A radiocarbon-based assessment of the preservation characteristics of crenarchaeol and alkenones from continental margin sediments

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doi: 10.1016/j.orggeochem.2008.02.006
Author(s): Mollenhauer, Gesine; Eglinton, Timothy I.; Hopmans, Ellen C.; Sinninghe Damsté, Jaap S.
Author Affiliation(s): Primary:
Alfred-Wegener Institute for Polar and Marine Research, Bremerhaven, Federal Republic of Germany
Other:
Integrated Geochemical Interpretation, United Kingdom
Woods Hole Oceanographic Institution, United States
Royal Netherlands Institute for Sea Research, Netherlands
Volume Title: Advances in organic geochemistry 2007; proceedings of the 23rd international meeting on Organic geochemistry
Volume Author(s): Pancost, Richard D., editor; Farrimond, Paul
Source: Organic Geochemistry, 39(8), p.1039-1045; 23rd international meeting on Organic geochemistry, Torquay, United Kingdom, Sept. 9-14, 2007, edited by Richard D. Pancost and Paul Farrimond. Publisher: Elsevier, International. ISSN: 0146-6380
Note: In English. Based on Publisher-supplied data
Summary: Crenarchaeotal glycerol dibiphytanyl glycerol tetraether (GDGT) lipids and alkenones are two types of biomarkers, derived from planktonic marine microorganisms, which are used for reconstruction of sea surface temperature. We determined the radiocarbon contents of the archaeal GDGT crenarchaeol and of alkenones isolated from continental margin sediments. Systematic differences were found between the two biomarkers, with higher radiocarbon content in crenarchaeol than in the phytoplankton-derived alkenones. These differences can be explained by variable contributions of pre-aged, laterally-advected material to the core sites. Crenarchaeol appears to be more efficiently degraded during transport in oxygen-replete environments than alkenones. Whether this reflects the influence of chemical structure or mode of protection (e.g., particle association) is not known. Abstract Copyright (2008) Elsevier, B.V.
Year of Publication: 2008
Key Words: 02 Geochemistry; Alkenones; Biomarkers; C-14; Carbon; Continental margin; Continental margin sedimentation; Crenarchaeol; Ethers; Geochemistry; Isotopes; Ketones; Marine sediments; Organic compounds; Phytoplankton; Plankton; Radioactive isotopes; Sedimentation; Sediments
Record ID: 2009080335
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands

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