Table 1 Average chemical composition of pseudotachylyte matrix, and volume fraction and average aspect ratio of unmelted grains

0.09

0.26

0.26

0.26

0.13

0.18

0.12

1.58

1.56

1.55

1.54

1.39

1.5

1.41

11

6

13

5

13

8

10

52.55 ± 0.85

51.80 ± 1.50

52.79 ± 0.31

51.65 ± 1.24

53.40 ± 0.92

53.05 ± 0.66

52.46 ± 1.13

0.27 ± 0.08

0.16 ± 0.11

0.08 ± 0.01

0.13 ± 0.03

0.14 ± 0.07

0.29 ± 0.05

0.21 ± 0.02

30.22 ± 0.65

27.88 ± 1.15

27.97 ± 0.00

27.03 ± 0.58

29.25 ± 0.80

29.03 ± 0.37

28.92 ± 0.36

2.55 ± 0.48

4.68 ± 1.88

3.72 ± 0.12

5.32 ± 0.39

2.40 ± 0.49

2.32 ± 0.09

2.28 ± 0.11

0.21 ± 0.29

0.16 ± 0.04

0.13 ± 0.01

0.19 ± 0.02

0.03 ± 0.02

0.05 ± 0.02

0.02 ± 0.01

1.63 ± 0.08

1.96 ± 0.29

1.60 ± 0.08

2.15 ± 0.15

2.51 ± 0.14

2.52 ± 0.14

2.51 ± 0.05

0.55 ± 0.08

0.66 ± 0.10

0.94 ± 0.49

0.57 ± 0.02

0.45 ± 0.40

0.33 ± 0.04

0.42 ± 0.33

0.13 ± 0.02

0.13 ± 0.01

0.11 ± 0.03

0.15 ± 0.01

0.06 ± 0.02

0.06 ± 0.01

0.06 ± 0.01

7.82 ± 0.35

6.92 ± 0.51

6.97 ± 0.08

6.88 ± 0.14

6.90 ± 0.81

8.38 ± 0.52

8.23 ± 0.19

95.93

94.34

94.30

94.11

95.15

96.04

95.12

4.07

5.66

5.7

5.89

4.85

3.96

4.88