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Luo Shangde, Wang Lei, Huang Yipu. RELATIONSHIP BETWEEN ACCRETION OF MANGANESE NODULES AND SEDIMENTARY ENVIRONMENTS[J]. Acta Sedimentologica Sinica, 1989, 7(4): 77-84.
Citation: Luo Shangde, Wang Lei, Huang Yipu. RELATIONSHIP BETWEEN ACCRETION OF MANGANESE NODULES AND SEDIMENTARY ENVIRONMENTS[J]. Acta Sedimentologica Sinica, 1989, 7(4): 77-84.

RELATIONSHIP BETWEEN ACCRETION OF MANGANESE NODULES AND SEDIMENTARY ENVIRONMENTS

  • Received Date: 1987-07-28
  • Publish Date: 1989-12-10
  • 48 data sets on the major chemical compositions (Mn and Fe concentrations) and growth rates of manganese nodules from different sedimentary environments of the oceans have been collected and their fluxes of manganese and iron have been calculated. It has been shown that although the chemical compositions and growth rates of manganese nodules from different areas of the oceans are largely different ( Mn: 11.3-44.9% ; Fe: 0.724-20.5% ; growth rates; 0.8O-2OOmm/106yr) , there are small differences in Fe fluxes (10-102mg Fe/cm2 ? 106yr at most) but large one in Mn fluxes (in range of 10 to 104mg Mn/cm2 ? 106yr) , reflecting that the diagenetic reactivity of manganese is much stronger than that of iron in marine environments. It has been demonstrated by statistical analyses the (I) the concentrations of manganese and iron of individual nodules are correlative positively for the nodules with the Mn /Fe ratios of ?1 but negatively for those with high Mn /Fe ratios becauce of different contribution of diagenetic manganese; (2) The relationships of Mn fluxes to Fe fluxes or Mn /Fe ratios of the manganese nodules are dependent on classification of sedimentary environments, but the changes of Mn fluxes and Mn /Fe ratios caused only by diagenetic processes are linearly correlative, independent on the classification of sedimentary environments. The following equation, derived from the correlation of Mn fluxes to Mn /Fe ratios of manganese modules, can be used to predict the growth rates from the Mn concentrations and Ma/Fe ratios of the nodules and reveal the importance of sedimentary environments to the chemical composition and growth rate of manganese nodules: S(mm/106yr) =[52.0(Mn/Fe-0.6O)125+ 10]/[Mn]
  • [1] Dyraond J. and Lyle M. et al., 1984, Gcochim.Cosmochira.Acta 48, p.931-949.
    [2] Finney B., Health G.R. and Lylcr M., 1984, Gcochim.Cosmochira.Acta 48, p.911-917.
    [3] Heye D. and Marchig V., 1977, Mar.Geol.23, M19-M25.
    [4] Huh C.A.and Ku T.L., 1984, Geochim.Cosraochim.Acta 48, p.951-963.
    [5] Krishnaswami S. and Lal D., 1972, Manganese nodules and Budget of trace soluble in the oceans, In: The Changing Chemistry of the Oceans, Noble Symposium 20 (eds.D.Dyrsscn and Tagner), New York, Wiley Interscience.
    [6] Ku T.L.1977, Rates of accretion, In: Marine Manganese Deposits (ed. G.P.Glasby).
    [7] Kusakabc M. and Ku T.L. 1984, Geochim.Cosmochira.Acta 48, 2187-2193.
    [8] Lyle M., 1982, Gcochim.Cosmochira.Acta, 46, p.2301-2306.
    [9] Mero J.M. 1965, The Mineral Resources of the Sea, Amsterdam, Elsevier.
    [10] Moore W.S.et al., 1981, Earth Planet.Sci. lett.52, p.151-171.
    [11] Reyss J.L.et al., 1982, Nature 295, p.401-403.
    [12] Somayajulu B.L.K. et al., 1971, Geochim.Cosraochim.Acta, 35, p.621-624.
    [13] Tsunogai S., et al. 1982, Geochcm. J.16, p.199-212.
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  • Received:  1987-07-28
  • Published:  1989-12-10

RELATIONSHIP BETWEEN ACCRETION OF MANGANESE NODULES AND SEDIMENTARY ENVIRONMENTS

Abstract: 48 data sets on the major chemical compositions (Mn and Fe concentrations) and growth rates of manganese nodules from different sedimentary environments of the oceans have been collected and their fluxes of manganese and iron have been calculated. It has been shown that although the chemical compositions and growth rates of manganese nodules from different areas of the oceans are largely different ( Mn: 11.3-44.9% ; Fe: 0.724-20.5% ; growth rates; 0.8O-2OOmm/106yr) , there are small differences in Fe fluxes (10-102mg Fe/cm2 ? 106yr at most) but large one in Mn fluxes (in range of 10 to 104mg Mn/cm2 ? 106yr) , reflecting that the diagenetic reactivity of manganese is much stronger than that of iron in marine environments. It has been demonstrated by statistical analyses the (I) the concentrations of manganese and iron of individual nodules are correlative positively for the nodules with the Mn /Fe ratios of ?1 but negatively for those with high Mn /Fe ratios becauce of different contribution of diagenetic manganese; (2) The relationships of Mn fluxes to Fe fluxes or Mn /Fe ratios of the manganese nodules are dependent on classification of sedimentary environments, but the changes of Mn fluxes and Mn /Fe ratios caused only by diagenetic processes are linearly correlative, independent on the classification of sedimentary environments. The following equation, derived from the correlation of Mn fluxes to Mn /Fe ratios of manganese modules, can be used to predict the growth rates from the Mn concentrations and Ma/Fe ratios of the nodules and reveal the importance of sedimentary environments to the chemical composition and growth rate of manganese nodules: S(mm/106yr) =[52.0(Mn/Fe-0.6O)125+ 10]/[Mn]

Luo Shangde, Wang Lei, Huang Yipu. RELATIONSHIP BETWEEN ACCRETION OF MANGANESE NODULES AND SEDIMENTARY ENVIRONMENTS[J]. Acta Sedimentologica Sinica, 1989, 7(4): 77-84.
Citation: Luo Shangde, Wang Lei, Huang Yipu. RELATIONSHIP BETWEEN ACCRETION OF MANGANESE NODULES AND SEDIMENTARY ENVIRONMENTS[J]. Acta Sedimentologica Sinica, 1989, 7(4): 77-84.
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