Megascopic and microscopic characteristics of a domed peat deposit in Sarawak, Malaysia were examined to test their analogy to "dulling up" sequences in low-ash coal beds. Preliminary petrographic results show high concentrations (> 95%) of vitrinite precursor material for all peat types, but that fibrous peats in the upper central portion of the deposit contain more preserved plant material than peats toward the base and margins which, although more decomposed, contain large fragments (5-150 cm) of wood. These results present contradictory evidence in support of a dulling up model and suggests that modern tropical peat domes are perhaps poor petrographic analogues for dulling up sequences. This deposit would produce an "all bright" coal seam with bright vitrain bands of variable thickness and amount, set in bright, high vitrinite matrix. © 1989.
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- Authors: Esterle, J.S., Ferm, J.C., Yiu-Liong, T.
- Author Affiliation: University of Kentucky
- Subjects: tropics, peat, dome, coal beds
- Publication type: Journal Article
- Source: Organic Geochemistry 14(3): 333-342
- Year: 1989
- DOI: https://doi.org/10.1016/0146-6380(89)90060-0
