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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)