Sulphur Concentration in the Japanese Palaeogene Coal

  1. R. A. Rahmani and
  2. R. M. Flores
  1. Toshio Shimoyama

Published Online: 28 APR 2009

DOI: 10.1002/9781444303797.ch21

Sedimentology of Coal and Coal-Bearing Sequences

Sedimentology of Coal and Coal-Bearing Sequences

How to Cite

Shimoyama, T. (1985) Sulphur Concentration in the Japanese Palaeogene Coal, in Sedimentology of Coal and Coal-Bearing Sequences (eds R. A. Rahmani and R. M. Flores), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303797.ch21

Author Information

  1. Mitsui Coal Mining Company Ltd, Muromachi 2-1, Nihonbashi, Tokyo 103, Japan

Publication History

  1. Published Online: 28 APR 2009
  2. Published Print: 26 MAR 1985

ISBN Information

Print ISBN: 9780632012862

Online ISBN: 9781444303797

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Keywords:

  • sulphur concentration in the Japanese Palaeogene coal;
  • peat-forming stage, owing to marine influence;
  • Shiramizu Group, representing coal-bearing sequence;
  • Ishikari coal field - Sorachi in the north and Yubari in the south;
  • Akasaki, Omuta, and Manda Groups, representing Palaeogene deposits in Miike coal field

Summary

The sulphur content in various Japanese Palaeogene coalfields was investigated. It varied between 7 and 0.2%, although most samples had less than 0.5%. No correlation was observed between total sulphur content and degree of coalification, suggesting sulphur incorporation in the peat-forming stage. The highest sulphur content was found in the Miike coalfield where the coal beds are directly overlain by marine sandstone, and the lowest sulphur content was found in the Kado coal field which was formed in a limnic environment. Three modes of vertical distribution of sulphur were observed in the three coal beds in the Miike coal field: (1) high sulphur concentration at the top of the bed; (2) high sulphur concentration at the top and bottom; and (3) no variation through the vertical section. These increases in sulphur are attributed to seawater infiltration largely from the overlying marine strata and partly from the underlying marine strata. The iron incorporated with sulphur in the beds was originally derived from nearby lateritic profiles.

There is an inverse relation of total sulphur contents to intervals between coal beds and overlying marine to brackish-water zones. It is suggested that seawater accessibility to the original peat from neighbouring marine sediments plays an important role in the increase of sulphur content in Japanese Palaeogene coal.