Table 1 Rock sample, experiment sample ID, research cruise, and description

KM18-08C #79 R01A

KM18-08C #79 R01A

KM18-08C

Higashi Ensei

Weakly altered pumiceous crust silicified with white silica minerals

1

KM18-08C #79 R01B

KM18-08C #79 R01B

\("\)

\("\)

Altered pumiceous crust silicified with white silica minerals

2

KM18-08C #79 R01C

KM18-08C #79 R01C

\("\)

\("\)

Altered pumiceous crust silicified with white silica minerals

3

KM18-08C #81 R01

KM18-08C #81 R01

\("\)

Ieyama

Inactive chimney mainly composed of Ba and sulfide minerals

4

KM18-08C #81 R02

KM18-08C #81 R02

\("\)

\("\)

Sulfide rock mainly composed of Sp and Gn with Py

5

KM18-08C #84 R04A

KM18-08C #84 R04A_3

\("\)

\("\)

Sulfide rock mainly composed of Py, Sp, Cp and Ba

6

\("\)

KM18-08C #84 R04A_4

\("\)

\("\)

\("\)

7

KM18-08C #84 R04B

KM18-08C #84 R04B_1

\("\)

\("\)

Sulfide rock mainly composed of Py, Sp, Cp and Ba

8

\("\)

KM18-08C #84 R04B_2

\("\)

\("\)

\("\)

9

\("\)

KM18-08C #84 R04B_3

\("\)

\("\)

\("\)

10

\("\)

KM18-08C #84 R04B_4

\("\)

\("\)

\("\)

11

\("\)

KM18-08C #84 R04B_5

\("\)

\("\)

\("\)

12

KM18-08C #85 R01

KM18-08C #85 R01_1

\("\)

Izena Caldron

Sulfide rock mainly composed of Py/Mar and Ba

13

\("\)

KM18-08C #85 R01_2

\("\)

\("\)

Active sulfide-sulfate chimney

14

YK16-12 6 K#1471 R01

YK16-12 6 K# 1471 R01_1-1

YK16-12

Western area of Kume

Rock mainly composed of Ba. Partially Sp, Ga, and Py

15

\("\)

YK16-12 6 K# 1471 R01_2-1

\("\)

\("\)

\("\)

16

\("\)

YK16-12 6 K# 1471 R01_2-2

\("\)

\("\)

\("\)

17

\("\)

YK16-12 6 K# 1471 R01_3-1

\("\)

\("\)

\("\)

18

\("\)

YK16-12 6 K# 1471 R01_3-2

\("\)

\("\)

\("\)

19

YK16-12 6 K#1471 R02

YK16-12 6 K# 1471 R02_1-1

\("\)

\("\)

Sulfide rock mainly composed of Cp, Py, and Sp

20

\("\)

YK16-12 6 K# 1471 R02_2-1

\("\)

\("\)

\("\)

21

\("\)

YK16-12 6 K# 1471 R02_3-1

\("\)

\("\)

\("\)

22

\("\)

YK16-12 6 K# 1471 R02_4-1

\("\)

\("\)

\("\)

23