Analysis points in Figure 5

C

O

Na

K

Si

Al

Ca

Mg

Mn

Fe

Zn

Pb

1

-

29.46

-

1.55

5.20

2.98

2.57

-

22.88

2.13

3.58

29.60

2

-

30.67

-

1.22

5.77

2.92

5.02

-

21.12

2.31

3.87

27.60

3

-

25.49

-

1.34

5.58

3.13

1.94

-

24.82

2.00

4.01

31.69

4

-

31.96

-

1.29

6.53

3.39

3.17

-

19.71

3.66

4.21

26.08

5

14.32

41.63

0.68

5.73

17.12

11.36

-

0.93

3.64

4.59

-

-