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| Titel |
The drainage of the Baltic Ice Lake and a new Scandinavian reference 10Be production rate |
| VerfasserIn |
Arjen P. Stroeven, Jakob Heyman, Derek Fabel, Svante Björck, Marc W. Caffee, Ola Fredin, Jonathan M. Harbor |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250114480
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| Publikation (Nr.) |
 EGU/EGU2015-14837.pdf |
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| Zusammenfassung |
| An important constraint on the reliability of cosmogenic nuclide exposure dating is the
derivation of tightly controlled production rates. We present a new dataset for 10Be
production rate calibration from Mount Billingen, southern Sweden, the site of the final
drainage of the Baltic Ice Lake, an event dated to 11,620 ± 100 cal yr BP. Nine samples of
flood-scoured bedrock surfaces and depositional boulders and cobbles unambiguously
connected to the drainage event yield a reference 10Be production rate of 4.09 ± 0.22 atoms
g-1 yr-1 for the CRONUS Lm scaling and 3.93 ± 0.21 atoms g-1 yr-1 for the LSD general
spallation scaling. We also recalibrate the reference 10Be production rates for four
sites in Norway and combine these with the Billingen results to derive a tightly
clustered Scandinavian reference 10Be production rate of 4.12 ± 0.10 (4.12 ± 0.25
for altitude scaling) atoms g-1 yr-1 for the Lm scaling scheme and 3.96 ± 0.10
(3.96 ± 0.24 for altitude scaling) atoms g-1 yr-1 for the LSD scaling scheme. |
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