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Table 3 Th/K and Th/U ratio of core samples for well (A and D)

From: Determination of clay minerals using gamma ray spectroscopy for the Zubair Formation in Southern Iraq

Well Units K% U ppm Th ppm Th/U U/K Th/K
A North H3 0.01 0.29 2.95 10.03 29.4 295
H2 0.03 0.08 0.57 7.55 2.53 19.13
H1 0.01 0.11 0.66 6.17 10.7 66
D South H3 0.11 0.11 1.98 17.32 1.04 17.95
H2 0.07 0.19 1.85 9.69 2.73 26.43
H1 0.12 0.1 1.09 10.43 0.87 9.04