| Abstract: | Vitrinite reflectance measurements were made to determine the rank of selected subsurface coal and coaly shale samples from Young County, north-central Texas, for the National Coal Resources Database System State Cooperative Program conducted by the Bureau of Economic Geology at The University of Texas at Austin. This research is the continuation of a pilot study that began in adjacent Archer County, and forms part of a larger investigation of the coalbed methane resource potential of Pennsylvanian coals in north-central Texas.
A total of 57 samples of coal and coaly shale fragments were hand-picked from drill cuttings from depths of about 2,000 ft in five wells, and Ro determinations were made on an initial 10-sample subset. Electric-log correlation of the sampled wells indicates that the collected samples represent coal and coaly shale layers in the Strawn (Pennsylvanian), Canyon (Pennsylvanian), and Cisco (Pennsylvanian-Permian) Groups. Coal rank in the initial sample subset ranges from lignite (Ro=0.39), in a sample from the Cisco Group at a depth of 310 to 320 ft, to high volatile bituminous A coal (Ro=0.91) in a sample from the lower part of the Canyon Group at a depth of 2,030 to 2,040 ft. |
| Genre: | USGS Numbered Series |
| ProdID: | 80680 |
| Citation Author: | Guevara, Edgar H.; Breton, Caroline; Hackley, Paul C. |
| Citation Contributing Office: | Geological Survey (U.S.) |
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| Citation Language: | ENGLISH |
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| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | Report: iii, 28 p. + Plate (1 p., 36 x 24 inches) |
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| Citation Public Comments: | Prepared in cooperation with the Bureau of Economic Geology, The University of Texas at Austin |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2007-1313 |
| Citation Search Results Text: | Coal Rank and Stratigraphy of Pennsylvanian Coal and Coaly Shale Samples, Young County, North-Central Texas; 2007; OFR; 2007-1313; Guevara, Edgar H.; Breton, Caroline; Hackley, Paul C. |
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| Citation Year: | 2007 |
| Type: | citation/reference |
| Text: | Coal Rank and Stratigraphy of Pennsylvanian Coal and Coaly Shale Samples, Young County, North-Central Texas; 2007; OFR; 2007-1313; Guevara, Edgar H.; Breton, Caroline; Hackley, Paul C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/2007/1313/ |
| Date Other: | Sat, 1 Dec 2007 00:00 -0600 |
| Publisher: | Geological Survey (U.S.) |
