Mining Press Roundup: Peru Copper Halt Deepens South America's Supply Squeeze

Copper's South American supply crunch got measurably worse this week. MMG Ltd. halted operations at its giant Las Bambas mine in Peru after a fatal workplace accident, layering a fresh disruption onto a market already rattled by storm damage in Chile. With copper miners' equities (COPX) up 3.2% on the day according to market data, and gold and silver both posting sharp gains, today's press releases paint a picture of capital rotating hard into metals -- even as junior explorers in Guyana, Suriname and Western Australia deliver some of the most eye-catching resource and deal news of the year.

MMG: Las Bambas Halt Adds to Copper's South American Woes

MMG Ltd. suspended operations at its Las Bambas mine in Peru after an accident killed two workers, adding another disruption to South American copper supply as concentrate availability remains tight. The accident occurred Aug. 18 during pump replacement work at a clarification pond about 9 km from the processing plant, killing two workers and injuring three others. Peru's labor watchdog, Sunafil, has opened its own investigation and sent inspectors to the site to determine the circumstances surrounding the accident.

The good news for the market is that the shutdown looks short-lived: MMG expects operations to restart progressively from Aug. 21 and has not announced a change to its 2026 copper production guidance. But the incident lands on a mine with a long history of trouble. Las Bambas is one of Peru's largest copper mines and produced 410,829 tonnes of copper in 2025, according to the country's Ministry of Energy and Mines data, and accounts for about 2% of global copper output. Since ramping up a decade ago, the operation has experienced about 600 days of disruptions, according to estimates cited by Reuters, mostly tied to community protests over benefit-sharing along its concentrate haul road.

This latest halt arrives alongside separate weather-driven troubles at Lundin Mining's Caserones operation in Chile, where severe weather in Chile has prolonged Caserones disruptions, pushing up costs and extending the mine's recovery timeline. Together, the two incidents underscore why Sprott and other analysts have been warning that mine-level shortages, not just demand growth, are behind copper's persistent price strength this year -- a dynamic reflected in COPX's 3.2% gain to $88.28 on Wednesday, per Polygon data.

Omai Gold Mines: Guyana Project Valued at $4 Billion

Omai Gold Mines delivered one of the day's biggest numbers. A new preliminary economic assessment positions the Guyana project among the largest and most valuable undeveloped gold projects in South America, with a $4-billion value, discounted at 5%, assuming a gold price of $3,600 per oz., contrasting with $1.42 billion in initial capital costs. The study outlines a 24% internal rate of return and a 4.1-year payback period for the past-producing project that could mine 6.3 million oz. of gold over an 18-year life.

At current bullion prices, the numbers get even bigger: the company reported that at the recent spot price of $4,200/oz, the after-tax NPV5% increases to $5.5 billion, IRR increases to 30% and the payback reduces to 3.4 years. CEO Elaine Ellingham called the study a reinforcement of "the potential for Omai to become a very large-scale mining operation with a clear path to bringing significant economic benefits to the people of Guyana." Omai is a genuine comeback story -- the project is one of South America's largest past-producing gold mines, having yielded more than 3.7 million oz. between 1993 and 2005, and Guyana has in recent years emerged as a choice gold jurisdiction, drawing investment with its stable mining regime, improving infrastructure and an array of discoveries.

Gold Fields: $55M Bet Deepens Suriname Push at Founders Metals

Major gold producer Gold Fields is doubling down on the Guiana Shield's other emerging gold address. The company is investing another $77 million (US$55.7 million) to raise its stake in Suriname explorer Founders Metals to just under 20%. The capital injection helps Vancouver-based Founders buy out Nana Resources, its local partner at the Antino gold project, for $17 million in cash, 13.6 million shares and as much as $21 million in milestone payments, with Nana selling its 30% interest in Lawa Gold, which holds the Antino mineral rights and infrastructure.

Founders CEO Colin Padget framed the consolidation as "a defining moment for Founders," giving the explorer control of the entire district as "we enter the most important phase of its growth," and called Gold Fields' backing "a powerful endorsement." The Antino project sits on the same geological trend as some of the region's biggest producers -- it is located on the Guiana Shield, which hosts Newmont's Merian and Zijin Mining's Rosebel mines in Suriname. Notably, Founders has now drawn interest from more than one major, having also secured backing from B2Gold, a dynamic one analysis called structurally unusual for a junior of its size.

Empire Metals: Pitfield Confirmed as World's Largest Titanium Resource

Empire Metals shares jumped after the AIM-listed junior upgraded the resource at its Pitfield project in Western Australia. The company's updated mineral resource estimate puts Pitfield at 8.16 billion tonnes grading 4.3% titanium dioxide, containing 349 million tonnes across the Thomas and Cosgrove deposits, a figure the company says confirms it as the world's largest titanium deposit. The update also establishes Pitfield's first measured resource, increasing confidence in the deposit as Empire advances mine planning and economic studies.

Managing director Shaun Bunn called it "a landmark moment for Empire Metals" that comes "just weeks after we demonstrated an integrated flowsheet based on conventional processing steps to produce 99% pure titanium dioxide." He added that "the high-grade weathered zone sits at surface and lends itself to simple, efficient mining methods." The scale increase is dramatic -- the new figure compares to a maiden October 2025 estimate of 2.2 billion tonnes at 5.1% TiO₂, containing 113 million tonnes. Investors welcomed the news, with shares closing up sharply and the company's market capitalization reaching roughly £388 million.

Sunrise Energy Metals: Friedland's Scandium Bet Wins $400M Pentagon Backing

Robert Friedland's two-decade push into scandium is finally moving toward reality. Sunrise Energy Metals secured a $400-million conditional loan commitment from the US Department of Defense for the Syerston scandium project in New South Wales. CEO Sam Riggall told reporters the deal, unlike Friedland's giant copper projects, is comparatively small in scope: "Robert Friedland and I have done some of the largest copper projects in the world, like Oyu Tolgoi in Mongolia and the Ivanhoe developments in the Congo... This is a tiny project."

Still, the strategic stakes are large. The financing broadens Syerston's scope to include not only the development of the mine and refinery, but also the construction of scandium metal refining capacity in the US, and increased investments in power and water infrastructure. Scandium is used in defense and aerospace alloys, and the deal is notable because, as one industry summary put it, scandium is currently obtained only as a byproduct of other industrial processes, with foreign competitors accounting for roughly 80% of global mining production. Sunrise has also locked in early demand, having struck a deal with Lockheed Martin to sell the defence and aerospace manufacturer 25 percent of its scandium output for the first five years of the mine.

Ramaco Resources: Gallium, Germanium MOU with Indium Corp for Brook Mine

Ramaco Resources is lining up buyers for the critical minerals it hopes to pull out of its Wyoming coal country project. The company entered into a non-binding memorandum of understanding with Indium Corporation for supply of gallium and germanium from Ramaco's Brook mine rare earth and critical-mineral project in Wyoming. Ramaco describes Brook as holding what is believed to be the nation's largest unconventional deposit of rare earth elements and critical minerals sourced from coal and carbonaceous ore, and notes that full-scale mining and construction of a pilot processing facility are underway at the mine.

CEO Randall Atkins said the partnership with Indium -- a specialty materials supplier to the semiconductor and defense industries -- "demonstrates a promising opportunity to introduce Brook Mine gallium and germanium into established domestic and allied supply chains," adding that combining the two companies' capabilities "could strengthen and diversify the supply of materials that are increasingly critical to the U.S. electronics, semiconductor, and advanced manufacturing industries." The deal is Ramaco's second such gallium-focused MOU in recent weeks, following a separate agreement with gallium-nitride semiconductor firm Bedrock, underscoring how aggressively the company is marketing Brook's byproduct potential even before full-scale production begins.

What It Means

The through-line across today's news is that capital is chasing supply security wherever it can find it -- and paying a premium to get there. Gold miners are plowing tens of millions into early-stage Guiana Shield juniors even as those same juniors haven't yet published maiden resource estimates, a bet on discovery potential in a jurisdiction increasingly seen as an alternative to more mature gold camps. Meanwhile, Washington's willingness to write nine-figure defense loans for scandium, alongside its earlier backing for rare-earth and magnet projects, signals that critical-minerals nationalism is now a durable feature of mining finance, not a one-off.

Copper remains the most fragile link in the chain. With Las Bambas idled and Lundin's Caserones still recovering from Chilean storms, every incremental disruption in the region is landing on a market that COPX, LME inventory data and Sprott's own commentary suggest was already stretched thin. Add in gold's continued surge -- silver up 6.4% and gold up 4.1% per the latest market data -- and the picture is one of a mining sector where nearly every commodity category, from titanium to scandium to copper to bullion, is drawing fresh capital simultaneously.

This roundup covers press releases published on August 20, 2026. Company announcements are sourced from mining industry wire services. For corrections or updates, contact contact@stakeandpaper.com.