Radioactive disequilibrium in altered mid-oceanic basalts
Earth and Planetary Science Letters
By: M.P. Bacon
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Abstract
A young (<1 m.y.) tholeiitic basalt dredged from the Mid-Atlantic Ridge displays a234U excess and a230Th deficiency that have resulted from the addition of seawater uranium during weathering at seafloor temperatures. Two older samples, though they acquired substantial amounts of uranium from seawater, are depleted in234U, indicating preferential leaching of this isotope. Hydrothermally altered samples suggest that some uranium loss may have occurred. Possible isotopic effects of preferential234U leaching, however, are obscured by secondary addition of seawater uranium at lower temperatures.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Radioactive disequilibrium in altered mid-oceanic basalts |
| Series title | Earth and Planetary Science Letters |
| DOI | 10.1016/0012-821X(78)90200-5 |
| Volume | 39 |
| Issue | 2 |
| Year Published | 1978 |
| Language | English |
| Publisher | Elsevier |
| Description | 5 p. |
| First page | 250 |
| Last page | 254 |
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