Authors:
S. Sekimoto Kyoto University Research Reactor Institute Kumatori-cho, Sennan-gun Osaka 590-0494 Japan

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T. Kobayashi Nihon University College of Humanities and Sciences Sakurajosui, Setagaya-ku Tokyo 156-8550 Japan

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K. Takamiya Kyoto University Research Reactor Institute Kumatori-cho, Sennan-gun Osaka 590-0494 Japan

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M. Ebihara Tokyo Metropolitan University Department of Chemistry, Graduate School of Science Hachioji, Tokyo 192-0397 Japan

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S. Shibata Kyoto University Research Reactor Institute Kumatori-cho, Sennan-gun Osaka 590-0494 Japan

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Abstract  

Chemical compositions of spherules separated from deep sea sediment dredged off Hawaiian islands and from Antarctic ice were measured by instrumental neutron activation analysis (INAA) using Kyoto University Reactor (KUR). Iron, cobalt, nickel, iridium, scandium and manganese contents in those spherules were determined to be 19.3–97.7%, 23–4370 mg·kg−1, 0.08–7.04%, 0.84–35.4 mg·kg−1, 1.4–44.3 mg·kg−1 and 93.4 mg·kg−1–7.2 %, respectively, and compared with each other. Particularly, iridium was detected in seven spherules among fourteen from Hawaii, but only one spherule among twenty-two from Antarctic, and those spherules turned out to be extraterrestrial in origin. However, it was shown that there was little difference in characteristics of elemental contents between both kinds of spherules, except for Ir-detected spherules.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)