Citation:

PANGAEA.472227, Supplement to: Hartmann, M; Lohmann, L (1968): Untersuchungen an der heißen Salzlauge und am Sediment des Atlantis II-Tiefs in Roten Meer. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C1, 13-20

Name: Chemical analysis of water samples of station M1_1207, Red Sea (Table 1-3)
Published: 1968
License: https://creativecommons.org/licenses/by/3.0/

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

Two water samples and two sediment samples taken in 1965 by the R. V. "Meteor" in the area of the hot salt brine of the Atlantis II-Deep were chemically investigated, and in addition the sediment samples were subjected to X-ray and optical analysis.

The investigation of the sulfur-isotope-ratios showed the same values for all water samples. This information combined with the Ca-sulfate solubility data leads us to conclude that, for the most part, the sulfate content of the salt brine resulted from mixing along the boundary with the normal seawater. In this boundary area gypsum or anhydrite is formed which sinks down to the deeper layers of the salt brine where it is redisolved when the water becomes undersaturated. In the laboratory, formation of CaS04 precipitate resulted from both the reheating of the water sample from the uppermost zone of the salt brine to the in-situ-temperature as well as by the mixing of the water sample with normal Red Sea water.

The iron and manganese delivered by the hot spring is separated within the area of the salt brine by their different redox-potentials. Iron is sedimented to a high amount within the salt brine, while, as evidenced by its small amounts in all sediment samples, the more easily reducible manganese is apparently carried out of the area before sedimentation can take place.

The very good layering of the salt brine may be the result of the rough bottom topography with its several progressively higher levels allowing step-like enlargements of the surface areas of each successive layer. Each enlargement results in larger boundary areas along which more effective heat transfer and mixing with the next layer is possible. In the sediment samples up to 37.18% Fe is found, mostly bound as very poorly crystallized iron hydroxide. Pyrite is present in only very small amounts. We assume that the copper is bound mostly as sulfide, while the zinc is most likely present in an other form.

The sulfur-isotope-investigations indicate that the sulfur in the sediment, bound as pyrite and sulfides, is not a result of bacterical sulfate-reduction in the iron-rich mud of the Atlantis II-Deep, but must have been brought up with the hot brine.

Project(s):

Institute for Geosciences, Christian Albrechts University, Kiel (GIK/IfG)

Coverage:

Latitude: 21.300000 * Longitude: 38.000000

Minimum ORDINAL NUMBER: 1 * Maximum ORDINAL NUMBER: 6

Event(s):

M1_1207 * Latitude: 21.300000 * Longitude: 38.000000 * Location: Atlantis II Deep * Campaign: (IIOE - International Indian Ocean Expedition) * Basis: Meteor (1964) * Method/Device: Box corer (BC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	ORDINAL NUMBER	Ord No			Geocode
2	Sample code/label	Sample label		Hartmann, Martin
3	Description	Description		Hartmann, Martin
4	Comment	Comment		Hartmann, Martin
5	Chloride	Cl-	mmol/l	Hartmann, Martin
6	Calcium	Ca	mmol/l	Hartmann, Martin
7	Sulfate	[SO4]2-	mmol/l	Hartmann, Martin
8	Magnesium	Mg	mmol/l	Hartmann, Martin
9	Iron	Fe	µmol/l	Hartmann, Martin
10	Manganese	Mn	µmol/l	Hartmann, Martin
11	Oxygen	O2	µmol/l	Hartmann, Martin
12	pH	pH		Hartmann, Martin
13	Alkalinity, total	AT	mmol(eq)/l	Hartmann, Martin
14	δ34S, sulfate	δ34S [SO4]2-	‰ CDT	Hartmann, Martin
15	δ34S, sulfate	δ34S [SO4]2-	‰ CDT	Hartmann, Martin
16	Loss on ignition	LOI	%	Hartmann, Martin
17	Calcium carbonate	CaCO3	%	Hartmann, Martin	Carbonate-CO2
18	Carbon, organic, total	TOC	%	Hartmann, Martin
19	Iron	Fe	%	Hartmann, Martin
20	Manganese	Mn	%	Hartmann, Martin
21	Zinc	Zn	%	Hartmann, Martin
22	Copper	Cu	%	Hartmann, Martin
23	Sulfur, total	TS	%	Hartmann, Martin

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

65 data points

Data

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

1 Ord No	2 Sample label	3 Description	4 Comment	5 Cl- [mmol/l]	6 Ca [mmol/l]	7 [SO4]2- [mmol/l]	8 Mg [mmol/l]	9 Fe [µmol/l]	10 Mn [µmol/l]	11 O2 [µmol/l]	12 pH	13 AT [mmol(eq)/l]	14 δ34S [SO4]2- [‰ CDT]	15 δ34S [SO4]2- [‰ CDT]	16 LOI [%]	17 CaCO3 [%] (Carbonate-CO2)	18 TOC [%]	19 Fe [%]	20 Mn [%]	21 Zn [%]	22 Cu [%]	23 TS [%]
1	1207/121	121 m ueber Grund	Rotes Meerwasser	649.9	9.8	33.8	57.9			0.1	8.17	2.63	20.3
2	1207/6	oberster Salzwasserkoerper	Salzlauge + Sediment	3489.1	95.8	25.8		0.018	928.3		6.50	1.35				1.3		37.18	0.367	0.520	0.4	0.11
3	1207/PW	mittlerer (?) Salzwasserkoerper	Porenwasser aus Probe 1207/B	4806.4	103.8	8.9	37.3	0.716	964.7		6.26		20.4
4	1207/W	unterster (?) Salzwasserkoerper	Salzlauge	5342.3	126.6	8.7	32.6	1.164	855.5		5.61	<1.00	20.3
5	1207/11	5 m ueber Probe 1207/6	Rotes Meerwasser
6	1207/B	mittlerer (?) Salzwasserkoerper	Sedimentprobe											4.3	9.01	2.9	0.5	33.53	0.215	0.580	0.6	0.66