An alternative method for sampling and petrographically characterizing an Eocene coal bed, southeast Kalimantan, Indonesia
A study undertaken on an Eocene age coal bed in southeast Kalimantan, Indonesia determined that there was a relationship between megascopically determined coal types and kinds and sizes of organic components. The study also concluded that the most efficient way to characterize the seam was from collection of two 3 cm blocks from each layer or bench defined by megascopic character and that a maximum of 125 point counts was needed on each block. Microscopic examination of uncrushed block samples showed the coal to be composed of plant parts and tissues set in a matrix of both fine-grained and amorphous material. The particulate matrix is composed of cell wall and liptinite fragments, resins, spores, algae, and fungal material. The amorphous matrix consists of unstructured (at 400x) huminite and liptinite. Size measurements showed that each particulate component possessed its own size distribution which approached normality when transformed to a log{sub 2} or phi scale. Degradation of the plant material during peat accumulation probably controlled grain size in the coal types. This notion is further supported by the increased concentration of decay resistant resin and cell fillings in the nonbanded and dull coal types. In the sampling design experiment, two blocks from each layer and two layers from each coal type were collected. On each block, 2 to 4 traverses totaling 500 point counts per block were performed to test the minimum number of points needed to characterize a block. A hierarchical analysis of variance showed that most of the petrographic variation occurred between coal types. The results from these analyses also indicated that, within a coal type, sampling should concentrate on the layer level and that only 250 point counts, split between two blocks, were needed to characterize a layer.
- Research Organization:
- Kentucky Univ., Lexington, KY (USA)
- OSTI ID:
- 5981316
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
PETROGRAPHY
COAL DEPOSITS
EXPLORATION
INDONESIA
ALGAE
CELL WALL
COAL RANK
COAL SEAMS
CORRELATIONS
DISTRIBUTION
EOCENE EPOCH
EXINITE
FOSSILS
FUNGI
MACERALS
MEASURING METHODS
MICROSCOPY
ORGANIC MATTER
PALEONTOLOGY
PARTICLE SIZE
PEAT
PLANT TISSUES
PLANTS
RESINS
SAMPLING
SPORES
ASIA
BODY
CARBONACEOUS MATERIALS
CELL CONSTITUENTS
CENOZOIC ERA
DEVELOPING COUNTRIES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
ISLANDS
MATERIALS
MINERAL RESOURCES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RESOURCES
SIZE
TERTIARY PERIOD
TISSUES
011000* - Coal
Lignite
& Peat- Reserves
Geology
& Exploration
010600 - Coal
Lignite
& Peat- Properties & Composition