Dating Bulk Sediments from Limnic Deposits Using a Grain-Size Approach
Bibliographic Data
| ID | 9242230 |
|---|---|
| Authors | Leo Rothacker, Alexander Dreves, Frank Sirocko (0000-0002-3131-0613), Pieter M Grootes (0000-0003-4265-3168), Marie-Josée Nadeau, Marie‐josée Nadeau (0000-0001-9616-5632) |
| Year | 2013 |
| Volume | 55 |
| Issue | 2 |
| Pages | 943-950 |
| Publication date | 2013-01-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/s0033822200058094 |
| OpenAlex | W2055689764 |
| Language | EN |
| Citations received | 1 |
| References cited | 18 |
Radiocarbon measurements on bulk subaqueous sediments typically provide ages significantly older than actual time of deposition. This is generally caused by the presence of reworked organic compounds, which are depleted in 14 C. To explore this issue of age heterogeneity, we collected 4 organic-rich samples from varying depths in a lake sediment core at the Gemündener Maar (Eifel, Germany), a lake of volcanic origin. We divided each sample into 5 standard grain-size fractions: gravel, sand, silt, clay, and 1 fraction smaller than 0.45 μm. These were cleaned separately using a standard acid-alkali-acid treatment. The highly organic gravel-size fraction provided the youngest 14 C ages of all grain-size fractions and seems to be associated most closely with the time of deposition. By contrast, the silt and clay fractions show significantly older ages. If the investigated limnic sediment layer does not contain any identifiable terrestrial macrofossils, extracting and measuring coarser grain-size fractions instead of measuring bulk sediment samples will provide a better approximation of the time of sedimentation
Geochemistry · Geomorphology · Grain size · Holocene · Maar · Macrofossil · Mineralogy · Radiocarbon dating · Sediment · Sedimentation · Silt · Total organic carbon · Volcano · Chemistry · Geological formations and processes · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Environmental Chemistry · Geology · Paleontology
Radiocarbon Geochemistry of Modern and Ancient Arctic Lake Systems, Baffin Island, Canada
Bio- and chronostratigraphy of the lateglacial in the Eifel region, Germany
Accurate Dating of Organic Deposits by AMS 14 C Measurement of Macrofossils
Twenty-Five Years of Radiocarbon Dating Soils
Sample Throughput and Data Quality at the Leibniz-Labor AMS Facility
Stepped-Combustion 14 C Dating of Sediment
Discussion Reporting of 14 C Data
Regional Sources of Volcanic Carbon Dioxide and Their Influence on 14 C Content of Present-Day Plant Material
| Highly cited | No |
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