The Skellefte District

: Bauer T, Skyttä P, Hermansson T, Dehghannejad M, Tavakoli S

: Weihed P

: 2015

: 3D, 4D and Predictive Modelling of Major Mineral Belts in Europe

: Mineral Resource Reviews

: 93

: 121

: 29

: 978-3-319-17428-0

: 2365-0559

DOI: https://doi.org/10.1007/978-3-319-17428-0_5

Four-dimensional geological modelling has been conducted in the Palaeoproterozoic

Skellefte mining district. 3D-modelling of volcanic-hosted

massive sulphide deposits and associated host-rocks has been carried out in

multiple scales from deposit to regional scale and is based on a combination

of geological and geophysical investigations. A conceptual model founded

on unravelling the structural control on sedimentation, volcanism and

mineralization and the subsequent deformation patterns, acts as a base for

geological modelling. The final 3D-model provides a structural framework

in which the mineralizations can be studied by improved understanding of

the structural evolution in the mine areas, and by comparing the regional

structural patterns versus the form and attitude of ore deposits. Additionally,

uncertainty and prospectivity models were constructed showing the

distribution of data and the potential of discovering new ore deposits.

Subsequent 4D-modelling adds the time aspect to the 3D-models and aims at

visualizing and understanding the geological history in the district and as a

support for ore targeting. Moreover, adding geological time to the modelling

helps gaining confidence about both the conceptual models and the 3Dmodels.

The final 3D- and 4D-models provide a regional three-dimensional

context for both industrial and academic activities in the Skellefte district,

and aid the understanding of large-scale tectonic processes.