Universität zu Köln

Kusch, Stephanie ORCID: 0000-0002-2708-4975, Mollenhauer, Gesine, Willmes, Christian ORCID: 0000-0002-5566-6542, Hefter, Jens, Eglinton, Timothy I. and Galy, Valier (2021). Controls on the age of plant waxes in marine sediments - A global synthesis. Org. Geochem., 157. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-5290

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Abstract

Sedimentary high molecular weight (HMW) n-alkyl lipids derived from the waxes of terrestrial plants are common target compounds in biogeochemical and paleoenvironmental research. These plant waxes derive predominantly from the epicuticular cover of vascular plant leaves and their relative and absolute abundances and stable isotopic composition can be used as proxies to decipher, e.g., continental climate and land-ocean carbon transfer processes. In marine sediments, however, compound-specific radiocarbon analysis has revealed that plant waxes are often not syn-depositional, but instead are substantially C-14-depleted ('pre-aged') upon deposition. This C-14-depletion can be caused by various processes that either promote retention of plant waxes during transport from source to sink such as storage in soils or entrainment in deposition-resuspension loops in rivers and on continental shelves or, alternatively, by processes that add HMW n-alkyl lipids from other sources (e.g., petrogenic inputs). Here, we review the intrinsic and extrinsic processes affecting the sedimentary plant wax C-14 composition (ranging from chemical processes to continental-scale environmental conditions), how plant wax C-14 compositions translate into mean ages, and which processes control plant wax mean ages in marine sediments. Finally, we use a compilation of available and new compound-specific plant wax C-14 data to provide a synthesis and evaluate the major controls on plant wax mean ages in marine sediments at the global scale. (C) 2021 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kusch, Stephanie UNSPECIFIED orcid.org/0000-0002-2708-4975 UNSPECIFIED Mollenhauer, Gesine UNSPECIFIED UNSPECIFIED UNSPECIFIED Willmes, Christian UNSPECIFIED orcid.org/0000-0002-5566-6542 UNSPECIFIED Hefter, Jens UNSPECIFIED UNSPECIFIED UNSPECIFIED Eglinton, Timothy I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Galy, Valier UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-591982
DOI:	10.1016/j.orggeochem.2021.104259
Journal or Publication Title:	Org. Geochem.
Volume:	157
Date:	2021
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-5290
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COMPOUND-SPECIFIC RADIOCARBON; SOIL ORGANIC-MATTER; SANTA-MONICA BASIN; INDIVIDUAL FATTY-ACIDS; LIPID BIOMARKERS; N-ALKANES; SURFACE SEDIMENT; MAJOR COMPONENT; RESIDENCE TIME; LAKE-SEDIMENTS Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59198