Parameter Amount Units Ref [U]Crust Earth 2.70E-06 kg/kg 10 [232Th] Crust Earth 9.60E-06 kg/kg 10 [40K] Crust Earth 2.51E-06 kg/kg 10,11 [U]Crust Moon = [ 232Th] CM[U]CE/[ 232Th] CE 1.97E-07 kg/kg F8 [232Th] Crust Moon 7.00E-07 kg/kg 12,13 [40K] Crust Moon = [ 232Th] CM[ 40K] CE/[ 232Th] CE 1.83E-07 kg/kg F8 [U]Mantle Earth 3.30E-08 kg/kg 7 [232Th] Mantle Earth 1.32E-07 kg/kg 7 [40K] Mantle Earth 3.96E-08 kg/kg 7 [U]Mantle Moon = [U]CM[U]ME/[U]CE 2.41E-09 kg/kg F7 [232Th] Mantle Moon = [U]MM[ 232Th] ME/UME 9.63E-09 kg/kg F11 [40K] Mantle Moon = [U]MM[K]ME/UME 2.89E-09 kg/kg F12 MCrust Moon(U) = MCM[U]CM 1.26E+15 kg B20,F7 MCrust Moon( 232Th) = MCM[ 232Th] CM 4.48E+15 kg B20,F8 MCrust Moon( 40K) = MC[ 40K] C 1.17E+15 kg B20,F9 MMantle Moon(U) = MM[U]M 1.59E+14 kg B21,F13 MMantle Moon( 232Th) = MM[ 232Th] M 6.37E+14 kg B21,F14 MMantle Moon( 40K) = MM[ 40K] M 1.91E+14 kg B21,F15 MTotal(U) = MC(U) + MM(U) 1.42E+15 kg MTotal( 232Th) = MC( 232Th) + MM( 232Th) 5.11E+15 kg MTotal( 40K) = MC( 40K) + MM( 40K) 1.36E+15 kg [235U]/[U] 0.72% kg/kg 6 MTotal( 235U) = MT(U)[ 235U]/[U] 1.02E+13 kg Table 3 - Current Radioisotope Inventories STERNBERG Craters and cracks 2023 ICC 31
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