10Be dating of North Pacific sediment cores up to 2.5 million years B.P.

Details 10Be dating of North Pacific sediment cores up to 2.5 million years B.P. 10Be dating of North Pacific sediment cores up to 2.5 million years B.P.

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979e%26psl..45..181t&link_type=abstract

Earth and Planetary Science Letters, Volume 45, Issue 1, p. 181-187.

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Scientific paper

The 10Be method of dating of marine sediment cores is applied to five North Pacific cores. Assuming a constant 10Be precipitation rate and varying sedimentation rates with time during the past 2.5 m.y. dating confirms to that obtained from paleomagnetic stratigraphy. The 10Be concentration variations with depth in the cores are primarily due to changes in sediment dilution and do not reflect cosmic ray intensity or global climate variations. The limits of 10Be deposition rate variation in the investigated cores are less than +/- 10% for periods of (2-7) × 105 years and less than +/-30% for periods of 1 × 105 years. The data set gives a half-life of 10Be is 1.50 × 106 years. The latitudinal effect of 10Be concentrations and 10Be/9Be ratios relates to a frequency of particulate matter occurrence (detrital and biological particles) in the oceans and to oceanic circulation.

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