Citation:

PANGAEA.997118 (dataset in review)

Name: Characterization of dust samples from Mauritania and Namibia
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Desert dust; Incubation experiments; Laboratory experiment; Mauritania; Microbial iron reduction; Namibia; Shewanella loihica

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Abstract:

Dust samples were collected in the form of silt crusts from an ephemeral river in Namibia and from a sabkha in Mauritania. Dry surface samples were collected from the Kuiseb river near Rooibank (Namibia) and the inland sabkha Sebkhet Chemchâm in Atar (Mauritania). For dust characterization, the silt crust samples were first loosened and sieved through a 63 µm mesh. The <63 µm fraction was used for all analyses, including specific surface area, total organic carbon (TOC), δ¹³C-TOC, elemental composition, mineral composition and bioavailable Iron(III). These dust samples were subsequently used in incubation experiments with Shewanella loihica. Details of those experiments are provided in a separate dataset. This dataset contains only the dust characterization data.

Keyword(s):

Desert dust; Incubation experiments; Laboratory experiment; Mauritania; Microbial iron reduction; Namibia; Shewanella loihica

References:

Lovley, Derek R; Phillips, Elizabeth J P (1987): Rapid Assay for Microbially Reducible Ferric Iron in Aquatic Sediments. Applied and Environmental Microbiology, 53(7), 1536-1540, https://doi.org/10.1128/aem.53.7.1536-1540.1987

Stookey, Lawrence L (1970): Ferrozine - A new spectrophotometric reagent for iron. Analytical Chemistry, 42, 779-781, https://doi.org/10.1021/ac60289a016

Project(s):

Center for Marine Environmental Sciences (MARUM)

Funding:

German Research Foundation (DFG), grant/award no. 390741603 : EXC 2077: The Ocean Floor – Earth's Uncharted Interface

Coverage:

Median Latitude: -1.096000 * Median Longitude: 1.189600 * South-bound Latitude: -23.166300 * West-bound Longitude: -12.254300 * North-bound Latitude: 20.974300 * East-bound Longitude: 14.633500

Date/Time Start: 2023-04-23T00:00:00 * Date/Time End: 2025-01-29T00:00:00

Event(s):

Dust_sampling_Mau_2025 (Mauritanian dust) * Latitude: 20.974300 * Longitude: -12.254300 * Date/Time: 2025-01-29T00:00:00 * Location: Mauritania * Method/Device: Sampling by hand (HAND) * Comment: Original sampling location

Dust_sampling_Nam_2023 (Namibian dust) * Latitude: -23.166300 * Longitude: 14.633500 * Date/Time: 2023-04-23T00:00:00 * Location: Namibia * Method/Device: Sampling by hand (HAND) * Comment: Original sampling location

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		van Kaam, Rianne J M
2	Optional event label	Event 2		van Kaam, Rianne J M
3	Latitude of event	Latitude		van Kaam, Rianne J M
4	Longitude of event	Longitude		van Kaam, Rianne J M
5	Date/Time of event	Date/Time		van Kaam, Rianne J M
6	Type of study	Study type		van Kaam, Rianne J M
7	Sample type	Samp type		van Kaam, Rianne J M
8	Specific surface area	SSA	m²/g	van Kaam, Rianne J M	Brunauer-Emmett-Teller (BET), Quantasorb. Jr. Sorption System, Quanrachrome Corporation
9	Carbon, organic, total	TOC	%	van Kaam, Rianne J M	Flash Isotope Ratio Mass Spectrometer (IRMS); coupled with Mass Spectrometer Delta V Advantage via Conflo IV interface	[wt%]
10	δ13C, total organic carbon	δ13C TOC	‰ PDB	van Kaam, Rianne J M	Flash Isotope Ratio Mass Spectrometer (IRMS); coupled with Mass Spectrometer Delta V Advantage via Conflo IV interface	vs. VPDB
11	Iron III, bioavailable	Fe(III) bioav	µmol/g	van Kaam, Rianne J M	VantaStar microplate reader, BMG Labtech	Extraction according to Lovley and Phillips (1987; doi:10.1128/aem.53.7.1536-1540.1987). Analysis through colorimetrically with ferrozine according to Stookey (1970; doi:10.1021/ac60289a016).
12	Aluminium	Al	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
13	Barium	Ba	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
14	Bromine	Br	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
15	Calcium	Ca	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
16	Chlorine	Cl	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
17	Chromium	Cr	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
18	Copper	Cu	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
19	Iron	Fe	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
20	Potassium	K	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
21	Magnesium	Mg	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
22	Manganese	Mn	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
23	Sodium	Na	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
24	Nickel	Ni	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
25	Oxygen	O2	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
26	Phosphorus	P	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
27	Palladium	Pd	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
28	Palladium	Pd	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
29	Rhodium	Rh	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
30	Sulfur	S	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
31	Silicon	Si	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
32	Strontium	Sr	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
33	Titanium	Ti	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
34	Vanadium	V	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
35	Zinc	Zn	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
36	Zirconium	Zr	µmol/g	van Kaam, Rianne J M	X-ray fluorescence spectrometer, PANalytical Epsilon 3XL
37	Amphibole	Amp	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
38	Carbonate minerals	Carb min	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
39	Clay	Clay	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
40	Feldspar	Fsp	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
41	Mica	Mica	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
42	Oxide minerals	Ox min	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	-Fe [rel. % ]
43	Oxide minerals	Ox min	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
44	Quartz	Qz	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
45	Serpentine	Srp	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
46	Silicate, residual	Si(OH)4 resid	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
47	Sulfate minerals	[SO4]2- min	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]
48	Zeolite	Zeo	%	van Kaam, Rianne J M	X-Ray Diffractometer, Bruker Corporation, D8 coupled with a Cu Kα X-ray source [40 kV, 40 mA]	[rel. % ]

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

86 data points

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