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Title:
Terrestrial manganese-53 --- A new monitor of Earth surface processes
Authors:
Schaefer, Joerg M.; Faestermann, Thomas; Herzog, Gregory F.; Knie, Klaus; Korschinek, Gunther; Masarik, Jozef; Meier, Astrid; Poutivtsev, Michail; Rugel, Georg; Schlüchter, Christian; Serifiddin, Feride; Winckler, Gisela
Affiliation:
AA(Lamont-Doherty Earth Observatory, Route 9W, Palisades, NY-10964, USA), AB(Technische Universität München, Fakultät für Physik E15, 85748 Garching bei München, Germany), AC(Rutgers University, Department of Chemistry and Chemical Biology, 610 Taylor Road, Piscataway, NJ 08854-8087, USA), AD(Technische Universität München, Fakultät für Physik E15, 85748 Garching bei München, Germany), AE(Technische Universität München, Fakultät für Physik E15, 85748 Garching bei München, Germany), AF(Commenius University Bratislava, Department of Nuclear Sciences, Bratislava, Slovakia), AG(Technische Universität München, Fakultät für Physik E15, 85748 Garching bei München, Germany), AH(Technische Universität München, Fakultät für Physik E15, 85748 Garching bei München, Germany), AI(Technische Universität München, Fakultät für Physik E15, 85748 Garching bei München, Germany), AJ(Universität Bern, Geologisches Institut, CH-3012 Bern, Switzerland), AK(Rutgers University, Department of Chemistry and Chemical Biology, 610 Taylor Road, Piscataway, NJ 08854-8087, USA; Space Science Laboratory, UC Berkeley, CA 94720-7450.), AL(Lamont-Doherty Earth Observatory, Route 9W, Palisades, NY-10964, USA)
Publication:
Earth and Planetary Science Letters, Volume 251, Issue 3-4, p. 334-345. (E&PSL Homepage)
Publication Date:
11/2006
Origin:
ELSEVIER
Abstract Copyright:
(c) 2006 Elsevier B.V.
DOI:
10.1016/j.epsl.2006.09.016
Bibliographic Code:
2006E&PSL.251..334S

Abstract

We report the first systematic study of the terrestrial cosmogenic radionuclide manganese-53 ( T1/2 = 3.7 Ma) measured in thirteen samples from nine dolerite surfaces in the Dry Valleys, Antarctica. The terrestrial manganese-53 concentrations correlate well with cosmic-ray-produced helium-3 and neon-21 concentrations in the same samples, implying that the manganese-53 is produced continuously in situ and retained quantitatively over millions of years. The terrestrial manganese-53 production rate determination normalized to iron (the only important target element) and to high-latitude and sealevel yields a value of P53 = 103 ± 11 atoms yr - 1 (g Fe) - 1 . This is consistent with the theoretical value of 120 ± 18 atoms yr - 1 (g Fe) - 1 obtained from modeling calculations. Our results show that the manganese-53 concentrations in bulk terrestrial rocks can be used to monitor Earth surface processes on time-scales exceeding 10 My.
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