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Cosmic Ray Exposure Age Determinations of Cosmic Spherules from Marine Sediments

Published online by Cambridge University Press:  12 April 2016

Kazuo Yamakoshi
Kazuo Yamakoshi*
Affiliation:
Institute for Cosmic Ray Research, University of Tokyo, Tanashi Tokyo 188, Japan

Abstract

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The cosmic ray exposure ages of deep sea metalic lie spherules were determined by various methods; low level countings (Ni-59), neutron activation analysis (Mn-53), high energy accelerator mass spectrometry (Be-10, Al-26) and mass spectrometry (K isotopes). The exposure ages of 0.3 - 50 Ma were obtained. According to Poynting-Robertson effect, the starting points (supplying sources) are located at inner region of the orbit of Saturn.

Type
III. Interplanetary Dust: Laboratory Studies
Information
International Astronomical Union Colloquium , Volume 85: Properties and Interactions of Interplanetary Dust , 1985 , pp. 179 - 181
Copyright
Copyright © Reidel 1985

References

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