Table 2 Total acid digestion test results for solid samples from the Salt Lake Mahai (unit: µg/g).

Mud

(n = 13)

Average ± Std. dev

57.85 ± 14.14

38,933 ± 10,306.81

17,912.23 ± 3,861.6

37,084.92 ± 21,342.57

15,955.46 ± 25,287.85

Minimum

24

20,402

8,065

13,437

3,267

Maximum

87

63,365

22,866

94,294

96,204

Gypsum-bearing

mud(n = 3)

Average ± Std. dev

74.33 ± 2.89

39,176.67 ± 16,620.71

21,791 ± 5,283.63

55,073 ± 28,005.59

10,965 ± 7,709.05

Minimum

71

22,420

15,765

28,220

4,632

Maximum

76

55,658

25,630

84,104

19,549

Gypsum and

halite-bearing mud

(n = 2)

Average

62.5

29,731.5

14,273.5

48,506

53,945

Minimum

46

23,923

13,727

27,420

38,280

Maximum

79

35,540

14,820

69,592

69,610

Clay

(n = 2)

Average

85

73,980.5

25,719

64,033.5

20,603

Minimum

50

51,186

17,341

44,986

20,548

Maximum

120

96,775

34,097

83,081

20,658

Gypsum-bearing clay

(n = 14)

Average ± Std. dev

63.29 ± 11.08

51,771.64 ± 33,644.81

17,082.57 ± 3,951.14

51,234.5 ± 21,479.52

21,409.71 ± 15,056.71

Minimum

45

20,774

10,070

26,602

4,651

Maximum

81

154,750

22,995

87,680

52,398

Gypsum and

halite-bearing clay

(n = 3)

Average ± Std. dev

50 ± 19.7

74,342.33 ± 33,850.41

18,907.33 ± 5,503.73

36,737 ± 9,167.23

33,740 ± 15,087.99

Minimum

34

35,288

14,751

26,157

21,949

Maximum

72

95,255

25,149

42,320

50,743

Halite-bearing clay

(n = 6)

Average ± Std. dev

49 ± 10.83

57,338.33 ± 35,762.37

17,712.17 ± 3,583.57

32,925.33 ± 4,533.8

17,796.33 ± 11,094.69

Minimum

38

27,323

13,746

26,067

2,054

Maximum

64

120,872

23,412

38,812

36,121

Silt and

halite-bearing clay

(n = 5)

Average ± Std. dev

42.6 ± 21.52

95,340.8 ± 134,681.77

15,639.6 ± 7,410.29

35,785.8 ± 17,288.76

18,086.2 ± 7,791.46

Minimum

7

17,795

3,427

8,082

8,980

Maximum

62

333,840

22,457

54,056

28,501

Silty clay (n = 1)

–

61

44,653

16,692

52,623

26,149

Silt-bearing halite

(n = 21)

Average ± Std. dev

16.71 ± 25.12

312,217.81 ± 87,013.64

6,698.67 ± 6,484.96

12,946.38 ± 9,409.08

15,565.38 ± 10,977.39

Minimum

2

82,624

1,170

4,164

3,102

Maximum

117

413,280

28,650

37,888

34,695

Silty halite

(n = 5)

Average ± Std. dev

14.2 ± 11.65

262,838.6 ± 104,465.32

8,323.4 ± 7,685.21

14,935.4 ± 12,876.53

15,150.2 ± 6,963.47

Minimum

3

129,806

1,788

3,307

6,851

Maximum

27

354,140

16,722

29,273

24,333

Mud-bearing halite

(n = 1)

–

3

299,300

2,880

3,926

42,534

Halite-bearing silt

(n = 3)

Average ± Std. dev

35 ± 38.22

129,145 ± 71,394.58

9,498.67 ± 2,468.17

31,360.33 ± 29,663.39

18,983.67 ± 4,010.79

Minimum

10

76,450

6,998

9,541

14,445

Maximum

79

210,398

11,933

65,136

22,051

Halite-bearing

fine sand

(n = 2)

Average

25

92,675

12,312.5

24,779

21,625

Minimum

24

84,691

11,133

23,566

15,743

Maximum

26

100,659

13,492

25,992

27,507

Clay-bearing silt

(n = 5)

Average ± Std. dev

30.25 ± 19.78

156,439.75 ± 112,937.42

12,327.5 ± 7,596.78

22,572.25 ± 14,084.87

16,030.25 ± 7,018.52

Minimum

6

56,624

2,681

3,720

7,942

Maximum

50

343,260

19,120

35,819

23,299