The formation of siliciclastic sedimentary rocks during the Archean-Paleoproterozoic transition was governed by weathering processes under an oxygen-free atmosphere in tectonic settings linked very likely to hot and shallow subduction processes. The detritus contained in lowermost Paleoproterozoic sedimentary rocks should reflect the Archean evolution of its sources in general, and the Neoarchean evolution in particular. We report on a provenance study of Paleoproterozoic siliciclastic, partly volcanoclastic sandstones and greywackes, and the matrix of diamictites (2.5 to 1.9 Ga) from the Pechenga and Imandra-Varzuga greenstone belts of Fennoscandia based on a combination of single grain heavy mineral analysis, whole rock geochemistry, and U-Pb and Hf isotope systematics of detrital zircons. The rocks contain up to 40% pseudomatrix but still preserve a highly variable spectrum of stable and labile heavy minerals including rutile, zircon and tourmaline but also amphibole, garnet, titanite, spinel, pyroxene and epidote. Nb/Cr ratios in rutile indicate that minerals had been derived from mafic and predominantly felsic rocks. These data reflect the presence of mafic and evolved felsic lithologies in the source areas. Th/Sc ratios in strata deposited between 2.5 and 2 Ga are mostly between 0.1 and 0.6, typical of the sourcing (Neo)Archean crust. Detrital zircon ages range from 3.7 Ga to c. 1.9 Ga with most samples yielding a prominent population of Archean ages between 2.9 to 2.6 Ma. The youngest detrital zircon age populations from the glaciogenic Neverskrukk and Polisarka formations constrain the Huronian glaciation in Fennoscandia to ca. 2.41 Ma. The overlying Kolosjoki and Kuetsjärvi formations deposited between ca. 2.1 and 1.9 Ga have additional age distribution maxima between 2.1 and 1.9 Ga and give further evidence in support of syndepositional magmatism. Initial 𝛆Hf isotope values of Archean-aged zircons range between +7 and -12 and are mostly moderately juvenile to juvenile. Values decrease from juvenile to slightly negative εHf values with age, conforming to isotopic crustal evolution paths having originated at 3.3 and 3.0-2.9 Ga. HfTDM model ages range between 4.1 and 2.2 Ga with abundant model ages between 3.5 and 3.0 Ga. Initial 𝛆Hf values of Paleoproterozoic rocks deposited between 2.5 and 2.4 Ga are between +1 and -11, those at 2.0 Ga are between +6 and -10. Values form vertical arrays at 2.4 Ga and 2.0 Ga, potentially indicating significant crustal recycling of ca. 3.0 Ga and younger Archean crust. Our results constrain the provenance areas for the Archean detrital zircons in the lower Paleoproterozoic siliciclastic rocks of the Pechenga and Imandra-Varzuga greenstone belts of Fennoscandia to the surrounding cratonic domains like the Kola and Karelian provinces, as well as the Murmansk and Belomorian provinces. The zircon age distributions trace the assembly and dispersal of the Kenorland supercontinent, and probably also the Paleoproterozoic accretion of microcontinents to Fennoscandia. The mineralogically diverse detritus constituting the studied rocks and the detrital zircon age distributions attest to the presence of a (Neo)Archean mafic and evolved felsic upper crust having sourced the studied sedimentary rocks.