Magmatic Signature in Submarine Hydrothermal Fluids Vented Offshore Ventotene and Zannone Islands (Pontine Archipelago, Central Italy)

Table 2

Chemical analyses of the water samples. Concentrations in mg/l. Local seawater composition is reported for comparison.

Sample ID	Site	Depth (m)	Type	Sampling method	T (°C)	pH	EC (mS/cm)	Li	Na	K	Mg	Ca	F	Cl	Br	SO4	HCO3
2	Z1	50	Water column	Niskin	14.5	8.19	45.95	bdl	12189	453	1439	471	bdl	22036	bdl	3118	171
5	Z1	134	Water column	Niskin	14.4	8.04	45.86	bdl	12488	484	1492	503	bdl	21775	bdl	3032	189
9	Z2	127	Water column	Niskin	14.4	8.19	45.84	bdl	12471	486	1487	489	bdl	21874	bdl	2865	189
13	ZDA	120	Water column	Niskin	14.3	8.22	45.78	bdl	12189	476	1454	482	bdl	21904	bdl	2950	171
14	ZDA	147	Water column	Niskin	14.3	8.19	45.78	bdl	12482	481	1479	492	bdl	21977	bdl	2964	171
15	Z2	124	Thermal waters	ROV	60	n.a.	n.a.	bdl	12234	457	1443	465	bdl	22705	bdl	3165	n.a.
16	ZDA	145	Thermal waters	ROV	56	n.a.	n.a.	bdl	12210	450	1438	476	bdl	22302	bdl	3121	n.a.
	Seawater					8.15		0.17	10468	348	1331	411	1.3	18952	65	2648	135

n.a. = not analyzed. bdl = below detection limits (detection limits for ; ; ).