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–  [in Japanese] Heterogeneity of chemical compositions in coral skeletons: Investigation of skeletal calcification and implications for coral thermometer  [in Japanese]

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Author(s)

    • 渡邊 剛 WATANABE Tsuyoshi
    • フランス国立科学研究所|(現) 北大院理・地理惑星 Laboratoire de Sciences du Climat et de l'Environment Laboratoire Mixte CNRS-CEA, Domaine du CNRS|(Present address) Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
    • Meibom Anders
    • スタンフォード大学地質環境科学 Geological and Environmental Sciences, Stanford University
    • Dauphin Yannicke
    • パリ第11大学理学部 Faculte des Sciences, Universite de paris XI
    • Blamart Dominique
    • フランス国立科学研究所 Laboratoire de Sciences du Climat et de l'Environment Laboratoire Mixte CNRS-CEA, Domaine du CNRS
    • 佐野 有司 SANO Yuji
    • 東京大学海洋研究所 Center for Environmental Research, Ocean Research Institute, The University of Tokyo

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<sup>18</sup>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.

Journal

  • Chikyukagaku

    Chikyukagaku 38(4), 255-264, 2004

    The Geochemical Society of Japan

References:  48

Codes

  • NII Article ID (NAID)
    110008680083
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0386-4073
  • NDL Article ID
    7212975
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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