 | | Journal (issue) | | 1650-1850 m.y. Age-Group . VII. The Witwatersrand Uraninite . . VIII. Minerals of the 2000-2 300 m. y. Age-group...obtained from measurements of the unit cell of uraninite are recorded after the ages determined by other...Lower Cretaceous. 3. Samarskite, Bejarafara, Madagascar-(chemicaI analysis 16 ) uncorrected age: 255...(Lower Cambrian) is known from Madagascar and East Africa. l. Uraninite, Bemasoandro,Nladagascar-(lead...adopted age 480 ± 15 m.-y. 2. Thorianite, Soafia, Madagascar-(lead method, complete 18 ) adopted age: 480 |  | | Book | | ... ... .... . .... ..... . . ...... . Zoned Uraninite Pegmatites ..................................... . Zr-Fe 3.......... . 5. Anions Examples Uraninite Pyrochlorc-microlite, apatite, zirkelite, crandalJite...cro]j te Uraninite, zircon Uraninite Uraninite, fergusonite, samarskite, xenotime Uraninite Urau.inite...always well crystallized. Metamict pitchblende ( uraninite) has been reported ( Conybeare and Ferguson, 1950)...conspicuous in pegmatites around such species as uraninite, euxenite, samarskite, fergusonite, betafite, |
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