Long-chain alkenones, long-chain diols and GDGTs over the last 90 Myrs for sediment core Bass River Site ...

We evaluated changes in the distributions of long-chain alkenones, long-chain diols and GDGTs, lipids commonly used for paleothermometry, over the last 90 Myrs for sediments deposited on the New Jersey shelf (the Bass River site) and assessed potential effects of different ancestral producers and diagenesis on their distributions and their impact on the associated temperature proxies. As reported before, the Paleogene distributions of alkenones are generally similar to those in haptophytes, but unusual alkenone distributions, characterized by a dominant di-unsaturated C40 alkenone, are observe... Mehr ...

Verfasser: de Bar, Marijke W
Rampen, Sebastiaan W
Hopmans, Ellen C
Sinninghe Damsté, Jaap S
Schouten, Stefan
Dokumenttyp: Artikel
Erscheinungsdatum: 2019
Verlag/Hrsg.: PANGAEA
Schlagwörter: Drilling/drill rig / Leg174AX / NIOZ Royal Netherlands Institute for Sea Research / and Utrecht University NIOZ_UU / Ocean Drilling Program ODP
Sprache: Englisch
Permalink: https://search.fid-benelux.de/Record/base-29159962
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://dx.doi.org/10.1594/pangaea.897908

We evaluated changes in the distributions of long-chain alkenones, long-chain diols and GDGTs, lipids commonly used for paleothermometry, over the last 90 Myrs for sediments deposited on the New Jersey shelf (the Bass River site) and assessed potential effects of different ancestral producers and diagenesis on their distributions and their impact on the associated temperature proxies. As reported before, the Paleogene distributions of alkenones are generally similar to those in haptophytes, but unusual alkenone distributions, characterized by a dominant di-unsaturated C40 alkenone, are observed for Late Cretaceous sediments, suggesting different ancestral source organisms for alkenones in this interval. The isoprenoid GDGT distributions remained comparable to modern-day distributions, suggesting that the TEX86 can be applied up to ca. 90 Ma. The Miocene long-chain diol distributions are similar to modern-day distributions, but the older sediments reveal unusual distributions, dominated by the C28 1,12- and ... : Supplement to: de Bar, Marijke W; Rampen, Sebastiaan W; Hopmans, Ellen C; Sinninghe Damsté, Jaap S; Schouten, Stefan (2019): Constraining the applicability of organic paleotemperature proxies for the last 90 Myrs. Organic Geochemistry, 128, 122-136 ...