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Radiocarbon Dating of Aliphatic Hydrocarbons

A New Approach for Dating Passive-Fraction Carbon in Soil Horizons

Yongsong Huang^,a, Baocai Li^a, Charlotte Bryant^b, Roland Bol^c and Geoffrey Eglinton^a

^a Biogeochemistry Research Center, Dep. of Geology, Univ. of Bristol, Bristol, BS8 1RJ, UK
^b NERC Radiocarbon Lab., Scottish Enterprise Technology Park, East Kilbride, Glasgow G75 0QF, UK
^c Inst. of Grassland and Environmental Research, North Wyke, Okehampton, Devon EX20 2SB, UK

View larger version (15K): [in a new window]   Fig. 1 Gas chromatograms of the aliphatic hydrocarbon fraction from peaty gley (Core PG6) before and after the treatment by RuO4 oxidation. Alkenes (primarily hopenes of bacterial origin) were oxidized and then removed chromatographically. The dotted peaks are leaf-wax n-alkanes that are untouched by RuO4 oxidation

View larger version (24K): [in a new window]   Fig. 2 Radiocarbon ages for saturated aliphatic hydrocarbons, and total organic matter in peaty gley (Core PG6). Depth–age functions are shown on the right-hand diagram. The errors are smaller than symbol sizes