Evidence for an increase in cosmogenic Be-10 during a geomagnetic reversal

Details Evidence for an increase in cosmogenic Be-10 during a geomagnetic reversal Evidence for an increase in cosmogenic Be-10 during a geomagnetic reversal

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.315..315r&link_type=abstract

Nature (ISSN 0028-0836), vol. 315, May 23, 1985, p. 315-317.

Physics

35

Beryllium 10, Cosmology, Geomagnetism, Magnetic Variations, Sediments, Climatology, Magnetic Dipoles, Marine Environments, Particle Flux Density

Scientific paper

Evidence from marine sediments for an increase in cosmogenic Be-10 production in the earth's atmosphere during the Bruhnes-Matuyama reversal 730,000 years ago is presented. Measurements of Be-10 in samples of 0.3-1 g were obtained using an accelerator mass spectrometer following chemical purification. The results confirm a peak increase in cosmogenic isotope production at a reversal level of about 1,129 cm. Information on the magnitude and duration of the geomagnetic intensity decrease during the reversal was also obtained.

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