Table 1 Results of XRF analysis of examined concretions.

From: Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis

  Teshio Yatsuo Morozaki
Concretion matrix Concretion matrix Concretion matrix
1 2 3 4 5 6 7 8 9 10 11 12
SiO2 39.48 35.36 35.60 54.00 28.79 31.64 28.05 62.54 15.16 14.98 17.99 62.92
TiO2 0.31 0.26 0.26 0.45 0.25 0.29 0.24 0.92 0.13 0.13 0.15 0.51
Al2O3 9.41 8.90 8.95 12.77 6.68 7.43 6.46 17.79 3.54 3.48 4.15 12.83
Fe2O3 2.92 2.82 2.70 2.96 2.21 2.48 2.15 6.90 1.93 1.69 1.94 4.10
MnO 0.05 0.03 0.03 0.28 0.63 0.43 0.69 0.03 0.07 0.08 0.08 0.02
MgO 0.78 0.72 0.76 0.90 2.93 3.08 2.85 2.43 2.30 2.61 2.05 1.47
CaO 23.18 26.02 25.74 11.63 51.67 48.34 52.12 3.99 39.83 41.27 36.07 1.30
Na2O 2.16 1.92 1.94 2.36 0.70 0.81 0.69 1.86 0.79 0.78 0.95 3.14
K2O 1.42 1.33 1.37 2.40 0.67 0.80 0.64 1.79 0.41 0.36 0.55 0.08
P2O5 0.18 0.19 0.18 0.12 2.39 1.15 2.96 0.13 1.48 1.59 1.44 0.08
Ig.Loss(wt%) 18.58 20.89 20.75 9.32 32.34 30.63 31.51 12.12 33.70 31.84 34.26 6.26
Total (wt%) 98.44 98.40 98.25 97.17 96.91 97.07 96.45 98.38 98.85 98.3 99.13 95.63