Mikael VasilopoulosGeological Survey of Finland | GTK
Mikael Vasilopoulos
Doctor of Philosophy (PhD)
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11
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Publications (11)
In this study of the Hirvilavanmaa Au-only and the polymetallic (Au-Cu-Co-Ni) Naakenavaara orogenic gold deposits from the Central Lapland belt (CLB) we present precise U-Pb ages obtained by single collector LA-ICP-MS from hydrothermal monazite and xenotime associated with different stages of hydrothermal activity in the deposits. We also use cryst...
The Paleoproterozoic Central Lapland and Kuusamo belts of northern Finland host several examples of orogenic gold mineralization as is common for Precambrian greenstone belts in Finland and globally. Approximately half of known occurrences of orogenic gold in the Central Lapland belt and most of the occurrences in the Kuusamo belt are characterized...
The Hirvilavanmaa (Au-only) and Naakenavaara (Cu-Co-Au-Ni) deposits, located only 5 km apart in the Paleoproterozoic Central Lapland belt (CLB) in northern Finland, represent two types of orogenic gold mineralization that dominate the CLB: (1) Au-only and (2) Au with atypical metal association, respectively. In this study, we compare these deposits...
The Juomasuo Au–Co deposit, currently classified as an orogenic gold deposit with atypical metal association, is located in the Paleoproterozoic Kuusamo belt in northeastern Finland. The volcano-sedimentary sequence that hosts the deposit was intensely altered, deformed, and metamorphosed to greenschist facies during the 1.93–1.76 Ga Svecofennian o...
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 th...
Poster presentation of the hydrothermal alteration of the Juomasuo Au-Co deposit