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Paul Hackley
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Photomicrograph Atlas
Sporinite in Metallurgical Bituminous Coals
Sporinite: A liptinite maceral exhibiting various lenticular, oval, or round forms that reflect the cross-sectioning of a flattened, hollow, ovoid body; sometimes exhibits rod-like projections that are small relative to the size of the total body (ASTM 2008).
Representative examples of macerals are labeled on each photomicrograph. Click on the thumbnail images for a larger and more detailed view. Use the "back" button on your browser to return to the Atlas:
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include sporinite, vitrinite, micrinite, and inertodetrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include sporinite and inertodetrinite. |
Photomicrograph of borderline high volatile A – medium volatile bituminous coal from West Virginia with a mean maximum reflectance of 1.15%. Macerals shown include sporinite, inertodetrinite, and semifusinite. |
| Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. The liptinite maceral shown is sporinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include sporinite, vitrinite, micrinite, and inertodetrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include sporinite, vitrinite, micrinite, and inertodetrinite. |
| Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include sporinite, vitrinite, and micrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include sporinite, vitrinite, and fusinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.88%. Macerals shown include sporinite, vitrinite, micrinite, and inertodetrinite. |
| Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 1.04%. Macerals shown include sporinite, vitrinite, and micrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 1.04%. Macerals shown include sporinite and inertodetrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 1.04%. Macerals shown include sporinite, vitrinite, and fusinite. |
Return to Photomicrograph Atlas index
Reference
American Society for Testing and Materials (ASTM), 2008, D 2799-05a Standard Test Method for Microscopical Determination of the Maceral Composition of Coal: Annual Book of ASTM Standards, Petroleum Products, Lubricants, and Fossil Fuels, v.05.06, Gaseous Fuels; Coal and Coke, [p 349-352].
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 RECENT PUBLICATIONS
Thermal maturity and organic composition of Pennsylvanian coals and carbonaceous shales, north-central Texas: implications for coalbed gas potential, (2009): International Journal of Coal Geology
Outside Publication - Request copy, email author.
RELATED LINKS
ASTM Subcommittee D05.28 on Petrographic Analysis of Coal and Coke:
Non-USGS Website
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U.S. Department of the Interior |
U.S. Geological Survey
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