Variability in Radiocarbon Ages of Individual Organic Compounds from Marine Sediments-Reference-Cited by-同舟云学术

Variability in Radiocarbon Ages of Individual Organic Compounds from Marine Sediments

Published:1997-08-08 Issue:5327 Volume:277 Page:796-799
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Eglinton Timothy I.¹²³⁴,Benitez-Nelson Bryan C.¹²³⁴,Pearson Ann¹²³⁴,McNichol Ann P.¹²³⁴,Bauer James E.¹²³⁴,Druffel Ellen R. M.¹²³⁴

Affiliation:

1. T. I. Eglinton, B. C. Benitez-Nelson, A. Pearson, Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.

2. A. P. McNichol, National Ocean Sciences Accelerator Mass Spectrometry Facility, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.

3. J. E. Bauer, School of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA.

4. E. R. M. Druffel, Department of Earth System Science, University of California, Irvine, CA 92697, USA.

Abstract

Organic carbon (OC) from multiple sources can be delivered contemporaneously to aquatic sediments. The influence of different OC inputs on carbon-14–based sediment chronologies is illustrated in the carbon-14 ages of purified, source-specific (biomarker) organic compounds from near-surface sediments underlying two contrasting marine systems, the Black Sea and the Arabian Sea. In the Black Sea, isotopic heterogeneity of n -alkanes indicated that OC was contributed from both fossil and contemporary sources. Compounds reflecting different source inputs to the Arabian Sea exhibit a 10,000-year range in conventional carbon-14 ages. Radiocarbon measurements of biomarkers of marine photoautotrophy enable sediment chronologies to be constructed independent of detrital OC influences.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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