2007 Fiscal Year Final Research Report Summary
Decoding the History o the Earth, Part II
| Project/Area Number |
15104008
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
MARUYAMA Shigenori Tokyo Institute of Technology, Graduate School of Science, Professor (50111737)
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| Co-Investigator(Kenkyū-buntansha) |
YURIMOTO Hisayoshi Hokkaido University, Natural History Sciences, Professor (80191485)
NAKASHIMA Satoru Osaka University, Department of Earth and Space Science, Professor (80237255)
ISOZAKI Yukio The University of Tokyo, Dept. Earth Science & Astronomy, Professor (90144914)
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| Project Period (FY) |
2003 – 2007
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| Keywords | environmental change / petrology, mineralogy, and economic ore / geology / stratigraphy and paleontology / origin and evolution of planet |
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| Research Abstract |
Summary of this work is as follows : 1 Descriptive works (number of papers ; 32 by Maruyama, 9 by Isozaki, 8 by Nakashima and 8 by Yurimoto), 2 Synthetic works (Maruyama ; Dynamics of plumes and superplumes through time, in Superplumes ; Beyond plate tectonics, Springer, 441-502 ; Isozaki ; Plume winter scenario for Biosphere catastrophe, ibid, 409-439, Springer), 3 Detailed fossil and geochemical analysis for P/T boundary, end Proterozoic and end Archean times using drilled cores (5 papers by Isozaki, 2 papers by Nakashima, Yurimoto and Maruyama), 4 SIMS spot analysis for the oldest fossils at 3.56Ga from W. Australia (unpublished by Yurimoto), 5 New discrimination diagram for the type of bacteria by Nakashima (in prep.). Most of these descriptions can be interpreted by the secular cooling of the Earth, but not all. One of the exciting events might be starburst in our Galaxy, and resultant cosmic radiation which may have evolved life in genome level.
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