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).

					AVS, μM		Fe, μM		Zn, μM
Station	Sample ID	Sample Site Description	Temp. °C	pH	unfiltered	filtered	unfiltered	filtered	unfiltered	filtered
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