Constraining provenance for the uraniferous Paleoproterozoic Francevillian Group sediments (Gabon) with detrital zircon geochronology and geochemistry

Frantz Ossa Ossa,Axel Hofmann,Christophe Ballouard,Clarisa Voster,Ronny Schoenberg,Alina Fiedrich,Francis Mayaga-Mikolo,Andrey Bekker

Precambrian Research（2020）

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摘要

•Archean granitoids sourced U for high-grade U deposits in the Francevillian Group.•Detrital zircon grains from Archean granitoids as tracers for sedimentary U deposits.•Archean granitoids of the Congo craton represent hybrid magmas with both mantle and crustal component.•Existence of a Paleoarchean proto-crust in the Congo craton.

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关键词

Uranium deposits,Oklo natural nuclear reactor,Francevillian Basin,Archean granitoids,Zircon U-Pb dating,Hf isotope analysis

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