Megascopic description of coal with particular reference to seams in southern Illinois

Conference · Sun Jan 01 04:00:00 EST 1978 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:6317707

Cameron, A R

Polished column samples representing the Davis, Dekoven, No. 5, and No. 6 seams of southern Illinois were studied megascopically. The lithotypes identified were vitrain, clarain (bright and dull), durain, and fusain. Partings also were determined. Layers on the polished surfaces were identified down to a thickness of 1 mm. On the basis of these data, the seams were divided into petrographically distinctive intervals which were characterized as bright, semibright, semidull, and dull, depending upon the proportions of vitrain and bright clarain present. A comparison of profiles suggested that each seam has its own characteristic pattern and that this pattern has lateral persistence as indicated by the No. 6 seam profiles. A comparison of polished column data with in-situ descriptions for the No. 6 seam was less satisfactory, revealing only general similarities. Maceral contents determined on a number of the megascopically identified layers from two of the columns studied showed wide ranges for some of the lithotypes, particularly bright and dull clarain and durain, even though mean maceral contents increased and decreased according to predictable patterns. Mineral matter appear to be a major factor in decreasing the luster of some layers resulting in their assignment to durain and dull clarain.

• Research Organization: Geological Survey of Canada, Calgary, Alberta
• OSTI ID: 6317707
• Report Number(s): CONF-7609206-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: 661
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
011000* -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
COAL DEPOSITS
EVALUATION
EXPLORATION
GEOLOGIC DEPOSITS
GEOLOGY
GREAT LAKES REGION
ILLINOIS
LITHOLOGY
MACERALS
MINERALS
NORTH AMERICA
OPTICAL PROPERTIES
PETROLOGY
PHYSICAL PROPERTIES
REFLECTIVITY
RESOURCES
SAMPLING
SURFACE PROPERTIES
USA