Region/country

²²⁶Ra(range)

²³²Th(range)

⁴⁰K(range)

Reference

Beach Sands

Safaga, Egypt

25.3 (10 - 64)

21.4 (9 - 37.4)

618 (421 - 969)

[13]

West coast, Thailand

12.96 (2.7 - 23.95)

19.06 (3 - 31.2)

273.53 (10.7 - 654.3)

[12]

East Coast, Thailand

11.13 (3.2 - 18.6)

18.83 (5.1 - 34.5)

414.33 (182.4 - 559.7)

[12]

Patong Beach, Phuket, Thailand

8.9 (0 - 67.8)

42.4 (0 - 335.3)

963.1 (0 - 4330.9)

[18]

Chalatat and Samila Beach Songkhal, Thailand

41.4 (0 - 210.8)

63.8 (0 - 318.8)

247.8 (89.2 - 963.4)

[19]

Northeast coast of Tamilnadu, India

35.12

713.6

349.6

[20]

Red Sea coast, Egypt

21.1

11.6

930

[21]

Australia

3.7

40

44.4

[22]

Brazil

14.3

18

807

[23]

Mediterranean coast, Turkey

12.2

9.0

157.7

[24]

Black Sea coast, Turkey

4.41 - 14.04

2.62 - 16.55

11.60 - 513.32

[25]

Algiers Bay, Algeria

15.8

19.5

374

[26]

Bay of Algeciras, Spain

12.1

15

188

[27]

South East Coast, Brazil

5 - 4043

7 - 55537

25 - 888

[28]

Preta beach, Brazil

54 - 180

128 - 349

47 - 283

[11]

Dois Rios beach, Brazil

6 - 78

12 - 87

269 - 527

[11]

Hongkong

24.3

27.1

841

[29]

Xiamen Island, China

14.6 (7.9 - 25.7)

10.9 (6.7 - 41.4)

396.4 (197.4 - 487.6)

[15]

Rizhao, China

12.0 (7.6 - 17.2)

15.2 (7.8 - 25.1)

1079.2 (883.4 - 1313.6)

[30]

World

35

30

400

[17]

Marine Sands (China)

Liaodong Bay

26.5 (14.7 - 36.1)

41.8 (25.3 - 56.8)

696.9 (405.8 - 919.4)

Present study

North Yellow Sea

17.5 (7.2 - 66.3)

39.4 (15.7 - 175.4)

857.1 (635 - 1044)

Zhoushan Area

19.5 (15.0 - 24.0)

36.6 (33.0 - 40.0)

728.1 (665.0 - 836.0)

Taiwan shoal

20.7 (5.6 - 39.9)

26.3 (6.5 - 53.1)

458.8 (176.0 - 658.8)

Pearl river mouth

13.8 (9.4 - 20.0)

13.5 (9.0 - 22.0)

245.7 (152.0 - 319.0)