|
 ENERGY PROGRAM NEWSLETTER
CONTACT
Paul Hackley
Lead Geologist
703.648.6458
Sharon Swanson
Lead Geologist
703.648.6453
Peter Warwick
Lead Geologist
703.648.6469
Laboratory Phone
703.648.6467
|
|
|
Photomicrograph Atlas
Micrinite in Metallurgical Bituminous Coals
Micrinite: An inertinite maceral, generally nonangular, exhibiting no relict plant cell wall structure, smaller than 10 um and most commonly occurring as particles around 1- to 5-um diameter (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 low volatile bituminous coal from West Virginia with a mean maximum reflectance of 1.67%. Macerals shown include micrinite and vitrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, sporinite, inertodetrinite, and semifusinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, sporinite, inertodetrinite, and semifusinite. |
| Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, and sporinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, 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 micrinite, vitrinite, sporinite, and inertodetrinite. |
| Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, sporinite, and inertodetrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, sporinite, and inertodetrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include micrinite, vitrinite, sporinite, cutinite, and inertodetrinite. |
| Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals include micrinite, vitrinite, sporinite, and inertodetrinite. |
Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 1.04%. Macerals shown include micrinite, sporinite, and inertodetrinite. |
|
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].
Top of Page
|
|
 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
|
|
U.S. Department of the Interior |
U.S. Geological Survey
)
)
)
)
)
)
)
)
)
)
)