Matter terrigenous organic

Volkman, J. K., 1986, A Review of Sterol Markers for Marine and Terrigenous Organic Matter Organic Geochemistry, Vol. 9, pp. 83-99. 

Volkman, J.K. 1986. A review of sterol markers for marine and terrigenous organic matter. 

In some sediments, downcore variations in the bulk chemical composition are interpretable as records of temporal shifts in the elemental composition of the sinking POM. Such shifts are caused by changes in the production of sinking POM, which are in turn the result of fluctuations in the abundance and diversity of the overlying plankton community. In nearshore sediments, fluctuations in river runoff and lateral transport can lead to shifts in the supply rate of terrigenous organic matter. An example of a nearshore sediment core in which such fluctuations have been recorded is shown in Figure 23.18. 

Hernes, R J., and Benner, R. (2006). Sources and fluxes of terrigenous organic matter in the North Atlantic Ocean and North Atlantic Deep Water. Mar. Chem. 100, 66-79. 

Gordon, E.S., and Goni, M.A. (2003) Sources and distribution of terrigenous organic matter delivered by the Atchafalaya River to sediments in the northern Gulf of Mexico. Geochim. Cosmochim. Acta 67, 2359-2375. 

There are several unresolved issues underlying present estimates and assumptions on the abundance and fate of terrigenous organic matter in the oceans. The first is the composition and proportion... 

There is still much debate about the abundance and composition of terrestrial OC in both margin and pelagic sediments. Terrigenous organic matter contributions may be substantial for several reasons. 

Berner U. and Faber E. (1996) Empirical carbon isotope/ maturity relationships for gases from algal kerogens and terrigenous organic matter, based on dry, open system pyrolysis. Org. Geochem. 24(10/11), 947-995. 

While the bulk of riverine humic substances pass through estuaries with little retention, it is clear that some terrigenous organic matter is retained in the sediments. However, neither the nature of the retained organic material nor its mechanism of delivery to the sediments is understood. Little, if any, metabolism of riverine humic substances appears to occur during the estuarine passage. 

Prakash, A. (1971). Terrigenous organic matter and coastal phytoplankton fertility. In Fertility of the Sea (J. D. Costlow, ed.). Gordon and Breach, New York, pp. 351-369. 

With eustatic sea level transgression and flooding of continental lowlands, transport of terrigenous organic matter into the North American basin may have increased. Analyses of Upper Cretaceous sediments from DSDP Site 6O3B, lower continental rise east of Cape Hatteras, indicate that, the organic matter was continentally derived. d C values of -23.5 to 27.1°/oo, C/N ratios of 32 to 72, and lipid class maxima of unbound alkanes (C-. and Cp-), unbound fatty acids (C and C2g) and bound fatty acids (C-g. 

Alternatively, Jenkyns (9) proposed that with the extension of the subaerial continent, teFrigenous run-off not only enhanced primary productivity in shelf surface waters by Increasing nutrient availability, but also Increased the deposition of terrigenous organic matter in the marine environment. In consideration of these scenarios, both marine organic matter and terrigenous organic matter may have been important components of the sediment. 

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