Lithological Rock Units

Geologic Age

Radio-elements

Min

Max

Mean

Standard

Deviation

(CV %)

Lafia-Wukari FM

Maastrichtian

K (%)

-0.10

0.50

0.20

0.10

50.00

-0.10

4.30

0.60

0.50

83.33

-0.10

0.90

0.30

0.20

66.67

0.10

0.70

0.30

0.10

33.33

-0.00

1.10

0.30

0.20

66.67

eTh (ppm)

4.90

19.6

10.3

4.00

38.83

11.6

26.1

17.4

2.60

14.94

4.00

25.8

12.3

5.90

47.97

9.50

27.1

18.0

3.50

19.44

4.10

25.5

11.4

5.70

50.00

eU (ppm)

0.30

8.00

3.30

1.60

48.48

2.40

9.10

5.10

1.30

25.49

1.00

8.70

4.00

2.20

55.00

1.40

10.1

5.20

1.50

28.85

0.90

9.80

3.70

2.20

59.46

Nkporo FM

Campanian

K (%)

-0.00

0.40

0.20

0.10

50.00

0.10

0.70

0.30

0.10

33.33

-0.10

0.70

0.30

0.20

66.67

-0.00

0.60

0.20

0.10

50.00

0.00

0.50

0.20

0.10

50.00

eTh (ppm)

4.90

16.2

12.3

2.60

21.14

7.10

22.8

17.0

2.70

15.88

4.60

24.0

13.7

5.10

37.23

3.00

26.0

12.9

6.70

51.94

6.30

26.1

18.8

3.70

19.68

eU (ppm)

1.00

7.00

5.70

1.10

19.30

2.00

9.60

5.50

1.30

23.64

-0.60

9.30

4.10

2.20

53.66

0.70

10.1

4.10

2.50

60.98

1.60

10.4

6.40

1.70

26.56

Agwu FM

Coniacian-Turonian

K (%)

-0.10

0.90

0.30

0.20

66.67

0.00

0.70

0.30

0.10

33.33

0.10

0.90

0.30

0.10

33.33

0.00

0.60

0.30

0.10

33.33

0.10

0.70

0.30

0.10

33.33

eTh (ppm)

2.40

28.0

13.0

4.40

33.85

6.60

25.4

14.8

3.60

24.32

1.10

21.1

13.8

3.60

26.09

10.0

22.1

15.7

2.20

14.01

12.0

28.5

16.9

2.90

15.38

eU (ppm)

0.30

8.50

3.90

1.50

38.46

1.70

9.50

4.40

1.30

29.55

-0.10

5.50

3.60

1.00

27.78

2.70

8.20

4.80

1.10

22.92

2.90

8.50

4.90

1.10

22.45

Eze-Aku G. (Esh)

Cenomanian

K (%)

0.10

2.20

1.00

0.50

50.00

0.10

1.80

0.70

0.30

42.86

0.30

3.00

1.20

0.70

58.33

0.20

1.60

0.70

0.30

42.86

0.20

1.50

0.80

0.30

37.50

eTh (ppm)

8.20

21.2

13.5

3.60

26.67

5.70

28.4

16.3

5.50

33.74

5.60

24.9

14.8

3.60

24.32

5.10

21.8

11.8

4.10

34.75

3.40

32.4

16.0

7.20

45.00

eU (ppm)

2.10

6.40

3.90

1.00

25.64

1.10

8.70

4.70

1.60

27.66

1.30

6.30

3.90

1.00

25.64

2.00

5.80

3.90

1.00

25.64

1.30

7.80

4.60

1.50

32.61

Eze-Aku G. (Ess)

Cenomanian

K (%)

0.10

0.90

0.30

0.20

66.67

0.10

2.10

0.80

0.50

62.50

0.10

1.00

0.50

0.20

40.00

0.00

1.70

0.80

0.40

50.00

0.00

1.70

0.30

0.20

66.67

eTh (ppm)

8.10

22.0

14.2

3.20

22.54

6.50

22.1

13.5

3.00

22.22

10.8

19.7

14.8

2.20

14.86

-0.80

23.4

13.8

5.70

41.30

8.80

38.8

18.3

4.20

22.95

eU (ppm)

1.80

7.50

4.10

0.90

21.95

1.60

6.70

3.70

1.00

27.30

2.80

5.60

4.00

0.50

12.50

-0.80

6.40

3.20

1.40

43.75

2.60

6.90

4.90

0.70

14.29

Bima Formation

Albian-Turonian

K (%)

0.10

0.40

0.20

0.10

50.00

-0.10

4.30

0.50

0.40

80.00

0.00

0.40

0.20

0.10

50.00

0.10

1.90

0.60

0.40

66.67

0.10

2.20

0.80

0.50

62.50

eTh (ppm)

14.7

32.3

20.4

5.20

25.49

9.20

26.9

16.2

2.90

17.90

3.20

19.4

15.4

2.40

15.58

4.80

19.8

14.1

3.50

24.82

7.30

18.1

11.6

2.70

23.28

eU (ppm)

4.80

10.0

6.50

1.30

20.00

2.00

8.40

4.60

1.00

21.74

0.50

6.80

4.50

1.10

24.44

2.10

5.50

3.80

0.70

18.42

2.10

4.50

3.40

0.60

17.65

Asu-River Group

Albian-Turonian

K (%)

0.10

1.30

0.40

0.20

50.00

0.00

1.80

0.60

0.40

66.67

0.20

3.30

1.30

0.80

61.54

0.10

1.70

0.80

0.40

50.00

0.40

3.20

1.20

0.60

50.00

eTh (ppm)

8.30

25.1

15.2

3.60

23.68

5.20

49.1

18.0

8.40

46.67

7.90

19.3

11.3

2.10

18.58

7.90

25.9

14.6

4.20

28.77

4.40

25.7

15.4

3.70

24.03

eU (ppm)

1.90

6.90

4.20

0.90

21.43

1.60

8.90

4.10

1.50

36.59

2.40

5.40

3.50

0.60

17.14

2.10

6.80

4.00

1.10

27.50

1.30

6.30

3.90

0.90

23.08