The Soil Ecosystem
Sampling Distribution
Periodic Classification of the Elements
Key Elements for Plant Nutrition
Elements and Compounds
Radioactivity and Nuclear Equations
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Updated: Jan 21, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
1National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.
Soil samples near the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) were analyzed for uranium, thorium, and rare earth elements (REEs). Results indicate REE concentrations are not linked to the FDNPP accident but likely stem from local geology.
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