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Progress Report on Geologic Studies of the Ranger Orebodies, Northern Territory, Australia: Usgs Open-File Report 82-936 (en Inglés)
J. T. Nash
(Autor)
·
David Frishman
(Autor)
·
Bibliogov
· Tapa Blanda
Progress Report on Geologic Studies of the Ranger Orebodies, Northern Territory, Australia: Usgs Open-File Report 82-936 (en Inglés) - Nash, J. T. ; Frishman, David
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Origen: Estados Unidos
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Reseña del libro "Progress Report on Geologic Studies of the Ranger Orebodies, Northern Territory, Australia: Usgs Open-File Report 82-936 (en Inglés)"
The Ranger No. 1 and No. 3 orebodies contain about 124,000 tonnes U3O8 in highly chloritized metasediments of the lower Proterozoic Cahill Formation within about 500 m of the projected sub-Kombolgie Formation unconformity. In both orebodies, oxidized and reduced uranium minerals occur chiefly in quartzose schists that have highly variable amounts of muscovite, sericite, and chlorite. The effects of several periods of alteration are pervasive in the vicinity of orebodies where biotite and garnet are altered to chlorite, and feldspars to white mica or chlorite. Oxidized uranium minerals, associated with earthy iron oxides, occur from the surface to a depth of about 60 m. Below the oxidized zone, uranium occurs chiefly as uraninite and pitchblende disseminated through thick sections of quartz-chlorite-muscovite schist and has no apparent association with graphite or sulfides. In fact, graphite is rare and sulfides are generally low in abundance (
