University of Oulu

Outokumpu-type deposits

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Author: Kuutila, Janne1
Organizations: 1University of Oulu, Faculty of Technology, Oulu Mining School, Degree Programme in Geosciences
Format: ebook
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.6 MB)
Pages: 28
Persistent link:
Language: English
Published: Oulu : J. Kuutila, 2022
Publish Date: 2022-04-21
Thesis type: Bachelor's thesis


Outokumpu-type deposits contain Cu-Co-Zn-Ni-Ag-Au. The first deposit of this type was found in the village of Kuusjärvi, North Karelia. The deposits are associated with ophiolites and enclosed in what is called Outokumpu assemblage. Similar deposits have been found around the world, but the Outokumpu area has the most and largest mineralizations to be found to date. There are numerous mineralizations found in the Outokumpu area. The Keretti, Vuonos, Luikonlahti and Kylylahti deposits having been mined and are the most significant ones. The current view is that the deposits have formed in a three-phase process. First deposition of hydrothermal sulphides at ultramafic ocean floor forming Cu proto-ore, then during obduction alteration of peridotite body margins forming Ni proto-ore. Final phase happened during regional deformation which remobilized the Cu and Ni proto-ores forming the current Outokumpu type deposits.

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Copyright information: © Janne Kuutila, 2022. Except otherwise noted, the reuse of this document is authorised under a Creative Commons Attribution 4.0 International (CC-BY 4.0) licence ( This means that reuse is allowed provided appropriate credit is given and any changes are indicated. For any use or reproduction of elements that are not owned by the author(s), permission may need to be directly from the respective right holders.