Kleint, Charlotte; Hawkes, Jeffrey A; Sander, Sylvia G; Koschinsky, Andrea (2016): Geochemical characterization and the voltammetric investigation of hydrothermal Iron speciation of samples gained during SONNE cruise SO229. PANGAEA, https://doi.org/10.1594/PANGAEA.867265, Supplement to: Kleint, C et al. (2016): Voltammetric investigation of hydrothermal iron speciation. Frontiers in Marine Science, 3, 11 pp, https://doi.org/10.3389/fmars.2016.00075
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Abstract:
Hydrothermal vent fluids are highly enriched in iron (Fe) compared to ambient seawater, and organic ligands may play a role in facilitating the transport of some hydrothermal Fe into the open ocean. This is important since Fe is a limiting micronutrient for primary production in large parts of the world's surface ocean. We have investigated the concentration and speciation of Fe in several vent fluid and plume samples from the Nifonea vent field, Coriolis Troughs, New Hebrides Island Arc, South Pacific Ocean using competitive ligand exchange-adsorptive cathodic stripping voltammetry (CLE-AdCSV) with salicylaldoxime (SA) as the artificial ligand. Our results for total dissolved Fe (dFe) in the buoyant hydrothermal plume samples showed concentrations up to 3.86 µM dFe with only a small fraction between 1.1 and 11.8% being chemically labile. Iron binding ligand concentrations ([L]) were found in µM level with strong conditional stability constants up to logKFeL,Fe3+ of 22.9. Within the non-buoyant hydrothermal plume above the Nifonea vent field, up to 84.7% of the available Fe is chemically labile and [L] concentrations up to 97 nM were measured. [L] was consistently in excess of Felab, indicating that all available Fe is being complexed, which in combination with high Felab values in the non-buoyant plume, signifies that a high fraction of hydrothermal dFe is potentially being transported away from the plume into the surrounding waters, contributing to the global oceanic Fe budget.
Coverage:
Median Latitude: -17.831499 * Median Longitude: 169.278667 * South-bound Latitude: -18.130670 * West-bound Longitude: 168.402830 * North-bound Latitude: -16.688830 * East-bound Longitude: 169.519170
Date/Time Start: 2013-07-09T22:02:00 * Date/Time End: 2013-07-20T07:49:00
Minimum DEPTH, water: 400 m * Maximum DEPTH, water: 1873 m
Event(s):
SO229-19-1 * Latitude Start: -16.689500 * Longitude Start: 168.402830 * Latitude End: -16.688830 * Longitude End: 168.404670 * Date/Time Start: 2013-07-09T22:02:00 * Date/Time End: 2013-07-10T05:12:00 * Elevation Start: -339.8 m * Elevation End: -334.0 m * Location: Coral Sea * Campaign: SO229 (VANUATU) * Basis: Sonne * Method/Device: Remote operated vehicle (ROV)
SO229-27-1 * Latitude Start: -18.128330 * Longitude Start: 169.512000 * Latitude End: -18.130670 * Longitude End: 169.518670 * Date/Time Start: 2013-07-11T22:32:00 * Date/Time End: 2013-07-12T06:08:00 * Elevation Start: -1878.0 m * Elevation End: -1875.0 m * Location: Coral Sea * Campaign: SO229 (VANUATU) * Basis: Sonne * Method/Device: Remote operated vehicle (ROV)
SO229-30-1 * Latitude: -18.129330 * Longitude: 169.517170 * Date/Time: 2013-07-12T13:24:00 * Elevation: -1872.5 m * Location: Coral Sea * Campaign: SO229 (VANUATU) * Basis: Sonne * Method/Device: CTD/Rosette (CTD-RO) * Comment: rope length max: 1810m
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
197 data points
Data
1 Event | 2 Sample ID | 3 Samp type | 4 Device (Sampling device) | 5 Date/Time | 6 Latitude | 7 Longitude | 8 Elevation [m] | 9 Depth water [m] | 10 H2S [µmol/l] | 11 pH | 12 Eh [mV] | 13 Fe diss [nmol/l] | 14 Mn diss [nmol/l] | 15 FeL diss [nmol/l] (using dissolved iron) | 16 Std dev [±] (using dissolved iron) | 17 LogK FeL,Fe3+ | 18 Std dev [±] | 19 FeL diss [nmol/l] (using chemically labile iron) | 20 Std dev [±] (using chemically labile iron) | 21 LogK FeL,Fe3+ | 22 Std dev [±] | 23 Fe lab [nmol/l] | 24 Ratio [%] (Proportional chemically labil...) | 25 FeL xs [nmol/l] | 26 Ratio [%] (Proportional excess of iron-b...) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SO229-30-1 | 30 CTD 1500 | non-buoyant Plume | CTD | 2013-07-12T13:24 | -18.1293 | 169.5172 | -1872 | 1500 | 10 | 13 | 2 | 21.4 | 0.21 | 3.11 | 32.4 | 3.47 | 26.6 | ||||||||
SO229-30-1 | 30 CTD 1550 | non-buoyant Plume | CTD | 2013-07-12T13:24 | -18.1293 | 169.5172 | -1872 | 1550 | 28 | 36 | 5 | 21.6 | 0.37 | 6.81 | 24.9 | 9.24 | 25.7 | ||||||||
SO229-30-1 | 30 CTD 1600 | non-buoyant Plume | CTD | 2013-07-12T13:24 | -18.1293 | 169.5172 | -1872 | 1600 | 14 | ||||||||||||||||
SO229-30-1 | 30 CTD 1650 | non-buoyant Plume | CTD | 2013-07-12T13:24 | -18.1293 | 169.5172 | -1872 | 1650 | 30 | 97 | 8 | 19.7 | 0.06 | 25.50 | 84.7 | 67.30 | 69.4 | ||||||||
SO229-30-1 | 30 CTD 1700 | non-buoyant Plume | CTD | 2013-07-12T13:24 | -18.1293 | 169.5172 | -1872 | 1700 | 10 | 5.93 | 59.2 | ||||||||||||||
SO229-56-1 | 56 CTD 1600 | BG water sample | CTD | 2013-07-18T12:27 | -18.0333 | 169.3663 | -2839 | 1600 | 7 | 0.14 | 13 | 1 | 20.8 | 0.52 | 0.74 | 10.5 | 5.71 | 43.9 | |||||||
SO229-19-1 | 19 ROV 06 | Diffuse vent, vent outlet | KIPS | 2013-07-09T22:02 | -16.6895 | 168.4028 | -340 | <400 | 460 | 2.60 | 550 | 10 | 22.9 | 0.09 | 0.11 | 0.05 | 21.9 | 1.48 | 5.00 | 1.1 | 91.00 | 16.5 | |||
SO229-27-1 | 27 ROV 11 | Clear Smoker, buoyant plume | Niskin | 2013-07-11T22:32 | -18.1283 | 169.5120 | -1878 | 1860 | 20 | 7.2 | -233 | 820 | 0.20 | 1080 | 30 | 22.2 | 0.07 | 0.42 | 0.18 | 21.0 | 0.42 | 32.00 | 4.0 | 260.00 | 24.1 |
SO229-27-1 | 27 ROV 14 | Black smoker, vent outlet | KIPS | 2013-07-11T22:32 | -18.1283 | 169.5120 | -1878 | 1860 | 6200 | 3.3 | -267 | 379000 | 229.00 | ||||||||||||
SO229-27-1 | 27 ROV 15 | Black smoker, buoyant plume | Niskin | 2013-07-11T22:32 | -18.1283 | 169.5120 | -1878 | 1860 | 7.4 | -161 | 1680 | 0.80 | 2080 | 90 | 21.9 | 0.11 | 1.54 | 1.37 | 20.1 | 0.65 | 143.00 | 8.5 | 400.00 | 19.2 | |
SO229-27-1 | 27 ROV 16 | Black smoker, buoyant plume | Niskin | 2013-07-11T22:32 | -18.1283 | 169.5120 | -1878 | 1860 | 7.3 | -7 | 3860 | 1.70 | 3890 | 40 | 22.1 | 0.06 | 3.03 | 1.82 | 19.7 | 0.39 | 457.00 | 11.8 | 30.00 | 0.8 | |
SO229-60-1 | 60 ROV 01 | Clear Smoker, vent outlet | KIPS | 2013-07-19T00:33 | -18.1287 | 169.5182 | -1881 | 1873 | 7800 | 4.7 | -214 | 67000 | 164.00 | ||||||||||||
SO229-60-1 | 60 ROV 02 | Clear Smoker, buoyant plume | Niskin | 2013-07-19T00:33 | -18.1287 | 169.5182 | -1881 | 1873 | 200 | 6.4 | -258 | 860 | 1.70 | 980 | 40 | 22.1 | 0.13 | 0.23 | 0.10 | 21.0 | 0.63 | 61.00 | 7.1 | 116.00 | 11.8 |
SO229-60-1 | 60 ROV 07 | Black Smoker, buoyant plume | Niskin | 2013-07-19T00:33 | -18.1287 | 169.5182 | -1881 | 1873 | 100 | 6.9 | -286 | 540 | 2.40 | 580 | 10 | 22.3 | 0.06 | 0.10 | 0.05 | 20.8 | 0.62 | 33.00 | 6.0 | 41.00 | 7.1 |
SO229-66-1 | 66 ROV 05 | Black Smoker, buoyant plume | Niskin | 2013-07-19T22:02 | -18.1285 | 169.5153 | -1875 | 1862 | 300 | 6.0 | 111000 | 60.00 |