Overview of Mineral Resource Growth in 2025
Boliden is experiencing a year of significant progress in mineral resource growth, underscored by successful exploration initiatives and improved economic assumptions. The operations across key areas like Garpenberg and the Boliden Area have demonstrated a robust increase in mineral resources, showcasing the company's determination to advance its mining capabilities.
Aitik Developments
Changes in Mineral Resources
Aitik has seen a slight reduction in mineral reserves, down by 40 Mtonnes (-4%) mainly due to ongoing mining operations. Nonetheless, a new optimization of resource pits has considerably increased mineral resources, reporting Measured and Indicated Resources of 214 Mtonnes (36%) and Inferred Resources at 63 Mtonnes (20%). In 2025, Aitik milled a total of 39 Mtonnes, bolstered by contributions from the nearby Liikavaara, which started production in 2024 and ramped up output throughout 2025.
Nautanen and the Boliden Area
Mineral Resource Increases in Nautanen
Located about 15 km north of Aitik, Nautanen reported a remarkable increase in mineral resources for the year 2025. Notably, Indicated Resources surged by 7 Mtonnes (51%), while Inferred Resources flourished by 20 Mtonnes (173%). These advancements result from effective exploration campaigns alongside favorable market conditions.
Enhancements in the Boliden Area
The total mineral reserves in the Boliden Area saw an increase of 2.0 Mtonnes (13%). This growth is attributed to all operational mines, including Kankberg, Kristineberg, and Renström, with Kankberg leading the contributions due to higher gold price forecasts. Mineral resource increases were also noted in surrounding developmental projects, primarily due to efficient exploration efforts.
Progress in Garpenberg and Kevitsa
Garpenberg's Resource Management
While Garpenberg's mineral reserves dropped by 1.4 Mtonnes (-1%), successful exploration drilling led to an impressive rise in mineral resources. Noteworthy increases include Measured and Indicated Resources at 16 Mtonnes (84%) and Inferred Resources at 11 Mtonnes (10%). In 2025, Garpenberg significantly milled 3.6 Mtonnes.
Impact of Regulations on Kevitsa
In contrast, Kevitsa experienced a reduction of 9 Mtonnes (-9%) in mineral reserves, primarily influenced by mining operations. Despite this, there was a refreshing rise in Measured and Indicated Resources by 4 Mtonnes (2%), attributed to economic assumptions. The environmental permit secured in mid-2025 is crucial, allowing for mining activities to continue at a rate of 10.5 Mtonnes of ore per annum.
Resources at Tara and New Acquisitions
Tara's Block Model Review
Tara has reviewed its block models this year, leading to an increase of 2.7 Mtonnes (20%) in mineral reserves predominantly due to the conversion of mineral resources. However, there was a slight decline in the Measured and Indicated Resources, with a decrease of 1.2 Mtonnes (-55%), and Inferred Resources decreasing by 3.6 Mtonnes (-10%) owing to various economic and technical revisions.
Acquisition of Somincor and Zinkgruvan
April 2025 marked the successful acquisition of Somincor and Zinkgruvan, which are now incorporated into Boliden’s reports. A notable reporting shift now excludes mineral reserves from the mineral resource figures, simplifying the mining operations understandings.
Mineral Resource Classification and Reporting Standards
Understanding Classifications
Mineral resources and reserves are meticulously classified into different categories, ensuring that economic conditions—including cost and metal price assumptions—are consistently applied throughout the year. Boliden's mineral resources are presented without including mineral reserves, leading to a clearer interpretation of available resources.
Regulatory Compliance
Adhering to the standards set by the Swedish Mining Association and PERC, Boliden ensures that all documentation is extensively reviewed. Competent persons are tasked with validating the reported information, upholding a high level of integrity and transparency in their operations. This summary, reflecting the outstanding efforts of Boliden, is backed by Sofia Höglund, the head of Mineral Resources and Project Evaluation.
Frequently Asked Questions
What is the significance of Boliden's increase in mineral resources?
The increase signifies operational success and potential for future growth, reflecting effective exploration and favorable market conditions.
How has Aitik contributed to Boliden’s mineral resources?
Aitik has contributed significantly with a marked increase in mineral resources alongside ongoing mining activities, ensuring a stable production output.
What changes were made regarding mineral resource reporting?
Boliden has implemented a new methodology excluding mineral reserves from mineral resource figures, leading to clearer representation and reporting.
Who validates the mineral resources reported by Boliden?
Competent persons are tasked with validating and approving all documentation concerning mineral resources, ensuring compliance with regulatory standards.
What recent developments occurred in the Boliden Area?
In the Boliden Area, mineral reserves surged by 2.0 Mtonnes, bolstered by contributions from all operational mines as well as effective exploration efforts.
