk you are taking on.

1. Title and standing. Open the MLAS Map Viewer and confirm the holder, the anniversary date and any withdrawn land. Ask the seller for the assessment work filed and the credits still in reserve, because a block that is short on work can lapse.
2. Distance from a road corridor. Overlay the boundary on the province’s study areas and preferred routes. Treat a preferred route as a plan, and remember the link between the two southern roads is not yet approved.
3. Which deposit type the geology supports. Find the nearest published deposit and ask whether the ground lies along the same intrusion. A location near Eagle’s Nest does not by itself show a similar body, since that deposit is only about 200 m long.
4. Which community relationships exist. Ask which First Nations have been contacted, what was agreed in writing, and how long past plans or permits took to clear circulation.
5. What the numbers really are. Check the category, year and author of each resource figure. Many public figures here date from 2012 to 2015, so ask for the newest report on SEDAR+ and whether the price and access assumptions still hold.
6. What the next dollar buys. Under thick cover, ask whether a budget funds geophysics and drilling that test bedrock, or only surface work that cannot see it.

Frequently asked questions

What is the Ring of Fire in Ontario?

It is a mineral district in Ontario’s Far North, near McFaulds Lake in the Kenora District, with an active claim area of about 8,000 km² according to the province. It hosts the Eagle’s Nest nickel-copper-PGE deposit and several large chromite deposits, including Black Thor.

Where is it located?

Ontario places it more than 500 km northeast of Thunder Bay; federal filings for Eagle’s Nest say about 540 km north of Thunder Bay and 240 km west of James Bay. It sits in the Hudson Bay Lowlands and has no all-season road yet.

What minerals are in the Ring of Fire?

Ontario lists chromite, copper, nickel, platinum and titanium. In practice the district has two deposit types: chromite layers such as Black Thor, Black Label, Big Daddy and Black Horse, and nickel-copper-PGE sulphides at Eagle’s Nest.

Which mining companies hold ground there?

The largest holder is Wyloo, with Eagle’s Nest, Black Thor, Black Label and 70% of Big Daddy. The Canadian Chrome Company (CSE: CACR, formerly KWG Resources) and Bold Ventures (TSXV: BOL) hold other chromite interests and claims. Cliffs and Noront are former owners. Not investment advice.

Is there a road to the McFaulds Lake deposits yet?

Not an all-season one. Ontario approved the Webequie Supply Road in June 2026 and the Marten Falls Community Access Road in August 2026, and Premier Ford said work began that summer. The Northern Road Link that would join them is still being assessed, and the province’s plan has roads opening from November 2030.

When could Eagle’s Nest become a mine?

No date is confirmed. Ontario ended the old provincial assessment in June 2025, and Ottawa decided in February 2026 not to designate the project, but provincial permits, a closure plan and road access are still needed before construction.

Which First Nations are involved?

Nine First Nations belong to the Matawa council: Aroland, Constance Lake, Eabametoong, Ginoogaming, Long Lake #58, Marten Falls, Neskantaga, Nibinamik and Webequie. Webequie and Marten Falls lead the road projects, 15 First Nations are partners in the federal regional assessment, and some communities still oppose development in the region.

How do you stake a mining claim there?

Buy a prospector’s licence (C$40) and register cells online in MLAS at C$50 per cell, after checking the Map Viewer for open ground. Each cell then needs C$400 of approved assessment work a year. Confirm current rules with the Ministry of Energy and Mines.

Why is exploration there so hard?

The area is peatland with patches of permafrost, there is no road, and the bedrock is hidden under peat and a limestone cap. Crews fly in or use winter roads, and drill programs need plans or permits that are circulated to First Nations first.

Can satellites find nickel or chromite there?

Not directly under thick peat and limestone. Satellites help there with access, wetland mapping and change detection, while geophysics and drilling find the ore. On exposed or thinly covered ground nearby, satellite screening can rank targets before fieldwork.

Is it a good investment?

We do not give investment advice. The district has large published resources, but timing depends on roads, permits, community agreements and metal prices, and most public figures are more than ten years old. Read each company’s latest filings and get independent advice.

How much chromite has been published?

Published figures include 137.7 Mt Measured and Indicated at 31.5% Cr₂O₃ at Black Thor (2012), 85.9 Mt Inferred at 34.5% at Black Horse (2015), and 29.1 Mt Measured and Indicated at Big Daddy (2014). These are separate categories from separate reports, so they should not be added into one total.

How much nickel is at Eagle’s Nest?

The provincial record lists a 2012 reserve of 11.1 Mt at 1.68% nickel, which is about 186,000 tonnes of contained nickel by our arithmetic, before mining and processing losses.

Who pays for the roads?

Ontario has committed C$1 billion, and on 21 October 2026 Ottawa pledged to match it. Reports did not give the split between road projects.