Diagenetic trends of a tertiary low-rank coal series |
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Authors: | Jean-Paul Boudou Bernard Durand Jean-Louis Oudin |
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Affiliation: | 1. Université d''Orléans C.N.R.S., E.R.A. 601, 45046 OrléansFrance;2. Institut Français du Pétrole, B.P. 311, 92506 Rueil-MalmaisonFrance;3. Compagnie Française des pétroles, Laboratoire de Bordeaux, 218-228, Avenue du Haut-Lévêque, 33605 Pessac Cedex France |
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Abstract: | The Mahakam delta (Kalimantan, Indonesia) coals represent all the evolution stages between freshly-deposited plant/peat material, lignites and bituminous coals. The geochemical techniques used to study this coal series included elemental analysis, extraction of humic compounds, infrared spectroscopy and 13C nuclear magnetic resonance of the total coal.The main mechanisms of early maturation in this series are loss of oxygenated compounds, aromatisation and condensation of the organic matter. These changes, which have already been suggested for other coal series and partially reported for sedimentary organic matter, were confirmed and described in more detail for the Mahakam coal series. |
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