Investigation of vanadium bearing mafic intrusions in the Ljusdal lithotectonic unit

Vanadium and titanium are both critical raw materials according to the latest EU assessment and the purpose of the project is to produce geological and geophysical information from mafic intrusions in Gävleborg County with respect to mainly vanadium, but also titanium and iron.

The physical properties of the specific rocks, the content of metals and minerals and how and when these were formed, are being investigated.

The project is part of SGU's geological mapping plan for 2021–2027.

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The bedrock of the Ljusdal lithotectonic unit is dominated by the Ljusdal batholith (1.87–1.84 billion years old), which mainly consists of gneisses and deformed rocks with granitic to granodioritic compositions. Additionally, in the Ljusdal lithotectonic unit, mafic intrusions containing iron-titanium-vanadium mineralisations occur, including in the Sumåssjön–Dellen–Ljusdal-Järvsö area, which constitutes a so-called metallogenetic area for this type of mineralisation (fig. 1). In magmatic iron-titanium-vanadium mineralisations, also called orthomagmatic or mafic iron-titanium-vanadium mineralisations, vanadium is often concentrated in the mineral magnetite. Globally, this type of mineralisation is the most important primary source of vanadium.

Project Timeline

The project started in 2022 and will be completed in the first half of 2025. Geological, lithogeochemical, and geophysical data collected during the project are continuously published in SGU's databases. Preliminary results were published in an interim report in 2023, and a final report will be released in 2025.

Here you can access the interim report (in Swedish)