The 2.31Ga mafic dykes in the Karelian Craton, eastern Fennoscandian shield: U–Pb age, source characteristics and implications for continental break-up processes

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

“…In the Tarim Craton, ca. 2.3 Ga magmatism from the Quanji massif is interpreted to have formed in a postcollisional extensional tectonic regime displaying a heterogeneous Nd-Hf isotopic compositions, while those from Heluositan Group are formed in continental rift with negative ε Nd(t) values (Zhang et al, 2007;Gong et al, 2014;He et al, 2018 (Tchameni et al, 2001;Manyeruke et al, 2004;Kullerud et al, 2006;French and Heaman, 2010;Kumar et al, 2012;Nilsson et al, 2013;Stepanova et al, 2015).…”

Geochronology of the Palaeoproterozoic Kautokeino Greenstone Belt, Finnmark, Norway: Tectonic implications in a Fennoscandia context

“…9A, B). Rare-earth (Balashov et al, 1993(Balashov et al, ), c. 2450 Ma plutons from the Belomorian Craton (Lobach-Zhuchenko et al, 1998), c. 2450-2428 Ma plutons from the Karelian Craton (Huhma et al, 1990;Amelin & Semenov, 1996;Perttunen & Vaasjoki, 2001;Hanski et al, 2001bHanski et al, ), c. 2450Hanski et al, -2410 Ma volcanic rocks from Vetreny Belt (Puchtel et al, 1996(Puchtel et al, , 1997(Puchtel et al, ), c. 2440 Onkamo Group volcanic rocks (Hanski & Huhma, 2005), c. 2403 Ma Ringvassøy dykes (Kullerud et al, 2006(Kullerud et al, ), c. 2504(Kullerud et al, , 2450(Kullerud et al, , 2310(Kullerud et al, and 2140 Ma dykes in the Karelian Craton (Amelin & Semenov, 1996;Mertanen et al, 2006;Stepanova et al, 2014Stepanova et al, , 2015, c. 2330 Ma Runkaus volcanic rocks in Peräpohja Schist Belt (Huhma et al, 1990), c. 2220 Ma Haaskalehto-type sills and dykes (Huhma et al, 1990;Hanski et al, 2010), 2137 ± 5 Ma amphibolite of Čáskejas Formation (deep pink; Krill et al, 1985) and davidite of the Bidjovagge deposit (pale pink; Bjørlykke et al, 1990) in the Kautokeino Greenstone Belt, c. 2090 Ma Jouttiaapa volcanic rocks in Peräpohja Schist Belt (Huhma et al, 1990(Huhma et al, ), c. 2085 Ma komatiites in the Karasjok Greenstone Belt (Henriksen, 1983;Krill et al, 1985), c. 2060 Ma Siilinjärvi volcanic rocks (Lahtinen et al, 2015b), c. 2060Ma Jeesiörova and Peuramaa komatiites in Savukoski Group in Central Lapland Greenstone Belt (Hanski et a...…”

Early Permian mafic dikes in the Nagqu area, central Tibet, China, associated with embryonic oceanic crust of the Meso‐Tethys Ocean

“…The long-term magmatic activity occurring from the latest Carboniferous to the Early Permian [Zhai et al, 2013;Liao et al, 2015;W. Xu et al, 2015] indicates the presence of a relatively stable extensional tectonic environment that could be considered as a delayed continental breakup period; similar failed continental breakup processes also occurred on the Karelian Craton in the eastern Fennoscandian shield, based on a study of a Paleoproterozoic mafic dikes swarm in this region [Stepanova et al, 2015].…”