Research Project
Grant-in-Aid for Young Scientists (B)
Cosmic spherules are subspherical to spherical particles of <1 mm diameter which are produced by melting of interplanetary dust and large objects during atmospheric entry. Although cosmic spherules are known principally from the ice sheets of polar regions and Cenozoic deep-sea sediments, a few spherules older than Mesozoic were recovered from the sedimentary rocks of pelagic limestone and radiolarian chert. The cosmic spheres from these sedimentary rocks contain atmospheric oxygen, and their final oxidation state is determined by the past oxygen content of the atmosphere. Systematic studies of ancient cosmic spherules in the sedimentary rocks could detect long-term changes in the past oxygen partial pressure of the atmosphere.
All 2014 2013 2012 2011 Other
All Journal Article (16 results) (of which Peer Reviewed: 14 results) Presentation (43 results) (of which Invited: 6 results) Book (2 results) Remarks (2 results)
地質学雑誌
Volume: (採録決定済)
130005077718
Nature Communications
Volume: 4 Issue: 1 Pages: 2455-2455
10.1038/ncomms3455
科学
Volume: 83 Pages: 1321-1323
日本地質学会News
Volume: 16 Pages: 9-9
Proceedings of the National Academy of Sciences of the United States of America
Volume: 109 Pages: 19134-19139
Geophysical Journal International
Volume: 189 Pages: 1383-1398
Facies
Volume: 58 Pages: 113-130
120005324449
Geology
Volume: 39 Pages: 567-570
Proc. Natl. Acad. Sci. USA
Volume: 109 Issue: 47 Pages: 19134-19139
10.1073/pnas.1209486109
Volume: In press Issue: 3 Pages: 1383-1398
10.1111/j.1365-246x.2012.05462.x
Volume: 58 Issue: 4 Pages: 671-684
10.1007/s10347-012-0305-5
Volume: 1 Pages: 113-130
Marine Micropaleontology
Volume: 79 Pages: 58-65
Micropaleontology
Volume: 57 Pages: 93-124
Volume: 39 Issue: 6 Pages: 567-570
10.1130/g31866.1
http://www.sci.kumamoto-u.ac.jp/~onoue/