1992 Fiscal Year Final Research Report Summary
Analysis of formation of clastic sediments based on the linear model.
| Project/Area Number |
03640640
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
地質学一般
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| Research Institution | Nagoya University |
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Principal Investigator |
MIZUTANI Shinjiro Nagoya University School of Science Professor, 理学部, 教授 (50022538)
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| Project Period (FY) |
1991 – 1992
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| Keywords | Size composition / silt grain / roundness / depositional environment / mixing process / linear model / probability paper / mixed material |
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| Research Abstract |
The followings are found: 1) An idea that the size distribution of clastic sediments shows a log-normal distribution is surely empirical, and has no theoretical basis. 2) The probability paper is used only conveniently for the size analysis and statistical study. 3) Mixing process of several fundamental populations is represented more clearly by a linear model. 4) Silt-sized grain is always low in roundness, and is of cataclastic origin rather than of epiclastic one. 5) Heavy minerals, as finger-print for provenance analysis, are usually accumulated in siltstone and the like. 6) Silt and siltstone, together with the loess and loessite, are important for the study of the depositional environment particularly in a global scale. The rocks are probably related with the glacial age and glacial deposits, and hence with the clamatic condition of the earth history.
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