Age, geochemistry, and origin of the mid-Proterozoic Häme mafic dyke swarm, southern Finland

• Published in: Bulletin of the Geological Society of Finland
• Main Authors: Luttinen, Arto, Lehtonen, Elina, Bohm, Katja, Lindholm, Tanja Marjukka, Söderlund, Ulf, Salminen, Johanna
• Other Authors: Earth Sciences Unit, Geochemistry and Petrology, Department of Geosciences and Geography, Biological stations, Helsinki University Library
• Format: Article in Journal/Newspaper
• Language: English
• Published: Geological Society of Finland 2022
• Subjects: Geosciences; ID-TIMS; geochronology; rapakivi magmatism; mafic dyke; mid-Proterozoic; Fennoscandia; Other natural sciences; Physical sciences; Ecology; evolutionary biology; Environmental sciences; Häme
• Online Access: http://hdl.handle.net/10138/344801

We have reappraised the age and composition of the mid-Proterozoic Häme dyke swarm in southern Finland. The dominant trend of the dykes of this swarm is NW to WNW. Petrographic observations and geochemical data indicate uniform, tholeiitic low- Mg parental magmas for all of the dykes. Nevertheless,...