| Abstract: | A gas-source mass spectrometer has been constructed for the precise measurement of lead isotope ratios. Sixteen analyses on 4 different preparations of the same galena made over a period of 2 months gave 95% confidence limits (per analysis) of 206Pb/204Pb = 0.080%, 207Pb/206Pb = 0.042% and208Pb/206Pb = 0.046%. Eight samples from the U.S. mine in the Bingham district have a linear relationship over the 1% range of their 206Pb/204Pb ratios. The simplest model fitting these data suggests that the lead was separated from a primary system (??=8.98) 1630??150 m.y. ago and subsequently mixed with a radiogenic lead of similar age; biotite K-Ar dates for altered intrusive rocks associated with the ores provide an apparent age of mineralization and suggest that isotopic evolution of the lead was terminated about 36 m.y. ago. ?? 1967. |
| Genre: | Article |
| ProdID: | 70010564 |
| Citation Author: | Stacey, J. S.; Moore, W. J.; Rubright, R. D. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 499 |
| Citation Issue: | 5 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Earth and Planetary Science Letters |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 11 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Precision measurement of lead isotopes ratios: preliminary analyses from the U.S. mine, Bingham Canyon, Utah; 1967; Article; Journal; Earth and Planetary Science Letters; Stacey, J. S.; Moore, W. J.; Rubright, R. D. |
| Citation Start Page: | 489 |
| Citation Volume: | 2 |
| Citation Year: | 1967 |
| Type: | citation/reference |
| Text: | Precision measurement of lead isotopes ratios: preliminary analyses from the U.S. mine, Bingham Canyon, Utah; 1967; Article; Journal; Earth and Planetary Science Letters; Stacey, J. S.; Moore, W. J.; Rubright, R. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1967 00:00 -0600 |
| Publisher: | |
