Early diagenesis of fatty acids and hydrocarbons in a salt marsh environment

Details Early diagenesis of fatty acids and hydrocarbons in a salt marsh environment Early diagenesis of fatty acids and hydrocarbons in a salt marsh environment

Aug 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37.1943j&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 8, pp.1943-1955

Computer Science

8

Scientific paper

In a salt marsh environment, plant-produced fatty acids and aliphatic hydrocarbons undergo significant modification upon being deposited in sediment. The major changes include alteration of the distribution pattern of straight chain components, increase in the concentration of branched components and decrease in the concentration of unsaturated components. Changes are similar in both oxidizing and reducing environments. Carbon isotope measurements indicate that there is little horizontal movement of sediment organics. Spartina alterniflora has a C 13 = - 12.5% (vs NBS 20) and Juncus romerianus has a C 13 = -23.2%. Sediment organic matter taken from cores up to 60 cm in depth retains a C 13 value similar to the plant species growing at the core site. Microbial metabolism appears to be responsible for the observed in situ changes in sediment lipids. The in situ changes did not result in significant alteration of C 13 values.

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