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- W2133345488 abstract "As part of a larger study of diagenesis in the sediment of Saanich Inlet, several groups of organic compounds were isolated from the sediment, identified, their concentration quantitatively determined and where possible, the C13C12 isotope ratio determined. Four 2.5 m cores and one 35 m core were studied. It was found that chlorins show the greatest decrease with depth followed by amino acids and then fatty acids. Aliphatic straight chain hydrocarbons show little change in concentration with depth of sediment, although the aromatic hydrocarbon perylene gave evidence for in situ formation. Fulvic acids, highly abundant at the surface of the sediment, decreased significantly with depth, whereas humic acids did not appear to show any significant change. The amount of insoluble residue increased with depth, constituting the dominant organic carbon form at 17 m and below. There is no strong evidence for significant hydrocarbon formation under mild conditions prevailing, although C16 fatty acids appear to be degrading preferentially and may partially convert to the C15 paraffin. There is no evidence for in situ formation of isoprenoid hydrocarbons from the phytol side chain of chlorophyll. Pristane and phytane, present in small concentrations at the sediment surface, decrease or disappear with burial. Carbon isotope (C13C12) ratios, were used to determine the relative amounts of organic matter derived from terrigenous and marine sources. Humic acids appear to form largely from plankton-derived material and not from terrigenous plant or soil sources." @default.
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- W2133345488 date "1972-11-01" @default.
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- W2133345488 title "Early diagenesis in a reducing fjord, Saanich Inlet, British Columbia—III. Changes in organic constituents of sediment" @default.
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- W2133345488 doi "https://doi.org/10.1016/0016-7037(72)90045-2" @default.
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