Anomalous Uranium-Lead Ages

Journal Article · Sat Jan 01 04:00:00 EST 1955 · Geological Society of America, Bulletin

DOI:https://doi.org/10.1130/0016-7606(1955)66[767:AUA]2.0.CO;2· OSTI ID:4805324

KULP, J. L.; ECKELMANN, W. R.

The ages from the isotopic ratios Pb²⁰⁶U²³⁸, Pb²⁰⁷U² and Pb²⁰⁷/Pb²⁰⁶ do not agree with each other for a large fraction of the minerals studied. Many of these anomalous ages cannot be explained by radon leakage or errors in lead isotopic composition, and one possible cause may be removal of Pb from U minerals during recrystallization. Analysis of age data for several specimens of pitchblende and Pb minerals from the Lake Athabasca U district indicates that the true age is 1900 plus or minus 40 million years and that there must have been more than one period of Pb removal. it is concluded that detailed study of the U and Pb isotopic content of a district can be used to evaluate the times of deposition and Pb removal. (D.L.C.)

• Research Organization: Originating Research Org. not identified
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-029193
• OSTI ID: 4805324
• Journal Information: Geological Society of America, Bulletin, Journal Name: Geological Society of America, Bulletin Journal Issue: 6 Vol. 66; ISSN 0016-7606
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AGE ESTIMATION
DISTRIBUTION
ERRORS
GEOLOGY, MINERALOGY, AND METEOROLOGY
LEAD
LEAD 206
LEAD 207
LEAD ISOTOPES
LOSSES
MINERALS
QUANTITY RATIO
RADON
RECRYSTALLIZATION
STANDARDS
URANINITES
URANIUM 235
URANIUM 238
URANIUM ISOTOPES
VARIATIONS