Geochronology and chemostratigraphy of the 2.47–1.96 Ga rift-related volcano-sedimentary succession in the Karasjok Greenstone Belt, northern Norway, and its regional correlation within the Fennoscandian Shield

•New geochronological data bracket the age of the volcano-sedimentary Karasjok Greenstone Belt between 2.47 Ga and 1.96 Ga.•The 2.47 Ga Vuomegielas Formation is the oldest unit in the Karasjok Greenstone Belt and were deposited in a intracratonic rift setting, likely as a part of the Matachewan (LIP) plume event.•The Gollebáiki Formation hosts mid-Jatulian (c. 2.22–2.15 Ga) mafic intrusions and tholeiitic basalts, corresponding to another rifting event in a shallow-marine environment on the Fennoscandian Shield.•The uppermost Báhkilvárre Formation contains flood basalts, komatiites, and andesitic lavas extruded at c. 1.98–1.96 Ga.•Carbon isotope data for marine carbonates of the Skuvanvárri and Gollebáiki formations are elevated with δ13C values from + 3.7 to + 12.4 ‰, indicating their deposition during the c. 2.22–2.06 Ga Lomagundi Carbon Isotope Excursion. New geochronological data for the amphibolite-facies volcano-sedimentary Karasjok Greenstone Belt in northwestern Fennoscandia bracket its age between 2.47 and 1.96 Ga. The volcano-sedimentary units were deposited on the 3005 ± 24 to 2776 ± 69 Ma crystalline basement rocks of the Jergul Gneiss Complex. The lowermost Vuomegielas Formation contains rhyodacites dated at 2469 ± 12 Ma that were deposited in an intracratonic rift setting related to the Matachewan mantle plume event. The overlying Skuvanvárri Formation, correlative with the early Jatulian (c. 2.2 Ga) units on the Fennoscandian Shield, consists of siliciclastic sedimentary rocks deposited in coastal deltaic and shallow-marine settings. The overlying mid-Jatulian Gollebáiki Formation contains 2151 ± 5 Ma mafic intrusions and tholeiitic basalts related to a rifting event and breakup of the Superia supercraton that resulted in voluminous volcanic and shallow-marine deposits. The Ni-Cu-PGE-mineralized Porsvann intrusion, hosted by the Gollebáiki Formation, yielded an age of 2056 ± 10 Ma, which corresponds with other Ni-Cu-PGE-bearing intrusions on the Fennoscandian Shield. The uppermost Báhkilvárre Formation consists of basalts, komatiites, and andesitic lavas. A synvolcanic gabbro within the komatiites in the lower part of the formation yielded an age of 1984 ± 16 Ma. Andesites in the upper part of the same formation were dated at 1961 ± 1 Ma. They represent the final Paleoproterozoic magmatic event that affected large areas of the Fennoscandian Shield prior to the Lapland-Kola and Svecofennian orogenies. Carbon isotope values for carbonates of