Citation:

PANGAEA.933613

Name: Redox-sensitive metal concentrations and isotopic composition of dissolved sulfate in a sandy subterranean estuary of the southern North Sea (Spiekeroog Island, May 2014)
Published: 2021-07-13
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Molybdenum; Oxygen isotopes; Rhenium; Sulfur isotopes; Uranium; Vanadium

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Published: 2021-07-13 • DOI registered: 2021-08-12

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Abstract:

The redox-sensitive metals Mn, Fe, U, Re, Mo, and V and sulfur cycling were studied within the subterranean estuary of a sand beach on Spiekeroog Island, Northern Germany. Pore water samples were obtained along a cross-shore transect down to 5 m below the sediment surface. Redox conditions range from oxic, close to the base of the dune, to sub- to anoxic towards the low water line. We could show that biogeochemical processes alter not only the pore water concentrations of the trace metals, but are also reflected by the O isotope- and to a minor degree the S isotope composition of dissolved sulfate. Seawater circulation through sediments of the upper beach (duneward part of the intertidal zone) removes U and V from solution, but serves as a source for Mn, Fe, Re, and Mo to the ocean. Pore water discharging from a berm close to the low water line exhibits lower U, V, and Re concentrations than adjacent seawater. This part of the beach thus serves as a sink for U, V, and Re, but as a source for Mn, Fe, and Mo. No significant Mo depletion is found in the pore water, due to the lack of dissolved sulfide.

Keyword(s):

Molybdenum; Oxygen isotopes; Rhenium; Sulfur isotopes; Uranium; Vanadium

Related to:

Reckhardt, Anja; Beck, Melanie; Greskowiak, Janek; Schnetger, Bernhard; Böttcher, Michael Ernst; Gehre, Matthias; Brumsack, Hans-Jürgen (2017): Cycling of redox-sensitive elements in a sandy subterranean estuary of the southern North Sea. Marine Chemistry, 188, 6-17, https://doi.org/10.1016/j.marchem.2016.11.003

Funding:

Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. 288572447 : Biogeochemical processes in sandy beach sediments of Spiekeroog Island and Majorca

Coverage:

Median Latitude: 53.781140 * Median Longitude: 7.710815 * South-bound Latitude: 53.779946 * West-bound Longitude: 7.700090 * North-bound Latitude: 53.782821 * East-bound Longitude: 7.711924

Date/Time Start: 2014-05-14T00:00:00 * Date/Time End: 2014-05-22T00:00:00

Event(s):

Spiekeroog_beach_May_2014 * Latitude Start: 53.779950 * Longitude Start: 7.710658 * Latitude End: 53.782820 * Longitude End: 7.711924 * Date/Time Start: 2014-05-19T00:00:00 * Date/Time End: 2014-05-22T00:00:00 * Method/Device: Water sample (WS)

Spiekeroog_CloseToBeach_May_2014 * Latitude: 53.780950 * Longitude: 7.700090 * Date/Time: 2014-05-14T00:00:00 * Method/Device: Water sample (WS) * Comment: Seawater sample close to Spiekeroog beach

Comment:

The seawater sample (event "Spiekeroog_CloseToBeach_May_2014") was taken on 2014-05-14 during low tide at 0.5 m water depth by submerging a precleaned polyethylene beaker.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Reckhardt, Anja
2	Station label	Station		Reckhardt, Anja		site identifier
3	DEPTH, sediment/rock	Depth sed	m	Reckhardt, Anja		Geocode – depth below sediment surface
4	LATITUDE	Latitude		Reckhardt, Anja		Geocode – calculated from UTM coordinates
5	LONGITUDE	Longitude		Reckhardt, Anja		Geocode – calculated from UTM coordinates
6	UTM Zone, Universal Transverse Mercator	UTM Zone		Reckhardt, Anja
7	UTM Easting, Universal Transverse Mercator	UTM east	m	Reckhardt, Anja
8	UTM Northing, Universal Transverse Mercator	UTM north	m	Reckhardt, Anja
9	Distance	Distance	m	Reckhardt, Anja		Distance from most inland sampling point
10	ELEVATION	Elevation	m a.s.l.	Reckhardt, Anja		Geocode – Topography relative NHN (Normalhöhennull)
11	pH	pH		Reckhardt, Anja
12	Salinity	Sal		Reckhardt, Anja	Conductivity probe
13	Nitrate	[NO3]-	µmol/l	Reckhardt, Anja	Calculated	calc. NOx-NO2
14	Sulfate	[SO4]2-	mmol/l	Reckhardt, Anja	Ion chromatography
15	Hydrogen sulfide	H2S	µmol/l	Reckhardt, Anja	Photometric
16	Manganese	Mn	µmol/l	Reckhardt, Anja	ICP-OES/ICP-MS
17	Iron	Fe	µmol/l	Reckhardt, Anja	ICP-OES/ICP-MS
18	Molybdenum	Mo	nmol/l	Reckhardt, Anja	ICP-MS
19	Rhenium	Re	pmol/l	Reckhardt, Anja	ICP-MS
20	Uranium	U	nmol/l	Reckhardt, Anja	ICP-MS
21	Vanadium	V	nmol/l	Reckhardt, Anja	ICP-MS
22	δ34S, sulfate	δ34S [SO4]2-	‰ CDT	Reckhardt, Anja
23	δ18O, sulfate	δ18O [SO4]2-	‰ SMOW	Reckhardt, Anja
24	δ18O, water	δ18O H2O	‰ SMOW	Reckhardt, Anja

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

618 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Station	3 Depth sed [m]	4 Latitude	5 Longitude	6 UTM Zone	7 UTM east [m]	8 UTM north [m]	9 Distance [m]	10 Elevation [m a.s.l.]	11 pH	12 Sal	13 [NO3]- [µmol/l]	14 [SO4]2- [mmol/l]	15 H2S [µmol/l]	16 Mn [µmol/l]	17 Fe [µmol/l]	18 Mo [nmol/l]	19 Re [pmol/l]	20 U [nmol/l]	21 V [nmol/l]	22 δ34S [SO4]2- [‰ CDT]	23 δ18O [SO4]2- [‰ SMOW]	24 δ18O H2O [‰ SMOW]
Spiekeroog_beach_May_2014	0	2.0	53.779946	7.710658	32U	415041.249	5959810.036	0	2.76	8.4	4.3	199.6	4.1		0.1	0.0	40.3	24.4	3.3	100.9
Spiekeroog_beach_May_2014	0	3.0	53.779946	7.710658	32U	415041.249	5959810.036	0	2.76	8.2	7.0	252.2	6.6		0.5	0.1	51.5	19.8	6.0	103.6
Spiekeroog_beach_May_2014	0	3.5	53.779946	7.710658	32U	415041.249	5959810.036	0	2.76	8.5	7.2	237.2	6.1	0.0	0.1	0.0	42.2	17.4	5.2	112.0
Spiekeroog_beach_May_2014	0	4.0	53.779946	7.710658	32U	415041.249	5959810.036	0	2.76	8.3	8.5	264.3	7.7	0.0	0.2	0.2	50.6	19.5	6.4	88.7
Spiekeroog_beach_May_2014	0	4.5	53.779946	7.710658	32U	415041.249	5959810.036	0	2.76	8.3	9.4	233.7	7.8	0.0	0.3	0.1	59.2	19.7	6.7	48.8
Spiekeroog_beach_May_2014	0	5.0	53.779946	7.710658	32U	415041.249	5959810.036	0	2.76	8.2	9.2	165.5	7.6	0.0	0.2	0.1	49.7	22.4	7.0	33.3
Spiekeroog_beach_May_2014	0+21m	1.5			32U			21	2.50	8.1	10.0	243.8	8.5		0.1	0.0	70.2	23.1	8.9	63.6
Spiekeroog_beach_May_2014	0+21m	2.0			32U			21	2.50	8.1	11.6	186.8	9.8		0.4	0.1	75.7	22.2	9.4	67.0
Spiekeroog_beach_May_2014	1	1.0	53.780307	7.710879	32U	415056.57	5959849.937	43	2.22	7.5	15.1	25.5	13.2
Spiekeroog_beach_May_2014	1	1.5	53.780307	7.710879	32U	415056.57	5959849.937	43	2.22	8.0	17.6	85.2	14.7	0.0	0.1	0.0	76.1	26.0	7.9	69.0
Spiekeroog_beach_May_2014	1	2.0	53.780307	7.710879	32U	415056.57	5959849.937	43	2.22	8.1	18.5	97.1	15.5	0.0	0.2	0.1	89.8	24.8	8.9	61.0
Spiekeroog_beach_May_2014	1	2.5	53.780307	7.710879	32U	415056.57	5959849.937	43	2.22	8.1	15.2	132.9	12.8	0.0	0.5	0.2	72.0	23.2	7.6	58.0
Spiekeroog_beach_May_2014	1	5.2	53.780307	7.710879	32U	415056.57	5959849.937	43	2.22	8.1	15.5	118.2			0.2	0.1	65.0	23.1	9.4	36.5
Spiekeroog_beach_May_2014	1+20m	1.0			32U			63	2.21	8.1	19.9	90.2	17.0	0.0	0.2	0.0	86.6	29.2	8.9	52.6
Spiekeroog_beach_May_2014	1+20m	1.5			32U			63	2.21	8.0	19.9	96.3	17.3	0.0	0.1	0.3	87.5	41.2	9.2	52.1
Spiekeroog_beach_May_2014	1+20m	2.0			32U			63	2.21	8.0	20.2	86.4	17.5	0.0	0.2	0.0	83.4	30.5	9.4	41.4
Spiekeroog_beach_May_2014	1+50m	1.0			32U			93	1.95	7.8	28.6	27.2	24.6		0.4	0.0	116.9	39.6	11.9	35.2
Spiekeroog_beach_May_2014	1+50m	1.5			32U			93	1.95	7.9	25.9	52.2	22.4		0.2
Spiekeroog_beach_May_2014	1+50m	2.0			32U			93	1.95	7.9	27.2	48.1	23.2		0.5	0.0	113.7	35.3	11.4	25.4
Spiekeroog_beach_May_2014	2	0.5	53.781176	7.71135	32U	415089.378	5959946.022	145	1.32	7.4	28.8	17.5	24.9	0.0	0.2	1.7	124.0	35.4	9.4	18.7
Spiekeroog_beach_May_2014	2	1.0	53.781176	7.71135	32U	415089.378	5959946.022	145	1.32	7.3	29.4	70.9	25.6		0.0	0.2	102.1	37.1	7.9	23.7
Spiekeroog_beach_May_2014	2	1.5	53.781176	7.71135	32U	415089.378	5959946.022	145	1.32	7.7	26.0	41.2	22.8	0.0	0.0	0.1	95.0	35.9	10.7	21.3
Spiekeroog_beach_May_2014	2	1.8	53.781176	7.71135	32U	415089.378	5959946.022	145	1.32	7.7	31.3	94.3	26.8	0.0	0.1	0.5	113.6	42.4	13.1	21.3
Spiekeroog_beach_May_2014	2	3.5	53.781176	7.71135	32U	415089.378	5959946.022	145	1.32	7.9	29.1	53.6	25.5	0.0	0.8	5.9	177.8	63.1	11.9	5.9
Spiekeroog_beach_May_2014	2	5.0	53.781176	7.71135	32U	415089.378	5959946.022	145	1.32	8.1	27.0	78.5	23.9	0.0	0.2	0.5	103.2	38.0	12.0	21.2
Spiekeroog_beach_May_2014	2+50m	0.5			32U			195	-0.81	8.0	28.0	0.0	24.4		0.8	34.0	101.6	32.9	10.1	6.7
Spiekeroog_beach_May_2014	2+50m	0.8			32U			195	-0.81	8.0	28.1	0.9	24.5		0.5	26.9	99.5	40.5	10.9	6.0
Spiekeroog_beach_May_2014	2+50m	1.2			32U			195	-0.81	7.9	27.1	0.0	23.9	0.0	0.6	10.9	110.8	38.7	9.0	3.2
Spiekeroog_beach_May_2014	2+50m	2.0			32U			195	-0.81	8.0	26.9	0.0	23.4	0.0	0.7	12.2	111.9	37.6	10.4	6.4
Spiekeroog_beach_May_2014	3	0.5	53.782285	7.711742	32U	415117.452	5960068.989	271	-0.764	7.8	28.6	0.8	25.4	0.0	16.6	6.0	104.2	27.4	9.5	15.1	21.4	13.3	-0.51
Spiekeroog_beach_May_2014	3	1.0	53.782285	7.711742	32U	415117.452	5960068.989	271	-0.764	7.7	28.2	<0.2	24.8	0.0	18.0	73.3	96.4	16.1	7.9	15.0
Spiekeroog_beach_May_2014	3	1.5	53.782285	7.711742	32U	415117.452	5960068.989	271	-0.764	7.9	21.4	0.0	18.6	0.0	9.1	56.2	85.0	0.0	3.2	14.4
Spiekeroog_beach_May_2014	3	2.0	53.782285	7.711742	32U	415117.452	5960068.989	271	-0.764	8.0	14.9	0.0	13.5	0.0	1.2	26.7	56.4	8.5	3.0	12.5	21.3	13.3	-3.97
Spiekeroog_beach_May_2014	4	0.5	53.782821	7.711924	32U	415130.503	5960128.328	331	-0.759	7.7	29.0	0.0	25.4	0.0	22.3	74.0	109.7	0.0	7.8	12.1	21.4	15.9	-0.57
Spiekeroog_beach_May_2014	4	1.0	53.782821	7.711924	32U	415130.503	5960128.328	331	-0.759	7.6	28.4	0.0	24.8		45.1	149.1	115.9	9.2	5.7	17.7
Spiekeroog_beach_May_2014	4	1.5	53.782821	7.711924	32U	415130.503	5960128.328	331	-0.759	7.7	28.3	0.0	24.5	0.0	80.2	108.8	106.8	0.0	3.8	10.7
Spiekeroog_beach_May_2014	4	2.0	53.782821	7.711924	32U	415130.503	5960128.328	331	-0.759	7.6	28.4	0.0	24.6	0.0	33.7	281.7	81.6	0.0	0.9	14.8	21.9	16.8	-0.68
Spiekeroog_beach_May_2014	4+13m	0.5			32U			345	-1.09		28.4	0.0	25.1	0.0	52.0	97.4	97.8	0.0	7.3	17.1
Spiekeroog_beach_May_2014	4+13m	1.0			32U			345	-1.09		27.5	0.0	24.0	0.0	27.9	216.6	91.1	0.0	2.0	14.5
Spiekeroog_beach_May_2014	4+13m	1.5			32U			345	-1.09		27.2	0.0	23.8	0.0	24.6	206.9	87.5	0.0	1.0	10.8
Spiekeroog_beach_May_2014	4+13m	2.0			32U			345	-1.09		28.1	0.0		0.0	29.1	205.8	98.6	0.0	1.4	13.7
Spiekeroog_CloseToBeach_May_2014			53.78095	7.70009	32U	414347	5959934				30.6				0.03	<0.03	101.0	31.0	11.5	21.0	21.0	9.7