南西諸島第四紀石灰岩中のカドミウム含量  [in Japanese] Concentration of cadmium in Quaternary limestones of the Nansei Islands, southwest Japan  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

Cadmium contents of limestone samles were determined by flame atomic absorption spectrometry combined with ammonium pyrrolidinedithiocarbamate (APDC)-4-methyl-2-pentanone (MIBK) solvent extraction system. The Cd contents of Quaternary limestones occurring in the Nansei Islands are independent of the amount of impurities such as silicates or oxides, the fact suggesting that Cd<sup>2+</sup> may be directly incorporated into calcite by replacing Ca<sup>2+</sup> in the lattice. The geometric mean and the median of Cd in the present samples (n =94) are both 0.07_1ppm, which is quite similar to Mason and Moore's value (0.09ppm) of this element in carbonate rocks. The Cd contents of Quaternary limestones may be largely controlled by the concentration of this element in aragonite, high-Mg calcite and low-Mg calcite in unconsolidated carbonate sediments which are the precursor of these limestones. During the formation of pure Quaternary limestones, Cd seems to behave together with Zn. However, the observed enrichment of Cd relative to Zn in these limestones might be caused through the above replacement mechanism.

Journal

  • Chikyukagaku

    Chikyukagaku 26(1), 17-23, 1992

    The Geochemical Society of Japan

Cited by:  1

Codes

  • NII Article ID (NAID)
    110008679861
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0386-4073
  • NDL Article ID
    3780382
  • NDL Source Classification
    ME51(鉱物・鉱床)
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    CJPref  NDL  NII-ELS  J-STAGE 
Page Top