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  1. Background Radiation

    Linked via "Thorium-232 ($\text{Th}-232$)"

    Terrestrial Radiogenic Sources
    Terrestrial background radiation originates from naturally occurring radioactive isotopes found within the Earth's crust and mantle. The primary contributors are isotopes belonging to the heavy element decay chains, specifically Uranium-238 ($\text{U}-238$) and Thorium-232 ($\text{Th}-232$).
    The decay of $\text{U}-238$ leads to the production of Radon gas ($\text{Rn}-222$), an [alpha emitte…

  2. Subsurface Geological Environment

    Linked via "Thorium-232"

    Thermal Regime and Geothermal Gradients
    Temperature within the SGE increases with depth due to the decay of long-lived radioactive isotopes (primarily Potassium-40, Uranium-238, and Thorium-232) within the crust and mantle, generating the Geothermal Flux.
    | Crustal Province | Average Gradient ($^\circ \text{C/km}$) | Dominant Heat Source | Notes on Thermal Behavior |