Contents of natural radioactive nuclides in soil in relation to their surface area

Journal Article · Fri Dec 10 00:00:00 EST 1982 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JB087iB13p10857· OSTI ID:6151999

Megumi, K; Oka, T; Yaskawa, K; Sakanoue, M

Concentrations of uranium series nuclides (/sup 238/U, /sup 226/Ra, /sup 210/Pb), thorium series nuclides (/sup 228/Ra, /sup 212/Bi), and potassium in soil of a granitic belt were examined in relation to their surface area of soil, clay mineral composition, and the SiO/sub 2/ and Fe contents. In soil which is less weathered and has a surface area of around 10 m/sup 2//g, the /sup 238/U, /sup 226/Ra, /sup 210/Pb, /sup 228/Ra, and /sup 40/K contents increase with an increase the SiO/sub 2/ content related to the elemental compositions of their parents rocks. In homologous soils resulting from progressive weathering, the /sup 238/U, /sup 226/Ra, /sup 210/Pb, and /sup 228/Ra contents are found to increase with increasing surface area. For an homologous soil which is free from the clay consisting of three-layer units, the /sup 40/K content decrease with increasing surface area. However, in an homologous soil which contains a clay consisting of three-layer units, the /sup 40/K content is not surface area dependent.

• Research Organization: Radiation Center of Osaka Prefecture, Shinke-cho, Sakai-shi, Osaka, Japan
• OSTI ID: 6151999
• Journal Information: J. Geophys. Res.; (United States), Vol. 87:B13
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
SOILS
RADIOISOTOPES
BISMUTH 212
CLAYS
IRON
LAYERS
LEAD 210
POTASSIUM
QUANTITY RATIO
RADIUM 226
RADIUM 228
SILICA
SOIL CHEMISTRY
URANIUM 238
WEATHERING
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALI METALS
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BISMUTH ISOTOPES
CHALCOGENIDES
CHEMISTRY
ELEMENTS
EVEN-EVEN NUCLEI
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
ISOTOPES
LEAD ISOTOPES
METALS
MINERALS
NUCLEI
ODD-ODD NUCLEI
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RADIUM ISOTOPES
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENTS
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
580400* - Geochemistry- (-1989)