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The influence of extractable organic matter on vitrinite reflectance suppression: A survey of kerogen and coal types

International Journal of Coal Geology

By:
, ,
DOI: 10.1016/j.coal.2006.03.005

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Abstract

The vitrinite reflectance suppression literature shows that while bitumen impregnation of the vitrinite group is often invoked as a significant contributor to suppression, its existence is not often supported by petrological evidence. This study examines bitumen impregnation as a factor in vitrinite suppression by comparing the vitrinite reflectance of source rock and coal samples before and after solvent-extraction. Bitumen, often defined as organic matter soluble or extractable in certain organic solvents, should be removed by Soxhlet method solvent extraction using chloroform. Removing the extractable bitumen should restore the suppressed reflectance to its true higher value. However, the solvent extracted samples averaged 0.014% Rv less than that of the unextracted samples. We conclude from these results and from other published data that reflectance suppression by bitumen impregnation in the vitrinite maceral group, above the huminite stage of gelification, is seemingly a rare phenomenon and whose effect on suppressing vitrinite reflectance is typically negligible. ?? 2006.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The influence of extractable organic matter on vitrinite reflectance suppression: A survey of kerogen and coal types
Series title:
International Journal of Coal Geology
DOI:
10.1016/j.coal.2006.03.005
Volume
70
Issue:
1-3 SPEC. ISS.
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
International Journal of Coal Geology
First page:
67
Last page:
78
Number of Pages:
12