セディメントトラップのAlの存在状態が示す珪藻ケイ酸殻中のAlの存在とその地球化学的意味

赤木 右; 江本 真理子; 横山 拓史

doi:10.14862/geochemproc.63.0_148

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.63.0_148

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Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

27Al-MAS NMR studies of sediment trap samples collected from the diatom-productive Bering Sea

*Tasuku Akagi, Mariko Emoto, Takushi Yokoyama

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Keywords: diatom frustules, aluminum, rare earth elements, speciation, NMR

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Pages 148-

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Abstract

Speciation of Al in sediment-trap samples collected from the Bering Sea was made using 27Al-MAS NMR. Chemical leaching disclosed that more than 80% of Al was siliceous. The spectra of sediment-trap samples resembled that of the cultivated diatoms with Al ions being doped. This study implies the presence of biogenic Al in diatom frustules. Geochemical implication of the presence will be discussed.

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