Uranium in pegmatites

The mineral composition of gummite

“…The occurrence of uraninite in pegmatites has been discussed by Page (1950) andQuensel (1940 Terdonck (1933, 1935), Bain (1950), and Kohl (1954), and scattered remarks are found in the literature descriptive of individual species 0 The above sequence, recognized in the literature, is confirmed by the examination of Museum specimens, Uraninite deposits rich in sulfides generally alter directly to the sulfates zippeite, uranopilite 9…”

“…Gummite pseudomorphs after uraninite crystals show a very characteristic sequence of alteration products that has long been recognized^ Brief descriptions have been given by Kerr (1877), Genth (1879), Hidden (I88j_., Von Foulion (1883), Hoffman (1901, Tipper (1919), Schoep (1921), Buttgenbach (1922), Hacquaert (1927Hacquaert ( ), ^llsworth (1930, Ross, Henderson andPosnjak (1931), lagoda (1946), Sarkar and Sen (1946), Krishnan (1948), Bakken, Gleditsch and Pappas (1948), and Page (1950) is common at the surface of pegmatites in the Gaya district, India, and passes into pure uraninite in depth (where a nodule 36 pounds in weight was found). This also is true in the New -England pegmatites.…”

Geology of uranium deposits in the Front Range, Colorado

“…The largest and those most likely to be of economic importance in the future are simple pegmatites that contain disseminated uraninite in a quartz-feldspar-biotite matrix (Sims and others, 1963). Although many zoned pegmatites in the Front Range are known to contain uraninite and rare-earth minerals (Page, 1950), the uranium minerals are sparse and are in such small bodies that they are unlikely to be recovered except possibly as a byproduct.…”

The Geological Survey's work on the geology of uranium and thorium deposits

“…Some pegmatites in South Dakota and in the southeastern states were examined during the early years of the program. In addition, information about uranium and thorium minerals in a vast number of pegmatites was accumulated in the course of the Geological Survey's strategic minerals investigations for mica and beryl during World War II (Page, 1950) 0…”