| 11. | Samarskite occurs in rare earth bearing granite pegmatites with other rare minerals.
|
| 12. | It is a late-stage mineral in some complex granite pegmatites.
|
| 13. | The underlying material of granite and pegmatite is exposed at the summit.
|
| 14. | Highest ratios ( 10 or higher ) occur in pegmatites.
|
| 15. | It occurs as a secondary beryllium mineral in granitic and alkalic pegmatites.
|
| 16. | It is found as needle-like or prismatic crystals in pegmatite.
|
| 17. | Clarkeite forms by oxidation and replacement of uraninite late during pegmatite crystallization.
|
| 18. | These are commonly cut by late orogenic granites and pegmatites.
|
| 19. | Uranium minerals were derived from uraniferous pegmatites in the sediment source areas.
|
| 20. | The shaft into the uranium-bearing pegmatite reached a depth of.
|
