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Carotenoid diagenesis in a marine sedimentThe major carotenoids at three levels (3, 40, and 175 m below the sediment-water interface) in a core from a marine sediment (Cariaco Trench, off Venezuela) have been examined. Mass and electronic spectral data have provided evidence for the onset of a progressive reduction of carotenoids in the geological column. The time scale of the process appears to depend on the particular carotenoid. Reduction of up to two double bonds is observed for the diol, zeaxanthin, in the oldest sediment (about 340,000 years old) but no reduction is observed in the younger samples (about 5000 and 56,000 years old). The diketone, canthaxanthin, shows evidence of reduction of up to two double bonds in the 56,000-yr sample and up to five double bonds in the oldest sample. No reduction of beta-carotene was observed in any of the samples.
Document ID
19770048409
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Watts, C. D.
(Bristol Univ. United Kingdom)
Maxwell, J. R.
(Bristol, University Bristol, United Kingdom)
Date Acquired
August 8, 2013
Publication Date
April 1, 1977
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 41
Subject Category
Chemistry And Materials (General)
Accession Number
77A31261
Funding Number(s)
CONTRACT_GRANT: NERC-GR/6/3/2420
CONTRACT_GRANT: NERC-GR/3/655
CONTRACT_GRANT: NGL-05-003-003
Distribution Limits
Public
Copyright
Other

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