Answers are grounded in this paper and cite their sources.
Analysis reveals dominant huminite in coal from Balikpapan, indicating a lignite to sub-bituminous rank.
This study aims to characterize the maceral composition and determine the rank of coal from the Kampungbaru Formation in the South Balikpapan area based on organic petrography analysis. Coal samples were analyzed using reflectance microscopy to identify and quantify maceral components and measure vitrinite reflectance. The analysis results indicate that the huminite maceral group dominates the coal composition (60.7-84.6%), followed by liptinite (9.8-27.5%), and low inertinite (5.6-11.8%). Vitrinite reflectance ranges from 0.30-0.33%, indicating that the coal is in the lignite to sub-bituminous rank. This low coal rank reflects rapid deposition conditions and an anoxic to suboxic environment that inhibits the complete decomposition of organic matter.
No takes yet. Share an insight, caveat, or question.
Jamaluddin et al. (2025) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: