Mining Press Roundup: Rio Tinto's Oyu Tolgoi Blocked as Copper Projects Advance

Protesters blocked copper concentrate exports from Rio Tinto's Oyu Tolgoi mine on Wednesday, disrupting shipments from one of the world's most important copper projects and highlighting the persistent tension between resource nationalism and foreign investment in Mongolia. The mine is expected to be the fourth largest copper mine in the world when fully operational , making the disruption particularly significant for global copper supply chains.

Rio Tinto: Oyu Tolgoi Exports Halted by Protesters

The demonstration, organized by the Radical Reform Movement, temporarily halted traffic on a road used to transport concentrate from the giant copper-gold mine, with the group demanding a larger share of mining revenues for Mongolians . According to the company's statement, the blockade began at 9 a.m. local time on Wednesday, preventing trucks from hauling copper concentrate to the Chinese border .

The mine contributes about 9% of Mongolia's tax revenues and a weeklong blockage could cost the government 35 billion Mongolian Tugrik (US$13.3 million) , according to Oyu Tolgoi LLC. Rio Tinto owns 66% of the mine, with the Mongolian government holding the other 34% . The protest comes amid broader tensions over the project's commercial terms, with Mongolia demanding earlier profit payments and a larger share of revenue, with the government wanting dividend payments accelerated while raising Mongolia's share of returns to about 60% , according to earlier reporting.

Copper is a key ingredient in electric vehicles, power grids, solar panels and wind turbines, making Oyu Tolgoi an important supplier to neighbouring China, the world's largest consumer of the metal . With copper trading at $90.65 in the COPX miners ETF today (up 1.0% according to market data), any extended disruption could pressure already tight global supply.

Surge Copper: Berg Project Economics More Than Double

A prefeasibility study for Surge Copper's Berg project in central British Columbia more than doubles the net present value (NPV) to C$4.6 billion while also doubling the initial costs over a previous study . According to the company's announcement, the project's post-tax NPV at an 8% discount is well above the C$2.1 billion NPV of the preliminary economic assessment from 2023, with the project's internal rate of return gaining 4% to 24%, though costs rose twice as high to C$4.7 billion .

The PFS, prepared within NI 43-101 standards by Ausenco Engineering Canada and Moose Mountain Technical Services, outlines a large-scale conventional open-pit mine operation with a 12,000-tonne-per-day concentrator process plant . Over a projected 28-year mine life, the operation is expected to deliver total production of 8.6 billion pounds of copper equivalent, including 4.9 billion pounds of copper, 602 million pounds of molybdenum, and 89 million pounds of silver .

British Columbia Premier David Eby said the province is encouraged by projects like Surge's Berg copper project to help British Columbia responsibly develop the critical minerals the world needs . The project's access to hydroelectric power positions it as a lower-carbon copper source, potentially commanding premium pricing in an increasingly ESG-conscious market.

Resouro Strategic Metals: $1 Billion Rare Earth-Titanium Project in Brazil

Resouro Strategic Metals has completed a preliminary economic assessment for a starter operation at its flagship Tiros rare earths and titanium project in Brazil that confirms the potential for a billion-dollar operation, with the PEA outlining a post-tax net present value (at 8% discount) of $714.9 million and a post-tax internal rate of return of 44.2% .

The PEA evaluates a phased development strategy commencing with a 500,000 tonnes per annum starter operation, demonstrating strong economics with low upfront capital intensity relative to project scale and significant remaining resource for future expansion . According to the company, the starter operation would produce about 90,000 t/y TiO₂ concentrate and 3,636 t/y TREO over an initial 20-year mine life .

Tiros, located in Minas Gerais, is one of the world's largest deposits in combined rare earths and titanium resources . The dual-revenue model from both titanium dioxide and rare earth product streams provides commodity diversification at a time when critical minerals supply chains are being reoriented away from Chinese dominance. CEO Christopher Eager stated that the project's robust economics are based on high levels of total rare earth oxides and titanium oxide grades, and that starting with a small high-grade operation will minimize the social and environmental impacts, reduce the time to production, and significantly derisk the project .

Lumina Metals: Poland Bets on Copper Valley Strategy

Poland could more than double its copper production through planned mines by Canada's Lumina Metals, bolstering the country's ambitions to become a leading supplier of a metal critical to electrification and industrial growth . Lumina shares surged 19% on their Warsaw Stock Exchange debut Tuesday to 35.5 zlotys (C$13.53), following the company's C$406.2 million April initial public offering in Toronto to advance the Nowa Sól copper project in southwestern Poland .

Lumina plans to develop projects near KGHM's existing mines and smelters, requiring a combined $6.4 billion investment, with the company projecting average annual copper-equivalent production of 390,000 tonnes during the first decade of operation, matching KGHM's current annual copper output in Poland . Prime Minister Donald Tusk said at the Warsaw exchange that Lumina's projects are great opportunities for Poland to significantly increase copper and silver production capacity, with the developments supporting a broader government strategy to create a Polish "Copper Valley" that would extend the country's role beyond mining into refining, manufacturing and other value-added industries .

Poland is already the European Union's largest copper producer through KGHM's operations , and Lumina's projects position the country as a strategic alternative to Chinese-dominated supply chains at a time when Europe is scrambling to secure domestic critical mineral sources.

Montage Gold: Koné Resources Jump 58%

A resource update for Montage Gold's main Koné project in Côte d'Ivoire has expanded total contained gold by almost 58% and grades by 24% over the initial resource from 2024 . According to the company's Monday announcement, the update gives Koné 244 million measured and indicated tonnes grading 0.8 gram gold per tonne for 6.2 million oz. and 93 million inferred tonnes at 0.68 gram gold for about 2 million oz. contained metal .

Montage Gold is currently building the Koné mine at an estimated cost of $800 million, with the company expecting to commission the mine in the fourth quarter of 2026 . The company plans to produce more than 300,000 ounces of gold annually over the first ten years of operation, a level broadly comparable to the Ity mine, the country's current largest producer .

Montage expects to release more resource updates later in the year as its 90,000-metre drill program is ongoing, and it's also drilling 9,000 metres at its Wendé property, about 250 km southeast of Koné and plans to start drilling at its targets in Mauritania later in the year . With gold trading at $4,330/oz today (up 0.3% according to market data), the expanded resource significantly enhances the project's economics ahead of first production later this year.

AbraSilver: Best Hole Yet at Teck-Funded La Coipita

AbraSilver Resource has drilled its best hole yet at La Coipita in Argentina, honing a Teck Resources-funded copper growth story beside its main Diablillos silver-gold project, with hole DDH-LC26-010 cutting 747.5 metres grading 0.69% copper, 0.06 gram gold per tonne and 142 parts per million molybdenum from 396 metres downhole, including 108 metres at 1.06% copper from the same depth .

The drill program is fully funded and operated by a subsidiary of Teck Resources Limited under the terms of the earn-in and joint venture agreement, with the 2026 program comprising 5,248 metres of diamond drilling across seven holes designed to test the limits and vertical continuity of known mineralization at the Yaretas target and evaluate new targets . According to the company, Teck has completed a total of 11,270 m of diamond drilling across 19 holes at La Coipita, representing approximately US$23 million in expenditures to date against the total earn-in commitment of US$20 million, and on completion of these obligations, it is anticipated the parties will form a Joint Venture (80% Teck, 20% AbraSilver) .

AbraSilver shares have gained 250% over the past 12 months, adding another 5% Monday to C$15.79 per share, giving it a market capitalization of C$2.5 billion . The discovery of district-scale copper-gold mineralization in Argentina's prolific San Juan province adds another major project to Teck's copper growth pipeline.

Arafura Rare Earths: Australia's First Ore-to-Oxide Mine

Flush with a recent A$350 million ($246 million) investment, Arafura Rare Earths is looking to a September construction start at its Nolans mine in Australia's Northern Territory that would position it as the country's first vertically integrated rare earths complex, with the May decision to start building the $1.23-billion-capex project coming the same month its total equity financing reached $887 million .

Arafura's production milestone could make it the first rare earths mine in Australia where the ore is mined, processed and separated on site, marking a major step towards a domestic mine-to-oxide supply chain, as Western countries continue working to build rare earth supply chains outside the control of China, which dominates the mining and processing of the metals . The company aims to start ramping up commercial production in late 2029 .

Export Finance Australia has provided a non-binding letter of support for potential backing under the Critical Minerals Strategic Reserve, targeting up to 500 tonnes per annum of neodymium-praseodymium oxide from the project, with Arafura planning to supply Hyundai and Kia in Korea, Siemens Gamesa in Germany, and Traxys units in Luxembourg and the US . The project represents a critical piece of Western efforts to diversify rare earth supply chains away from Chinese control.

What It Means

Today's announcements reveal a mining sector increasingly shaped by geopolitical imperatives around critical minerals supply chains. While Rio Tinto's Oyu Tolgoi blockade demonstrates the persistent risks of resource nationalism in frontier jurisdictions, the wave of copper and rare earth project advances across Canada, Brazil, Poland, and Australia shows capital flowing toward politically stable jurisdictions with strong ESG credentials.

The copper theme dominates—Surge's Berg PFS, Lumina's Polish expansion, and AbraSilver's Teck-backed drilling all target a metal trading near recent highs and essential to electrification. Meanwhile, rare earth projects from Resouro and Arafura are racing to break China's processing stranglehold, backed by government financing and strategic offtake agreements. With the COPX copper miners ETF up 1.0% and gold holding above $4,300/oz, commodity fundamentals continue supporting project economics even as capital costs rise. The question for investors is whether these juniors can execute construction on time and on budget—a challenge that has humbled many predecessors.

This roundup covers press releases published on June 17, 2026. Company announcements are sourced from mining industry wire services. For corrections or updates, contact contact@stakeandpaper.com.