Sulphide trace element, sulphur isotope and hydrothermal alteration studies in the Juomasuo and Hangaslampi Au-Co deposits, Kuusamo belt, northeastern Finland

Vasilopoulos, Mikael; Ranta, Jukka-Pekka; Molnár, Ferenc; O´Brien, Hugh; Lahaye, Yann (2019-08-27)
 
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https://www.dropbox.com/s/h4ytqkelp0tu7om/eVolume%204.pdf?dl=0

Vasilopoulos, Mikael
Ranta, Jukka-Pekka
Molnár, Ferenc
O´Brien, Hugh
Lahaye, Yann
Society for Geology Applied to Mineral Deposits
27.08.2019

Vasilopoulos, Mikael; Ranta, Jukka-Pekka; Molnár, Ferenc; O’Brien, Hugh; Lahaye, Yann (2019) Sulphide trace element, sulphur isotope and hydrothermal alteration studies in the Juomasuo and Hangaslampi Au-Co deposits, Kuusamo belt, northeastern Finland. In : Proceedings of the 15th SGA Biennial Meeting, Vol 4. 27-30 August 2019, Glasgow, Scotland, pp. 1700-1703. https://www.dropbox.com/s/h4ytqkelp0tu7om/eVolume%204.pdf?dl=0

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Abstract

The Juomasuo and Hangaslampi Au-Co deposits are hosted by the Paleoproterozoic Kuusamo belt in northeastern Finland. Sulphur isotope and trace element data from sulphides indicate that the geochemically distinct, Au-Co and Co-only enrichments were formed from fluids of different origin. Accordingly, sericite alteration is typical in the zones of the Au-Co enrichment, whereas the chlorite-biotite-amphibole alteration occurs in relation to the Co-only mineralization. Variation in the composition of host rocks does not seem to have a strong control on the type of mineralization.

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