Structural evolution of the accretional continental margin of the Paleoproterozoic Svecofennian orogen in southern Sweden

A new tectonic model for the Palaeoproterozoic Kautokeino Greenstone Belt, northern Norway, based on high-resolution airborne magnetic data and field structural analysis and implications for mineral potential

“…The Palaeoproterozoic Svecofennian orogeny (c. 1.9-1.7 Ga) was the most important tectonic event to affect the northern Fennoscandian Shield and was also the last major ductile event to penetratively shape the present-day structural grain of the exposed units (Koistinen et al, 2001). The Palaeoproterozoic deformation is interpreted to result from the accretion of island arc fragments possibly during several orogenic events (e.g., Marker, 1985, Nironen, 1997Beunk & Page, 2001;Korja et al, 2006;Lahtinen et al, 2008;Angvik, 2014). The individual fragments accreted on to the western margin of the Archaean craton and consist of island arc and subduction-related basinal metasupracrustal rocks.…”

Biotite and muscovite 40Ar–39Ar geochronological constraints on the post-Svecofennian tectonothermal evolution, Forsmark site, central Sweden

“…Ages that are inferred to date the last phases of Svecofennian ductile deformation along these zones have been reported, especially from the time interval 1.82-1.78 Ga (e.g. Sjöström and Bergman 1998;Beunk and Page 2001;Högdahl et al 1995Högdahl 2000;Hermansson et al 2008a).…”

Cambrian sedimentary dykes in the Proterozoic basement of the Västervik area (southeast Sweden): episodic formation inferred from macro- and microfabrics

“…1a). Beunk and Page (2001) proposed a back-arc environment for this crustal segment, which formed in response to Paleoproterozoic, northward-directed subduction beneath the Oskarshamn-Jönköping Belt (OJB; Fig. 1a), approximately 100 km to the south (Mansfeld et al 2005).…”

“…Their thicknesses range between 2 and 10 cm, and are rather constant throughout the outcrop Fig. 1 a Simplified geological map of South Sweden (modified after Beunk and Page 2001). Study area in (b) is marked.…”