Journal ArticleDOI
Ionium determination in Deep-sea sediments
Edgardo Picciotto,S. Wilgain +1 more
TLDR
In this paper, Pettersson et al. developed a method for direct measurement of the ionium content in samples of sediment from the Swedish Deep-Sea Expedition (DSE).Abstract:
MEASUREMENTS carried out in the Oceanographical Institute, Goteborg, on the radium content in deep-sea cores by H. Pettersson, Traude Bernert, V. Kroll1 et al. showed the vertical distribution of radium to be highly complicated. We were therefore asked to develop a method for direct measurement of the ionium content in samples of sediment from the Swedish Deep-Sea Expedition.read more
Citations
More filters
Journal ArticleDOI
Distribution of the Elements in Some Major Units of the Earth's Crust
Karl K. Turekian,K. H. Wedepohl +1 more
TL;DR: A table of abundances of the elements in the various major units of the Earth's lithic crust with a documentation of the sources and a discussion of the choice of units and data is presented in this article.
Journal ArticleDOI
238U234U230Th232Th systematics and the precise measurement of time over the past 500,000 years
TL;DR: In this paper, the authors developed techniques to measure the abundance in corals by isotope dilution mass spectrometry and showed that 6 × 10^8 atoms of coral can be measured to ±30 ǫ (2σ) and 2 × 10 ǔ(10) atoms of corals to ± 2ǫ.
Journal ArticleDOI
Geochronological studies of deep sea sediments by the ionium/thorium method
Edward D. Goldberg,Minoru Koide +1 more
TL;DR: In this paper, a model for the mixing of the upper layers of the sediment, by worm-burrowing or near-bottom currents, is proposed and, if valid, allows the depth of mixing to be ascertained from the ionium/thorium profiles.
Journal ArticleDOI
Uranium-series Dating of Marine and Lacustrine Carbonates
TL;DR: The most widely used method for marine carbonates is 230Th dating, with 231Pa dating playing an increasingly important role as mentioned in this paper, which can be used to date materials as young as 3 years and in excess of 600,000 years.
Journal ArticleDOI
The geochemistry of thorium and uranium
References
More filters
Journal ArticleDOI
Vertical Distribution of Radium in Deep-Sea Sediments
TL;DR: In this paper, Pettersson et al. showed that the expected rise in radium content from moderate values in the uppermost surface layers to a maximum corresponding to a radioactive equilibrium between precipitated ionium and ionium-supported radium generally occurred; but the maximum was not followed by the theoretical exponential decline downwards governed by the rate of decay of ionium, to 50 per cent in 83,000 years, to 25 per cent of the radium, etc.
Journal ArticleDOI
Radioactivity of ocean sediments; Part 3, Radioactive relations in ocean water and bottom sediment; Part 4, The radium content of sediments of the Cayman Trough
C. S. Piggot,W. D. Urry +1 more
Journal ArticleDOI
Emploi de la dithizone pour séparer et purifier le radium d, le radium e et le polonium
TL;DR: In this paper, the conditions for formation of a dithizonate de polonium are determined, and the result is applique a la separation and a la purification des elements du depot actif du radium.
Journal ArticleDOI
Thorium in Sea Water and Marine Sediments
TL;DR: In this article, Thorium in Sea Water and Marine Sediments is discussed. Geologiska Foreningen i Stockholm Forhandlingar: Vol. 71, No. 2, pp 238-242.