2015 Fiscal Year Final Research Report
Molecular/atomic-level analysis of metal-bearing compounds for in-situ proxy of marine biogeochemical cycling
| Project/Area Number |
26610187
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geochemistry/Cosmochemistry
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| Research Institution | The University of Tokyo (2015)
Japan Agency for Marine-Earth Science and Technology (2014) |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 有機金属化合物 |
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| Outline of Final Research Achievements |
The amount of bioessential metals play a key role in marine biogeochemical processes as a limiting factor for vital reactions. Quantitative analysis of metal-bearing compounds may be able to indicate in situ proxy for biological activity. I measured down-core data of bioessential metals (Fe, An, Cu, Mn, Mo), and radiogenic Sr isotope ratios in a Quaternary sediment core recovered from the West Caroline Basin in the western equatorial Pacific. Following chromatographic separation of lipid, protein, and pigment fractions, metal concentrations were measured with a quadrupole inductively coupled plasma mass spectrometer. I also measured dense benthic microbial mat of solar salterns which harbor surprisingly diverse microorganisms. The in situ geochemical signatures and sediment fabrics of salt deposits allows proposing a past depositional environment with marked impact on the benthic biota of the depositional basin.
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| Free Research Field |
地球化学
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