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Aloulou, Fatma; Kallel, Monem; Dammak, Mohamed; Elleuch, Boubaker; Saliot, Alain (2010): (Table 1) Concentration and geological parameters of n-alkanes and n-alkenes in surface sediments from the Gulf of Gabes, Tunisia [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.774595, Supplement to: Aloulou, F et al. (2010): Even-numbered n-alkanes/n-alkenes predominance in surface sediments of Gabes Gulf in Tunisia. Environmental Earth Sciences, 61(1), 1-10, https://doi.org/10.1007/s12665-009-0315-y

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Abstract:
Abstract Hydrocarbons in surface sediments were studied quantitatively and qualitatively in 18 stations along the coastline of Gabes Gulf in Tunisia. The results show that the total hydrocarbon levels vary along a wide range from 90 to 1,800 ppm. The GC-MS profiles of aliphatic hydrocarbons vary according to the stations and show that the hydrocarbons were derived from various sources. A special feature prevalent in several stations was identified: aliphatic hydrocarbons with distinctive chemical features. This includes a high abundance of even-numbered n-alkanes (n-C14 - n-C26, maximizing at n-C18, n-C20 and n-C22) and n-alk-1-enes (n-C14:1 - n-C24:1, maximizing at n-C16:1, n-C18:1, n-C20:1 and n-C22:1). This unusual predominance of even-numbered n-alkanes/alkenes is reported for the first time in the Gulf of Gabes and it thus contributes to the information on the rare occurrence of such distributions in the geosphere.
Coverage:
Median Latitude: 34.434117 * Median Longitude: 10.472011 * South-bound Latitude: 34.088400 * West-bound Longitude: 10.067100 * North-bound Latitude: 34.864400 * East-bound Longitude: 10.965900
Date/Time Start: 2008-01-01T00:00:00 * Date/Time End: 2008-01-01T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
Gabes_S * Latitude: 34.000000 * Longitude: 10.000000 * Date/Time: 2008-01-01T00:00:00 * Elevation: -999.0 m
Comment:
Samples taken from surficial sediments between 0 and 5 cm depth.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelAloulou, Fatma
2DEPTH, sediment/rockDepth sedmGeocode
3LATITUDELatitudeGeocode
4LONGITUDELongitudeGeocode
5HydrocarbonsHCµg/gAloulou, FatmaGravimetric analysis
6n-Alkane, detected carbon number rangen-Alkane rangeAloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)
7n-Alkane, carbon maximum numberCmax n-alkaneAloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)
8n-Alkanen-Alkane%Aloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)n-Alkanes < C21 = sum of nC14-nC20 / total n-alkanes
9Pristane/Phytane ratioPr/PhyAloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)
10Unresolved complex mixtureUCM%Aloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)
11Carbon Preference Index, n-AlkanesCPI n-AlkanesAloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)CPI = (sum of nC17 + nC19+...+ nC27) / (sum of nC16 + nC18 +...+ nC26)
12AlkenesAlkenes%Aloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)
13Alkene, carbon maximum numberCmax alkeneAloulou, FatmaGas chromatography - Mass spectrometry (GC-MS)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
159 data points

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