Preliminary Lipid Analyses of Sections 440A-7-6, 440B-3-5, 440B-8-4, 440B-68-2, and 436-11-4: Legs 56 and 57, Deep Sea Drilling Project

Brassell, Simon C.; Comet, Paul A.; Eglinton, G.; Isaacson, P.; McEnvor, J.; Maxwell, J. R.; Thomson, I.D.; Tibbetts, P. J. C.; Volkmai, J.K.

doi:10.2973/dsdp.proc.5657.170.1980

Cited by 25 publications

(40 citation statements)

References 1 publication

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“…Bound fractions have smaller contributions of land-plant long-chain acids than do the free fractions. A similar difference between distributions of free and bound acids is reported by Brassell et al (1980) in Pleistocene-to-Miocene samples from DSDP Site 440 in the Japan Trench. This difference suggests a more autochthonous origin for the bound fractions of lipids in DSDP samples.…”

Section: Fatty Acidssupporting

confidence: 50%

“…4). The alkanol distributions of the black shales in particular differ from those found in Pleistocene-to-Miocene samples from DSDP Site 362 (Boon et al, 1978) and from DSDP Site 440 (Brassell et al, 1980) in which n-C 2 2 and n-C^ dominate. As also seen in the fatty acid contents, the alkanols indicate more terrigenous material in the black shales than in the green claystones.…”

Section: Alkanolsmentioning

confidence: 76%

“…A second extraction with 0.5N KOH in methanol/toluene provided the hydrolyzable fraction of components. These are called the free and bound fractions, respectively, in this chapter and are comparable to the free and bound fractions of Brassell et al (1980). Both fractions were treated with methanolic boron trifluoride to convert fatty acids to their methyl esters, and then lipid subfractions were separated by column chromatography on silica gel.…”

Section: Methodsmentioning

confidence: 99%

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Organic Geochemical Comparison of Cretaceous Green and Black Claystones from Hole 530A in the Angola Basin

Meyers¹,

Trull²,

Kawka³

1984

Initial Reports of the Deep Sea Drilling Project

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Three pairs of Upper Cretaceous black shales and adjacent green claystones from Hole 53OA were analyzed to compare types and amounts of organic matter and lipids and to seek information about their environments of deposition. The organic-carbon-rich black shales have C/N ratios nearly seven times those of the organic-carbon-lean green claystones. The lipid content of organic matter in the black shales is about ten times less than in adjacent green layers. Organic matter in both types of rocks is thermally immature, and distributions of alkanoic acids, alkanols, sterols, and alkanes contain large amounts of terrigenous components. Pristane/phytane ratios of less than one suggest that younger Turonian sediments were laid down under anoxic conditions, but ratios greater than one suggest that older Turonian Cenomanian deposits accumulated in a more oxic environment. Closely bedded green and black layers have very similar types of lipid distributions and differ primarily in concentrations, although black shales contain somewhat larger amounts of terrigenous lipid components. Geochemical and stratigraphic evidence suggests much of the organic matter in these samples originated on the African continental margin and was transported to the Angola Basin by turbidity flow. Rapid reburial of organic-carbon-rich sediments led to formation of the black shales.

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Section: Fatty Acidssupporting

confidence: 50%

Section: Alkanolsmentioning

confidence: 76%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Organic Geochemical Comparison of Cretaceous Green and Black Claystones from Hole 530A in the Angola Basin

Meyers¹,

Trull²,

Kawka³

1984

Initial Reports of the Deep Sea Drilling Project

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“…Nevertheless, the presence of fatty acids was noted during GC-MS analysis of selected free lipid extracts, and their concentration appeared to decrease downhole, consistent with the notion that they are degraded or incorporated into the bound organic fraction. While we accept that much information useful in paleoclimatic reconstructions can be contained in the component distributions within specific compound classes (e.g., Brassell et al, 1980;Poynter et al, 1989), the intention of the present study is to address a large number of sediment samples while keeping experimental error to a minimum. Consequently, only abundances of those compounds that could be quantitatively determined in every sample are considered in this paper.…”

Section: Site 658 Site 660mentioning

confidence: 99%

Molecular Stratigraphic Study of Sediments from Holes 658A and 660A, Leg 108

Poynter¹,

Farrimond²,

Brassell³

et al. 1989

Proceedings of the Ocean Drilling Program

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The solvent-extractable organic fractions of a series of sediment samples that were taken at specific intervals from Holes 658A and 660A on Ocean Drilling Program Leg 108 were quantitatively analyzed in terms of their molecular composition. The resulting multivariate time series show how the composition and concentration of this organic component is linked to the paleoenvironmental and paleoclimatic histories of the two sites.

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“…All fatty acid distributions have strong even-over-odd predominances, indicating a biogenic character. Extractable and bound fractions have similar disRetention time tributions, unlike samples from Leg 56 (Brassell et al, 1980), Leg 72 (Meyers and Dunham, 1983), or Leg 75 . In these other examples, fatty acids from sediments having 1% or more organic carbon (Legs 56 and 75) contain major contributions of terrigenous components in their extractable fractions and of H-C16 in their bound fractions.…”

Section: Fatty Acidsmentioning

confidence: 99%

Geolipids of Late Cenozoic Sediments from the Western Flank of the East Pacific Rise, Deep Sea Drilling Project Leg 92

Meyers¹,

Powaser²,

Dunham³

et al. 1986

Initial Reports of the Deep Sea Drilling Project

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Low concentrations of organic carbon in slowly accumulating sediments from Sites 597, 600, and 601 reflect a history of low marine productivity in the subtropical South Pacific since late Oligocene times. The distributions of n-alkanes, n-alkanoic acids, and n-alkanols provide evidence of the microbial alteration of sediment organic matter. Landderived hydrocarbons, possibly from eolian transport, dominate n-alkane distributions in these samples.

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Preliminary Lipid Analyses of Sections 440A-7-6, 440B-3-5, 440B-8-4, 440B-68-2, and 436-11-4: Legs 56 and 57, Deep Sea Drilling Project

Cited by 25 publications

References 1 publication

Organic Geochemical Comparison of Cretaceous Green and Black Claystones from Hole 530A in the Angola Basin

Organic Geochemical Comparison of Cretaceous Green and Black Claystones from Hole 530A in the Angola Basin

Molecular Stratigraphic Study of Sediments from Holes 658A and 660A, Leg 108

Geolipids of Late Cenozoic Sediments from the Western Flank of the East Pacific Rise, Deep Sea Drilling Project Leg 92

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