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. 2024 Apr 3;10(8):e29120. doi: 10.1016/j.heliyon.2024.e29120

Table 2.

Major element concentrations of the Pisha Sandstone (wt%) from Ermaying, Heshanggou and Liujiagou Formation.

Sample No. Ermaying
 Heshanggou
 Liujiagou
sand
stone
 sand
stone
 sand
stone
 sand
stone
 sand
stone
 mud
stone
 sand
stone
 mud
stone
 sand
stone
 sand
stone
 silt
stone
 silt
stone
 silt
stone
 sand
stone
 sand
stone
Emy1 Emy2 Emy3 Emy4 Emy5 Emy6 Emy7 Emy8 Emy9 Emy10 Hsg1 Hsg2 Hsg3 Ljg1 Ljg2
SiO2 62.68 72.69 45.42 73.02 77.48 62.01 61.56 60.33 40.52 52.71 59.53 57.38 56.49 68.59 73.28
TiO2 0.44 0.36 0.51 0.25 0.42 0.87 0.59 0.63 0.09 0.18 0.61 0.88 0.63 0.21 0.29
Al2O3 12.96 11.15 11.71 6.21 9.55 16.65 13.60 15.57 6.67 9.76 15.08 15.91 14.84 6.69 8.10
TFe2O3 2.15 1.32 4.90 0.66 1.70 5.29 2.68 3.62 0.82 0.92 5.88 9.00 5.96 2.15 0.98
MnO 0.08 0.07 0.25 0.31 0.04 0.02 0.09 0.06 0.12 0.12 0.08 0.04 0.07 0.05 0.05
MgO 1.91 1.13 2.14 0.67 1.46 2.68 1.96 3.61 0.58 0.92 3.84 2.97 3.73 0.83 0.97
CaO 5.92 3.15 14.52 7.98 1.61 1.23 5.79 2.12 26.32 17.02 1.49 1.33 3.73 9.42 5.86
Na2O 2.27 1.99 0.13 0.13 0.14 0.10 2.30 1.61 1.52 2.05 1.35 0.12 1.40 0.16 0.19
K2O 2.95 3.16 1.92 1.61 1.60 2.19 3.19 2.93 2.17 3.06 2.60 2.44 2.65 2.04 2.58
P2O5 0.05 0.09 0.11 0.03 0.08 0.10 0.18 0.18 0.04 0.04 0.03 0.11 0.19 0.06 0.04
LOI 8.56 4.76 18.29 9.02 5.87 8.86 7.98 9.27 21.16 14.26 9.54 9.78 10.28 9.83 7.63
Total 99.97 99.86 99.92 99.89 99.95 100.02 99.93 99.93 100.01 101.04 100.04 99.95 99.98 100.03 99.97
CIA 54.87 52.81 82.35 74.14 81.31 85.96 55.23 64.75 47.54 49.26 67.47 83.94 66.46 71.11 70.38
CIW 63.44 63.04 96.46 93.58 95.36 97.98 64.24 74.58 57.08 59.13 77.21 97.51 76.27 92.89 92.99
PIA 56.67 54.16 95.72 91.30 94.40 97.65 57.27 70.03 46.30 48.88 73.37 97.03 72.16 89.75 89.67
ICV 1.21 1.00 2.06 1.82 0.72 0.74 1.21 0.93 4.72 2.47 1.05 1.05 1.22 2.21 1.34
Al2O3/SiO2 0.21 0.15 0.26 0.09 0.12 0.27 0.22 0.26 0.16 0.19 0.25 0.28 0.26 0.10 0.11
K2O/Na2O 1.30 1.59 14.70 12.42 11.33 21.01 1.39 1.81 1.42 1.49 1.93 19.76 1.89 13.09 13.92
Al2O3/TiO2 29.26 31.24 22.77 24.76 22.59 19.06 23.00 24.77 71.78 54.57 24.70 18.00 23.49 31.55 27.49
SiO2/Al2O3 4.84 6.52 3.88 11.76 8.11 3.72 4.53 3.87 6.07 5.40 3.95 3.61 3.81 10.25 9.05

All the calculated values were based on major-element data which were recalculated to LOI-free basis and adjusted to 100 %.