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472 International Journal of Earth Sciences (2021) 110:467–485 13 Table 1 Whole major and trace element data of Montemolín Formation (Late Ediacaran) Sample MO-01 MO-02 MO-03 MO-04 MO-05 MO-07 MO-08 MO-09 MO-10 MO-11 SiO 2 67 .00 66.57 66.36 67.10 63 .23 63.83 64.75 63.48 62.94 65.78 TiO 2 0.69 0.69 0.67 0.68 0.80 0.74 0.73 0.84 0.86 0.79 Al 2 O 3 15.45 14.99 15.70 14.93 16.88 16.72 15.68 15.74 16.15 15.28 Fe 2 O 3( T ) 4.90 4.98 4.90 4.76 6.16 6.03 5.57 6.62 6.77 6.23 MnO 0.07 0.07 0.09 0.08 0.06 0.08 0.08 0.07 0.06 0.07 MgO 2.08 2.00 2.01 1.90 2.43 2.59 2.52 2.89 2.94 2.71 CaO 2.47 2.41 1.88 2.27 1.17 1.83 2.07 1.90 1.68 1.61 Na 2 O 3.78 3.70 2.73 3.27 2.04 3.10 3.73 3.67 3.39 3.40 K 2 O 2.21 2.10 2.94 2.24 4.20 3.36 2.51 2.84 2.96 2.47 P 2 O 5 0.17 0.18 0.18 0.18 0.21 0.17 0.19 0.18 0.18 0.19 LOI 1.01 0.94 1.47 1.28 2.75 1.51 1.35 1.57 2.03 1.80 Total 99.83 98.63 98.94 98.68 99.92 99.96 99.19 99.80 99.96 100.33 PIA 67.93 67.84 73.46 69.61 79.80 73.05 69.43 69.84 72.23 71.89 CIA 59.45 59.48 62.15 60.67 63.17 60.58 59.15 58.21 59.55 59.99 SiO 2 /Al 2 O 3 4.34 4.44 4.23 4.49 3.75 3.82 4.13 4.03 3.90 4.30 K 2 O/Na 2 O 0.58 0.57 1.08 0.69 2.06 1.08 0.67 0.77 0.87 0.73 Al 2 O 3 /Na 2 O 4.09 4.05 5.75 4.57 8.27 5.39 4.20 4.29 4.76 4.49 Al 2 O 3 /TiO 2 22.49 21.82 23.33 22.12 21.23 22.53 21.42 18.78 18.82 19.27 Ba 754 578 1009 876 1420 822 522 762 825 713 Rb 77 75 80 70 108 106 87 94 89 77 Sr 377 420 267 322 174 232 271 320 256 243 Nb 8.50 8.80 7.70 8.40 10.80 10.20 9.50 10.50 12.00 10.20 Hf 4.80 5.50 4.10 5.00 4.50 4.30 3.50 4.60 4.90 4.70 Zr 221 233 180 229 187 180 149 191 203 195 Y 21.70 22.00 21.50 21.00 23.40 23.10 22.50 23.00 25.60 23.50 Pb 24 21 18 24 18 20 22 15 18 20 Th 8.13 9.20 7.33 9.24 8.33 7.94 6.40 7.68 8.88 7.72 U 1.78 1.73 1.84 1.87 1.70 1.66 1.79 1.71 2.05 1.73 Cr 80 80 80 80 90 90 90 100 100 90 Ni 30 30 40 30 50 40 40 50 60 50 Co 14 14 16 14 16 17 15 21 23 24 V 91 89 111 89 120 106 105 118 123 114 Sc 11 11 12 11 16 14 13 15 16 15 Ga 19 17 19 18 21 20 20 20 23 20 Ti 4119 4119 4035 4047 4766 4448 4388 5024 5144 4754 Th/Nb 0.96 1.05 0.95 1.10 0.77 0.78 0.67 0.73 0.74 0.76 Th/Sc 0.74 0.84 0.61 0.84 0.52 0.57 0.49 0.51 0.56 0.51 La/Th 4.26 4.40 4.52 3.97 3.75 4.38 4.55 4.17 4.39 4.51 Zr/Sc 20.09 21.18 15 .00 20.82 11.69 12.86 11 .46 12.73 12.69 13.00 Ti/Zr 18.64 17.68 22.41 17.67 25.49 24.71 29.45 26.30 25.34 24.38 La 34.6 40.5 33.1 36.7 31.2 34.8 29.1 32 39 34.8 Ce 69.2 72.1 72.1 70.3 57.5 66 56.7 64.5 78.1 71.1 Pr 7.63 8.91 7.56 8.09 7.28 7.73 6.75 7.35 8.72 8.01 Nd 27.8 31.6 27.5 28.8 27.1 28.6 25.6 27 32.1 29 Sm 5.31 5.74 5.07 5.37 5.47 5.55 5.12 5.38 6.11 5.47 Eu 1.34 1.4 1.26 1.32 1.29 1.32 1.28 1.31 1.46 1.31 Gd 4.23 4.61 4.29 4.2 4.53 4.57 4.26 4.36 4.84 4.6 Tb 0.67 0.66 0.65 0.65 0.71 0.68 0.7 0.68 0.74 0.73 Dy 3.93 4.08 3.79 3.56 4.13 4.09 3.95 3.98 4.37 4.19 Ho 0.73 0.77 0.72 0.7 0.8 0.77 0.74 0.75 0.87 0.81 Er 2.1 2.15 2.12 2.09 2.38 2.23 2.16 2.2 2.5 2.27 &KDSWHU