Table 1 Concentrations of acid-volatile sulfide (AVS), Fe and Zn in the unfiltered and 0.2-μm filtered samples collected at hydrothermal vents of the Eastern Lau Spreading Center (June 2005).

Kilo Moana

KM-154-2

Diffuse flow near mussel bed

12.3

7.0

52.3

16

16

15

< 0.3

< 0.3

KM-155-2

Black smoker

178

3.7

2710

1430

1430

1400

90

< 0.3

KM-155-3

Black smoker

252

5.8

148

202

202

280

13

< 0.3

KM-156-1

Black smoker

258

4.6

2230

1570

1570

1560

22

< 0.3

KM-156-3

Black smoker

314

3.6

2250

1580

1580

1480

85

< 0.3

KM-164-2

Black smoker

301

5.2

1190

852

852

780

12

< 0.3

Tow Cam

TC-157-1

Black smoker

325

4.1

3990

234

234

230

33

< 0.3

TC-157-2

Black smoker

310

4.3

N/A

230

230

230

43

< 0.3

TC-159-1

Diffuse Flow

35

6.6

89.3

5.6

5.6

2.5

< 0.3

< 0.3

TC-159-2

Diffuse Flow

35

6.5

172

5.9

5.9

5.6

< 0.3

< 0.3

ABE

ABE-160-1

Clear fluid from a broken spire

153

5.6

359

27.6

27.6

33

< 0.3

< 0.3

ABE-160-2

Black smoker

295

4.2

1370

235

235

240

39

< 0.3

ABE-160-3

Black smoker

310

4.2

1540

158

158

180

42

< 0.3

ABE-160-4

Black smoker

305

4.4

1570

149

149

150

36

< 0.3

Tu'i Malila

TM-161-1

Focused diffuse flow, clear

45

6.1

161

1.1

1.1

0.80

< 0.3

< 0.3

TM-161-2

Clear vent fluid

295

4.2

760

124

124

130

42

1.5

TM-161-3

Focused diffuse flow, clear

45

6.2

148

2.3

2.3

1.9

< 0.3

< 0.3

TM-161-4

Clear vent fluid

267

4.5

804

165

165

163

20

0.5