Table 1 Geochemical data of deep hypersaline anoxic basin (DHAB) brines and typical seawater (modified from [13, 21])

Coordinates (N)

35°18.87

35°17.15

35°13.78

–

     (E)

21°24.34

21°42.31

21°28.94

–

Water depth (m)

3430

3582

3468

–

Density (10³ kg m⁻³)

1.23

1.35

1.13

1.03

Na⁺ (mM)

4674

68

3503

528

Cl⁻ (mM)

5289

9491

3729

616

Mg²⁺ (mM)

410

4995

316

60

K⁺ (mM)

369

20

122

11

SO₄ ²⁻ (mM)

397

96

107

32

HS⁻ (mM)

2.9

1

16

2.6 × 10⁻⁶

CH₄ (mM)

0.5

0.03

5.6

1.4 × 10⁻⁶