RADIOCARBON DATING OF ALKENONES FROM MARINE SEDIMENTS: III. INFLUENCE OF SOLVENT EXTRACTION PROCEDURES ON 14C MEASUREMENTS OF FORAMINIFERA


 
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1. Title Title of document RADIOCARBON DATING OF ALKENONES FROM MARINE SEDIMENTS: III. INFLUENCE OF SOLVENT EXTRACTION PROCEDURES ON 14C MEASUREMENTS OF FORAMINIFERA
 
2. Creator Author's name, affiliation, country Naohiko Ohkouchi
 
2. Creator Author's name, affiliation, country Timothy I Eglinton
 
2. Creator Author's name, affiliation, country Konrad A Hughen
 
2. Creator Author's name, affiliation, country Ellen Roosen
 
2. Creator Author's name, affiliation, country Lloyd D Keigwin
 
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4. Description Abstract As a result of the growing use of multiple geochemical proxies to reconstruct ocean and climate changes in the past, there is an increasing need to establish temporal relationships between proxies derived from the same marine sediment record and ideally from the same core sections. Coupled proxy records of surface ocean properties, such as those based on lipid biomarkers (e.g. alkenone-derived sea surface temperature) and planktonic foraminiferal carbonate (oxygen isotopes), are a key example. Here, we assess whether 2 different solvent extraction procedures used for isolation of molecular biomarkers influence the radiocarbon contents of planktonic foraminiferal carbonate recovered from the corresponding residues of Bermuda Rise and Cariaco Basin sediments. Although minor ∆14C differences were observed between solvent-extracted and unextracted samples, no substantial or systematic offsets were evident. Overall, these data suggest that, in a practical sense, foraminiferal shells from a solvent-extracted residue can be reliably used for 14C dating to determine the age of sediment deposition and to examine age relationships with other sedimentary constituents (e.g. alkenones).
 
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7. Date (YYYY-MM-DD) 2005-01-01
 
8. Type Status & genre Peer-reviewed Article
 
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9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/2836
 
11. Source Title; vol., no. (year) Radiocarbon; Vol 47, No 3 (2005)
 
12. Language English=en
 
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