The Metmnict Character Shown by Much of the Allanite In
C-294 GEOLOGICAL SURVEY RESEARCH 1961 The metmnict character shown by much of the ~Ioore, G. E., Jr., 1959. Bedrock geology of the Carolina and Quonochontaug quadrangles, Rhode Island: U.S. Geol. allanite in the Pikes Peak granite is probably entirely Survey Geol. Qtiad. ~Iap GQ-117. unrelated to the bastnaesite alteration, which may be Olson, J. C., Shawe, D. R .. Pray, L. C., and Sharp, W. N., 1954, assumed to have been completed at a time when the Rare earth mineral deposits of the )Iountain Pass District, allanite was entirely crystalline. Supergene alteration, San .Bernardino County, California: U.S. Geol. Surrey on the other hand, would be accelerated by metamict Prof. Paper 261. 75 p. ization through radiochemical effects and by the phys Silver, L. T., and Grunenfelder, ~Iarc, 1957, Alteration of accessory allanite in granites of the Elberton area, ical disruption of the allanite and the enclosing rock. Georgia: Geol. Soc. America Bull., v. 68, p. 1796. Smith, -n·. L., and Cisney, E. A., 1956. Bastnaesite, an accessory REFERENCES mineral in the Redstone granite from Westerly, Rhode Glass, J. J., and Smalley, R. G., 1!Hri, Bastniisite [Gallinas ~Its., Island: Am. ::\lineralogist, v. 41, p. 76-81. N. )lex.] ; Am. ~Iineralogist, v. 30, p. 601-615. Sverdrup, T. L., Bryn, K. 0., and Saebo, P. C., 1959, Bastnasite Hutchinson, R. ~l.. 1960. Strueture and petrology of north end a new mineral for Norway.: Norsk geol. tidsskr., v. 39, p. of Pikes Peak batholith, Colorado in Guide to the geology 237-247. of Colorado: Geol. Soc. America. Rocky Mtn.
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