O

Mg

Al

Si

Ca

Cr

①_Merwinite

52.22

7.84

0.42

16.66

22.77

0.09

②_Melilite

53.37

3.22

6.90

15.21

21.20

0

③_Larnite

52.08

3.89

1.20

16.83

25.9

0.10

④_Cr-spinel

53.12

15.71

7.15

0.26

0.49

23.27

⑤_Al-spinel

50.95

15.31

24.02

1.32

1.13

7.27