Advertisement

Journal of Radioanalytical Chemistry

, Volume 71, Issue 1–2, pp 285–297 | Cite as

Geochemical investigation of the Witbank coalfield using instrumental neutron activation analysis

  • R. J. Hart
  • R. Leahy
  • R. M. Falcon
Fossil Fuels

Abstract

The No. 2 coal seam of the Witbank basin, South Africa, has a well defined geological layering that extends laterally over most of the basin. Palaeoenvironmental studies indicate that the No. 2 seam accumulated in two distinct depositional environments: glaciofluvial channels and regions represented by transgressive marine sediments. A systematically selected suite of samples was collected to study the distribution of trace elements both laterally and vertically across the No. 2 seam. A total of 121 coal samples were analysed for 15 trace elements by instrumental neutron activation analysis. Detailed trace element profiles across the No. 2 seam indicate that trace elements associated with the inorganic minerals in coal reflect vertical changes in the clastic source areas, environments of precipitation and accumulation or intrusive mineralisation in the post-peat swamp phases of the No. 2 seam. Trace elements associated with the organic matter in coal relate to changes in the palaeoenvironment or possible plant associations. Variation in the concentration of Br across the Witbank basin reflect regional changes in the depositional environment. In turn the chemical nature of the depositional environment strongly effects the distribution of some trace elements among maceral groups.

Keywords

Coal Seam Instrumental Neutron Activation Analysis Depositional Environment Coal Sample Vitrinite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    P. ZUBOVIC, in GOULD (Ed.), Coal Science: Washington D. C. American Chemical Society publications, Advances in Chemistry, Vol. 55 (1966) p. 221.Google Scholar
  2. 2.
    V. M. GOLDSCHMIDT, Inst. Eng. Chem., 27 (1935) 1101.Google Scholar
  3. 3.
    R. M. S. FALCON, Coal in South Africa, Part 11. Minerals Sci. Engng., 10 (1978) 28.Google Scholar
  4. 4.
    G. LE BLANC SMITH, Unpublished Ph. D. Thesis to the University of the Witwatersrand, Johannesburg (in press).Google Scholar
  5. 5.
    C. S. ERASMUS, H. W. FESQ, E. J. D. KABLE, S. E. RASMUSSEN, J. P. F. SELLSCHOP, J. Radioanal. Chem., Chem., 39 (1977) 323.CrossRefGoogle Scholar
  6. 6.
    J. J. ROWE, E. STEINNES, J. Radioanal. Chem., 37 (1977) 849.CrossRefGoogle Scholar
  7. 7.
    J. N. WEAVER, Anal. Methods for Coal and Coal Production, 1 (1978) 377.Google Scholar
  8. 8.
    H. J. GLUSKOTER, R. R. RUCH, W. G. MILLER, R. A. CAHILL, G. B. DREHER, J. K. KUHN, Illinois State Geological Survey circular 499 (1977) p. 1.Google Scholar
  9. 9.
    R. J. HART, R. M. LEAHY, Intern. Conf. on Applied Mineralogy, 1981.Google Scholar
  10. 10.
    L. A. GULYAYEVA, E. S. ITKINA, Geokhimiya, 4 (1962) 337.Google Scholar

Copyright information

© Akadémiai Kiadó 1982

Authors and Affiliations

  • R. J. Hart
    • 2
  • R. Leahy
    • 1
  • R. M. Falcon
    • 1
  1. 1.Nuclear Physics Research UnitUniversity of the WitwatersrandJohannesburg(South Africa)
  2. 2.SA Atomic Energy BoardPelindaba(South Africa)

Personalised recommendations