Paleoproterozoic Metamorphism of the Archean Tuntsa Suite, Northern Fennoscandian Shield

• Published in: Minerals
• Main Authors: Pentti Hölttä, Tiia Kivisaari, Hannu Huhma, Gavyn Rollinson, Matti Kurhila, Alan R. Butcher
• Format: Text
• Language: English
• Published: Multidisciplinary Digital Publishing Institute 2020
• Subjects: Archean; Paleoproterozoic; metamorphism; age determination; Fennoscandian Shield; Finland; Tuntsa; Fennoscandian; Lapland
• Online Access: https://doi.org/10.3390/min10111034

The Tuntsa Suite is a polymetamorphic Archean complex mainly consisting of metasedimentary gneisses. At least two strong metamorphic events can be distinguished in the area. The first took place at high temperatures in the Neoarchean at around 2.70–2.64 Ga, indicated by migmatisation and U-Pb ages o...