Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-28T15:50:44.983Z Has data issue: false hasContentIssue false
  • English
  • Français

A Cosmic Matter Accretion Event Around 660,000 Years Before Present Found in Two Dated, Central Pacific Cores

Published online by Cambridge University Press:  12 April 2016

Kazuo Yamakoshi ,
Ken’ichi Nogami ,
Rie Omori ,
Ma Jianguo  and
Ma Shulan
Kazuo Yamakoshi
Affiliation:
Institute for Cosmic Ray Research Univ.Tokyo, Tanashi Tokyo 188Japan
Ken’ichi Nogami
Affiliation:
Phys.Lab., Dokkyo Univ.School MedicineMibu Shimotsugagun 321-2Japan
Rie Omori
Affiliation:
Phys.Lab., Dokkyo Univ.School MedicineMibu Shimotsugagun 321-2Japan
Ma Jianguo
Affiliation:
Appl.Nucl.Tech.Div.Inst.High Energy Phys.Chinese Academy of Science Beijing, China
Ma Shulan
Affiliation:
Appl.Nucl.Tech.Div.Inst.High Energy Phys.Chinese Academy of Science Beijing, China

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In order to study large-scaled cosmic matter accretion events in the past, Ir enriched layers at C-T and other geological boundaries and dated sedimental cores have been searched by many scientists. In this work, Iridium contents and the ratios of (Co/Fe) in two dated, respective layers of the cores are determined. These samples were dated fortunately with the paleomagnetic and also with the cosmogenic Be-10 methods. Ir enrichments are found at (0.660 ± 0.030) My before present.

Type
Interplanetary Dust: Space and Earth Environment Studies
Information
International Astronomical Union Colloquium , Volume 126: Origin and Evolution of Interplanetary Dust , 1991 , pp. 53 - 56
Copyright
Copyright © Kluwer 1991

References

Kobayashi, K and Kitazawa, K 1971 Deep Sea Res. 18 1045 Google Scholar
Takayanagi, M and Ojima, M 1987 J.Geophys.Res. 92 12531 CrossRefGoogle Scholar
Tanaka, S and Inoue, T 1979 Earth Planet.Sci.Lett. 45 181 CrossRefGoogle Scholar
Yaraakoshi, K 1988 Abstracts LPSC 19th(Houston) 130 Google Scholar