Absolute age of disseminated uraninite in Wheeler Basin, Grand County, Colorado

Journal Article · Wed Jan 01 04:00:00 EST 1975 · J. Res. U.S. Geol. Surv., v. 3, no. 6, pp. 747-751

OSTI ID:4038744

Ludwig, K R; Young, E J

Uranium and lead isotopic analyses of monazite and uraninite from the disseminated uraninite occurrence at Wheeler Basin, Grand County, Colo., indicate that these minerals formed 1,446 +- 20 m.y. ago. This time correlates well with intrusion of the Silver Plume Granite. The uraninite and monazite were also affected by a later disturbance at 880 +- 130 m.y., but show essentially no effects of subsequent events. This secondary disturbance may have been due to intrusion of dikes related to the Pikes Peak batholith, dated at 1,041 +- 13 m.y. ago. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-33-025966
• OSTI ID: 4038744
• Journal Information: J. Res. U.S. Geol. Surv., v. 3, no. 6, pp. 747-751, Journal Name: J. Res. U.S. Geol. Surv., v. 3, no. 6, pp. 747-751; ISSN JRGSA
• Country of Publication: United States
• Language: English

Related Subjects

*URANINITES-- ISOTOPE DATING
050100* --Nuclear Fuels--Reserves
COLORADO
GEOLOGY
ISOTOPE RATIO
MONAZITES
N44100* --Environmental & Earth Sciences--Minerals & Ores
URANIUM