Table 3 The range and average value of Al content, Ti content, TOC, δ13C value and δ18O carb value and related parameters.

From: Paleoenvironmental reconstruction of the Middle Ordovician Majiagou Formation in the northeastern Ordos Basin and its effect on organic matter enrichment

 

Al (%)

Ti (%)

CIA

C value

TOC (%)

δ13Ccarb (‰)

δ18Ocarb (‰)

Ma 5(20)

0.03–12.3

0.04–0.77

60–78.34

0.001–0.23

0.007–0.29

 − 4.7 to  − 0.6

 − 10 to  − 8.3

Ma 5avg

1.40

0.08

73.39

–

0.12

 − 1.78

 − 9

Ma 4(13)

0.05–0.25

–

50–63.16

–

0.13–0.2

 − 0.5 to 0.1

 − 7.8 to  − 6.8

Ma 4avg

0.13

–

56.77

–

0.16

 − 0.12

 − 7.3

Ma 3(12)

0.02–2.43

0.01–0.14

46.03–62.01

0.002 to 0.03

0.1–0.39

 − 2.6 to 0

 − 7.6 to  − 5

Ma 3avg

0.98

0.04

51.68

–

0.20

 − 0.73

 − 5.53

Ma 1(17)

0.15–9.16

0.01–0.47

37.18–64.15

0.02 to 0.3

0.11–0.63

 − 8.3 to  − 4.7

 − 6.6 to  − 4.5

Ma 1avg

5.87

0.28

58.33

–

0.24

 − 6.38

 − 5.49

  1. The value in brackets is the number of samples, and this line of data represents the range from the minimum value to the maximum value; The avg represents the average value; the symbol ' – ' indicates that the content is less than 0.01.
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