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The Aricheng Basement-Hosted Albitite-Type Uranium Deposit, Roraima Basin, Co-Operative Republic Of Guyana, South America., Jim A. Renaud
The Aricheng Basement-Hosted Albitite-Type Uranium Deposit, Roraima Basin, Co-Operative Republic Of Guyana, South America., Jim A. Renaud
Electronic Thesis and Dissertation Repository
The Kurupung batholith is situated in a west dipping mylonite zone within theTransamazonian-aged Mazaruni granite greenstone terrane. Mylonitic shearing is a result of regional sinistral strike-slip faulting during the post-collisional stage of the Transamazonian orogenic cycle. Deformation was active between 2103 +/- 3 Ma, the age of the batholith, and 1995 +/- 15 Ma, the age of hydrothermal uranium and zircon mineralization. Mineral chemical and geochemical characterization of the batholith identifies a uranium-enriched low-Ti sanukitoid generated by partial melting of slab metasomatized mantle which retained unresorbed Cr-bearing mantle inclusions. Rapid unroofing to greenschist facies conditions at approximately 2094 +/- 5 …