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サンゴ骨格の微小領域における化学組成の不均質性 : 石灰化プロセスの解明とサンゴ古水温計への応用 (<特集>サンゴ年輪と低緯度の海洋環境)

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Title: サンゴ骨格の微小領域における化学組成の不均質性 : 石灰化プロセスの解明とサンゴ古水温計への応用 (<特集>サンゴ年輪と低緯度の海洋環境)
Other Titles: Heterogeneity of chemical compositions in coral skeletons : Investigation of skeletal calcification and implications for coral thermometer (<Special Section>Coral annual bands and ocean environments in the low latitude)
Authors: 渡邊, 剛1 Browse this author →KAKEN DB
Juillet-Leclerc, Anne2 Browse this author
Cuif, Jean-Pierre3 Browse this author
Meibom, Anders4 Browse this author
Dauphin, Yannicke5 Browse this author
Blamart, Dominique6 Browse this author
佐野, 有司7 Browse this author
Authors(alt): WATANABE, Tsuyoshi1
Juillet-Leclerc, Anne2
Guif, Jean Pierre3
Meibom, Anders4
Dauphin, Yannicke5
Blamart, Dominique6
SANO, Yuji7
Keywords: Coral skeletons
oxygen isotope
Strontium/calcium ratio
centres of calcification
secondary Ion Mass Spectrometry (SIMS)
Issue Date: 27-Dec-2004
Publisher: 日本地球化学会
Journal Title: 地球化学
Volume: 38
Issue: 4
Start Page: 255
End Page: 264
Abstract: Massive corals have been widely used as proxies for past changes in sea surface temperature (SST) of the tropical and subtropical oceans because the oxygen isotopic (δ^<18>O) and strontium/calcium (Sr/Ca) ratios of their aragonitic skeletons are believed to vary quantitatively as a function of the temperature of the ambient sea water. However, recent microanalytical studies using secondary ion mass spectrometry (SIMS) have revealed large chemical heterogeneities for Sr/Ca and oxygen isotopic ratios in coral skeleton, which cannot be explained by temperature variation. The newly developed NanoSIMS has a potential to determine chemical variations within the two basic building blocks of the coral skeleton; centres of calcification and fibers. Such data can provide important new information about the biomineralization process and help constrain the degree to which temperature and/or biological processes affect the composition of skeleton in corals, as well as in biogenetic carbonates formed by other marine organisms.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡邊 剛

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