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Castagnoli et al. 1995
Castagnoli, G.C., Albrecht, A., Beer, J., Bonino, G., Shen, C., Callegari, E., Taricco, C., Dittrich-Hannen, B., Kubik, P., Suter, M. and Zhu, G.M. (1995). Evidence for enhanced 10Be deposition in Mediterranean sediments 35 kyr BP. Geophysical Research Letters 22: doi: 10.1029/95GL00298. issn: 0094-8276.

In this letter, we report the profiles (~160 samples) of 10Be, 9Be, Zn in a Mediterranean sediment core spanning the last 60 kyr. We show the existence of a 10Be peak, whose absolute age is estimated to be 34¿3 kyr BP, based on its stratigraphic position between two tephra layers originating from two volcanic eruptions (Campanian Ignimbrite and Citara), dated by K-Ar, 40Ar-39Ar and 14C methods. This peak is similar to the increase in the 10Be concentration observed in Vostok and Dome C ice cores at the same age. The increase with approximately similar amplitude in both ice and sediment cores at different latitudes and hemispheres cannot be explained by changes in the archives. The present result supports the view of a well defined global enhancement of the 10Be flux, related to an increase of the 10Be production rate and not to a redistribution of the 10Be fallout between different latitudes. ¿ American Geophysical Union 1995

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Abstract

Keywords
Interplanetary Physics, Cosmic rays, Oceanography, Biological and Chemical, Radioactivity and radioisotopes, Oceanography, Biological and Chemical, Geochemistry, Volcanology, Ash deposits
Journal
Geophysical Research Letters
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Publisher
American Geophysical Union
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