Key Takeaways
Rio Tinto and Aluminum Corporation of China Limited (Chalco) have entered into a definitive agreement to acquire a controlling stake in Companhia Brasileira de Alumínio (CBA) from Votorantim, according to International Mining and Mining Technology.
Australia's National Electricity Market added 1.8 GW of generation and battery capacity in Q4 2025, according to PV Magazine, reflecting continued renewable energy expansion in the region.
Cyclic Materials announced an $82 million investment in a new rare earth recycling campus in McBee, South Carolina, according to Mining Technology, signaling growing focus on critical mineral supply chains.
Sweden deployed 652 MW of solar capacity in 2025, though this represented a decline from the prior year despite record growth in large-scale installations, according to PV Magazine.
Behind-the-meter generation is scaling up to meet U.S. demand, with projects such as the planned 7 GW GW Ranch microgrid in Texas highlighting a shift toward private grids, according to PV Magazine.
Oil & Gas Markets
This week's oil and gas coverage focused primarily on technical research and geological studies rather than market developments or price movements. According to Petroleum Science, multiple peer-reviewed articles examined shale gas and shale oil characteristics, including studies on helium accumulation mechanisms in shale gas, pore water occurrence and distribution in gas shales, and thermal maturity effects on microscopic pore structure and gas adsorption capacity.
Additional technical research covered in Petroleum Science included analysis of the Early Jurassic lake water in the northern Sichuan Basin, fractal models for predicting relative permeability in tight oil reservoirs, and flow characteristics of shale oil in the Lucaogou Formation of the Junggar Basin. These studies represent ongoing efforts to improve understanding of hydrocarbon accumulation and extraction mechanisms.
Limited market-moving developments were reported in the oil and gas sector this week. Investors seeking broader commodity market context should note that Investing.com Commodities reported on crude oil price dynamics, including analysis that "China's Crude Hoarding Is Propping Up Oil Prices" and that "India's Reliance Slashes Russian Crude Imports Under US Sanctions Pressure," though detailed price data and market impacts were not provided in available coverage.
Renewable Energy Developments
Renewable energy capacity additions continued their global expansion this week, with significant developments across multiple regions. According to PV Magazine, Australia's National Electricity Market added 1.8 GW in generation and battery projects during the fourth quarter of 2025, demonstrating sustained momentum in the region's energy transition.
In Europe, Sweden deployed 652 MW of solar capacity in 2025, according to PV Magazine. However, the Swedish solar association Svensk Solenergi noted that this represented a decline compared to the prior year, despite record growth in the large-scale segment. The association predicted that 2025 was "likely the bottom" of Sweden's installation cycle, suggesting expectations for recovery in coming years.
Behind-the-meter generation is emerging as a significant trend in the U.S. market. According to PV Magazine, Pacifico Energy Chief Operating Officer Kevin Pratt highlighted projects such as the planned 7 GW GW Ranch microgrid in Texas as evidence of a broader shift toward private grids. Developers are pursuing this approach "as they seek faster, more reliable" deployment pathways compared to traditional grid-connected projects.
Additional renewable developments included technical advances and safety improvements. According to PV Magazine, survey data from the U.S.-based Solar and Fire Education training program showed that 98% of participating firefighters would recommend microinverter-based rooftop solar systems, citing safety advantages. The UK-based perovskite solar specialist Power Roll announced a new metrology research project with Swansea University and a development agreement with Renolit, a German plastic films and sheets manufacturer, according to PV Magazine. Korean researchers also improved the performance of tin monosulfide (SnS) solar cells with a potassium fluoride-assisted post-treatment, according to PV Magazine.
On the heating technology front, Dutch utility Eneco is testing low-noise air-to-water heat pumps from startup Whspr in approximately 20 homes, aiming to ease installation constraints near property boundaries, according to PV Magazine. The systems reportedly achieve reduced noise levels compared to conventional models.
Mining & Critical Minerals
Major consolidation activity dominated the mining sector this week, with significant developments in aluminum and rare earth elements. According to International Mining and Mining Technology, Rio Tinto and Aluminum Corporation of China Limited (Chalco) have entered into a definitive agreement to jointly acquire a controlling stake in Companhia Brasileira de Alumínio (CBA) from Votorantim. The joint venture will be owned 33% by Rio Tinto and 67% by Chalco, according to both sources.
Rare earth recycling attracted substantial investment capital this week. According to Mining Technology, Cyclic Materials announced an investment of over $82 million in a new rare earth recycling campus located in McBee, South Carolina. This investment reflects growing industry focus on securing critical mineral supply chains through domestic recycling capabilities.
Operational developments continued across the sector. According to International Mining, Navoi Mining & Metallurgical Company (NMMC) commissioned a new grinding mill for its Kokpatas and Daugyztau gold operations as part of ongoing investment in production capacity expansion. Additionally, according to International Mining, BHP is increasingly leveraging artificial intelligence to improve safety, reliability, and performance across its operations, with the company looking for practical ways to meet rising demand through enhanced operational understanding.
Exploration activity also remained active. According to Mining Technology, TomaGold unveiled assay results from drill holes at its Berrigan Mine project in the Chibougamau mining camp in Quebec, Canada. Additionally, according to MINING.COM, McEwen announced plans to acquire Golden Lake Exploration, consolidating the Gold Bar complex, with Golden Lake's principal asset being its 100%-owned Jewel Ridge projects adjacent to McEwen's Windfall and Lookout Mountain discoveries in Nevada.
However, security concerns emerged in the sector. According to MINING.COM, Vizsla Silver reported that 10 employees were abducted in Sinaloa, Mexico, when armed men entered staff accommodations and forcibly removed workers including engineers, geologists, security personnel, and administrative staff.
Commodity Markets
Precious metals markets experienced significant volatility this week. According to Investing.com Commodities, gold and silver faced sharp reversals from record highs, with analysis indicating that "Gold and Silver Fall After Record Highs Trigger Sharp Volatility." The same source noted that "Gold Steadies Near Highs as Defensive Flows Reshape Market Behavior," suggesting ongoing support from risk-averse positioning despite near-term pullback risks.
According to Investing.com Commodities, "Silver Tests Rising Wedge Support as Momentum Weakens," indicating technical pressure on the precious metal. Additional analysis from Investing.com Commodities suggested that "Gold Faces Near-Term Pullback Risk as Political Uncertainty Underpins the Upside," highlighting the complex interplay between geopolitical factors and technical market dynamics.
Week Ahead Preview
Energy market participants should continue monitoring developments in aluminum sector consolidation, as the Rio Tinto-Chalco-CBA transaction progresses through regulatory approval processes. Renewable energy capacity additions are expected to remain a focus area, particularly regarding behind-the-meter generation scaling and grid modernization efforts. Critical mineral supply chain developments, particularly in rare earth recycling, will warrant close attention given the $82 million Cyclic Materials investment and broader industry focus on domestic sourcing.
This weekly recap is compiled from coverage by PV Magazine, International Mining, Mining Technology, MINING.COM, Petroleum Science, and Investing.com Commodities. For daily updates, visit energystandard.io.