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Table 3 Rare earth element (REE) concentrations (ppb) of Wudaoliang stromatolites and reference samples

From: Palaeoenvironmental setting of lacustrine stromatolites in the Miocene Wudaoliang Group, northern Tibetan Plateau

Sample

La

Ce

Pr

Nd

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

ΣREE

ΣLREE

ΣHREE

WDL-10-C-1

658

1480

155

600

124

27

128

18

117

26

82

11

84

13

3523

3044

479

WDL-10-C-2

705

1407

145

561

124

27

118

17

106

22

70

10

70

10

3392

2969

423

WDL-13-D-1

1006

2790

242

904

196

39

176

23

148

30

86

12

82

12

5746

5177

569

WDL-13-D-2

1058

2180

236

907

173

44

171

24

145

28

83

13

83

13

5158

4598

560

WDL-13-A

1214

2003

267

1015

211

58

212

30

184

37

107

15

107

17

5477

4768

709

WDL-Carbonate

16,670

29,400

3920

14,730

3250

1270

3090

630

2130

400

1280

180

1230

160

78,340

69,240

9100

WDL-Shale

32,950

60,590

8070

29,140

5810

1220

5530

1080

3800

730

2400

360

2460

330

154,470

137,780

16,690

Erbisberg travertine

1680

3050

368

1820

320

75

297

39

243

46

138

19

134

20

8249

7313

936

Wallerstein carbonate

481

1130

136

590

145

41

166

24

153

33

97

15

98

16

3125

2523

602

Banza aragonite

1962

3182

613

2722

684

240

759

110

626

137

379

–

306

45

11,765

9403

2362

GRF stromatolite

318

780

88

343

71

17

69

11

68

15

42

–

42

6

1870

1617

253

  1. Note: WDL-13-A denoted the mean values of elemental concentration from 120 different point-ablation measurements in one stromatolite sample; WDL-Carbonate and WDL-Shale were referred to the averaging composition of carbonate and shale/mudstone in the Wudaoliang Group, data from Yi et al. (2008); Erbisberg hot-spring travertine (Erb 1) and Wallerstein spring mound carbonate (Wa 98/8) were from Arp et al. (2013); Banza sub-lacustrine hydrothermal-origin aragonite (TGR21-I 1) was from Barrat et al. (2000); GRF stromatolite meant the lacustrine freshwater stromatolite from Green River Formation studied by Bolhar and Van Kranendonk (2007)