Table 2 Major element compositions (%) of the sandstones determined by XRF

From: Crystallization characteristic of sandstone under capillary salt weathering test using different salt property and temperature

Sample

SiO2

Al2O3

CaO

TFe2O3

K2O

Na2O

MgO

MnO

P2O5

SO3

TiO2

LOI

NS

76.06

7.57

4.62

1.63

1.55

1.39

0.72

-

0.07

0.08

0.46

4.62

GS*

74.63

8.54

5.25

1.90

1.82

1.68

0.90

0.05

0.07

0.02

0.35

5.43

  1. “-” means the concentration below the detection limit 0.01%. GS* was a fresh sandstone sample in the Nankan Grotto44.
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