Sr thermometer for Porites coral: Little need to measure Ca?

この論文にアクセスする

この論文をさがす

著者

抄録

Cubic sub-samples of 1 mm<sup>3</sup> (about 0.5 mg) were obtained from a <i>Porites</i> coral slice collected from Xisha Island, South China Sea and analysed for Sr and Ca concentrations by ID-TIMS after precise weighing. Ca contents in the coral are quite uniform (mean = 38.16 wt%, 2σ = 0.11 wt%). The variation corresponds to ±0.4°C, about the level of uncertainty of the Sr/Ca-SST calibration. Sr concentrations and Sr/Ca ratios covary linearly, and the line can be defined by the equation Sr/Ca × 10<sup>3</sup> = 0.111Sr - 0.5061 (correlation coefficient <i>r</i> = 0.9955), where Sr is in μmol/gm. Consequently, our results demonstrate that the previously established coral Sr/Ca thermometer, Sr/Ca × 10<sup>3</sup> = A + B × T, can be simplified as a Sr thermometer, 0.111Sr - 0.5061 = A + B × T, where Sr is in μmol/gm. Therefore, measurement of Ca in corals could be unnecessary. If different levels of impurity exist in different corals, a few Ca measurements in each coral may be needed, but definitely there is no need to measure every sub-sample.

収録刊行物

  • Geochemical journal : journal of the Geochemical Society of Japan

    Geochemical journal : journal of the Geochemical Society of Japan 33(5), 351-354, 1999-10-01

    GEOCHEMICAL SOCIETY OF JAPAN

参考文献:  16件中 1-16件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10008804389
  • NII書誌ID(NCID)
    AA00654975
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    00167002
  • NDL 記事登録ID
    4871818
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z53-R488
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ