Publication Date:
2023-05-12
Description:
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.
Keywords:
Alkene, carbon maximum number; Alkenes; Carbon Preference Index, n-Alkanes; DEPTH, sediment/rock; Gabes_S; Gas chromatography - Mass spectrometry (GC-MS); Gravimetric analysis; Hydrocarbons; LATITUDE; LONGITUDE; n-Alkane; n-Alkane, carbon maximum number; n-Alkane, detected carbon number range; Pristane/Phytane ratio; Sample code/label; Unresolved complex mixture
Type:
Dataset
Format:
text/tab-separated-values, 159 data points
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