Table 2 Iron, manganese, cobalt, nickel, chromium and magnesium in geological samples from the SEP

Serpentine soils (30)

14.0–52.1

2000–6350

70–406

1660–13,920

1000–12,380

2.5–26.4

XRF, This study (Additional file 1: Table S3)

Soils (6)

10.2–16.0 ^b

1450–2600 ^c

152–325

3240–7220

1400–3640

3.8–15.6 ^d

ICP-ES [31]

Soils (8)

 < 0.2–6.8 ^b

11–32 ^e

18–150 (339) ^f

24–230 (933, 1047, 2602, 6400)^f

25–658 (896, 1014, 1670)^f

2.1–31.2 g

AAS (Mg, Mn) and ICP-ES (Co, Cr, Fe, Ni) [65]

Fluvial sediments (NR)

5.6–6.8 ^b

560–920 ^c

34–70

 > 100

–

–

AAS [32]

Serpentinized peridotite rocks (19)

7.6–13.5

488–2340 ^c

91–198

1759–10,752

1870–3480

24.6–35.6

Bulk XRF, This study

Peridotite and ultramafic rocks (NR)

–

–

–

1993–2380

1931–2471

34–45

NR [1]

Diabase and basalt rocks (23)

8.9–15.1

130–250

23–37

15–106

30–368

5.0–8.1

XRF (majors) and LA-ICP-MS (traces) [2]