2015 Fiscal Year Final Research Report
Establishment of new index showing the biogeneity of microbialite
| Project/Area Number |
25800280
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geology
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| Research Institution | Hiroshima University |
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Principal Investigator |
Shiraishi Fumito 広島大学, 理学(系)研究科(研究院), 助教 (30626908)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 微生物堆積物 |
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| Outline of Final Research Achievements |
While biogeneity of microbialite is identified by mainly its morphology and fabric, similar characteristics are also formed by inorganic processes. The present study, therefore, tried to find out and apply the indicator of biogeneity. Following results were obtained: 1) chemical property of cyanobacterial extracellular polymeric substances is crucial for the formation of carbonate microbialite, 2) mineralogical features of biogenic origin were found from ferromanganese nodule formed in the abyssal seafloor, 3) phosphate stromatolite formed after the snowball earth is considered to be the initial product of microbial activity.
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| Free Research Field |
炭酸塩堆積学
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