![]() ![]() This section might be derived from sapric or fine hemic peat often occurring at the base of modern peats. ![]() The basal section of the studied coal seams is represented typically by the humodetrinite–liptinite-rich group. ![]() Comparing the distribution of maceral assemblages to the maceral or pre-maceral assemblages in modern tropical domed peat in Indonesia reveals many similarities. Minerals are found only in small amounts (0–2 vol.%) mostly as iron sulfide.Based on maceral assemblages, the coals can be grouped into five classes: (1) humotelinite-rich group, (2) humodetrinite-rich group, (3) humocollinite-rich group, (4) inertinite-rich group and (5) humodetrinite–liptinite-rich group. The studied low rank coals have a mean random huminite reflectance between 0.35% and 0.46% and are dominated by huminite (34.6–94.6 vol.%). Results of an organic petrography study on coals from Tanjung Enim, South Sumatra Basin are reported. The South Sumatra basin is among the most important coal producing basins in Indonesia. ![]()
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