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Abstract— The paper presents U–Pb zircon dates (SHRIMP-II) and isotopic-geochemical data (SIMS and Sm–Nd method) on detrital zircon and its sedimentary host rocks of the Daldyn Group at the Anabar… Click to show full abstract
Abstract— The paper presents U–Pb zircon dates (SHRIMP-II) and isotopic-geochemical data (SIMS and Sm–Nd method) on detrital zircon and its sedimentary host rocks of the Daldyn Group at the Anabar Shield. The rocks were metamorphosed to the granulite facies. The oldest Eoarchean (3.7 Ga) source of terrigenous material (determined based on single zircon grains) is confirmed by the Nd model age of the protolith: T Nd (DM) 2 = 3.69–3.71 Ga. The rocks are dominated by zircon dated at 3.5 Ga, which reflects that the area from which the terrigenous material was brought consisted mostly of Paleoarchean magmatic rocks.
Journal Title: Geochemistry International
Year Published: 2020
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