Radium and lead-210 in marine barite

Borole, D. V. ; Somayajulu, B. L. K. (1977) Radium and lead-210 in marine barite Marine Chemistry, 5 (3). pp. 291-296. ISSN 0304-4203

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0304-4203(77)90022-6


Measurements of 226Ra and 210Pb in barite samples separated from different depths of a piston core from the eastern equatorial Pacific are reported. 226Ra is enriched in the barite as would be expected from the chemistries of Ra and Ba; the 226Ra/Ba ratio centers around 1.5·1014 atoms/mole. The results suggest that barite is concentrating Ra at a rate comparable to its decay rate, viz. 5.78·10−3 yr−1. The gross 210Pb depletion with respect to 226Ra is indicative of 222Rn loss due to the smallness of the barite crystals.

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