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Table 5 Results of groundmass textural analysis

From: Eruption style transition during the 2017–2018 eruptive activity at the Shinmoedake volcano, Kirishima, Japan: surface phenomena and eruptive products

Type

Sample name

Area no

Conditions in 2D analyses

3D Crystal form

Number density

CSD y-axis intercept

CSD slope

   

Reference area (mm2)

Count

S:I:L

2D (mm−2)

3D (mm−3)

ln(N0) (mm−4)

 

P1

SNM18_15

2

0.0105

137

1:5:5

13,048

2121100

21.9

− 227.7

  

4

0.0102

135

1:6.7:6.7

13,235

1336140

22.5

− 260.1

  

6

0.0121

233

1:6.7:6.7

19,256

2180160

22.7

− 233.4

P1

SNM18030708-1

5

0.0118

189

1:10:10

16,017

5089880

22.0

− 152.1

  

6

0.0118

200

1:6.7:6.7

16,949

1955230

22.6

− 238.6

  

7

0.0108

181

1:3.3:3.3

16,759

644400

22.7

− 366.6

  

8

0.0116

187

1:6.7:6.7

16,121

175380

21.4

− 331.1

P2

SNM18_16

2

0.0078

94

1:2.5:2.5

12,051

152860

22.6

− 467.7

  

3

0.0081

104

1:2.2:2.2

12,840

77,610

23.3

− 668.5

  

6

0.0087

111

1:2:2

12,759

134940

23.1

− 658.3

B

SNM190305-1–2

2

0.0144

97

1:4:4

6736

574780

21.1

− 240.9

B

SNM190305-2–3

4

0.0144

93

1:2.9:2.9

6458

186470

21.1

− 305.6

  

5

0.0144

86

1:6.7:6.7

5972

853700

20.8

− 178.8

  

6

0.0144

99

1:2.5:2.5

6875

122140

21.3

− 332.1

L

SNM19_17

2

0.0144

152

1:2.5:2.5

10,556

349000

21.9

− 366.5

  

4

0.0144

180

1:6.7:6.7

12,500

1792490

21.5

− 167.1

  

6

0.0144

195

1:2.5:2.5

13,542

258300

22.4

− 423.3

L

SNM190420A-1E

3

0.0144

126

1:2.5:2.5

8750

191380

21.4

− 322.1

  

4

0.0144

159

1:4:4

11,042

586090

21.6

− 248.7

L

SNM19051302-2–22

2

0.0144

139

1:5:5

9653

1566960

21.4

− 227.3