Show simple item record Drobniak, Agnieszka Mastalerz, Maria Schimmelmann, Arndt Sauer, Peter 2007-08-14T17:34:42Z 2007-08-14T17:34:42Z 2007-08
dc.description This poster will be presented at the joint meeting of the Canadian Society for Coal Science and Organic Petrology, The Society for Organic Petrology, and the International Committee for Coal and Organic Petrology at the University of Victoria, Victoria, British Columbia, Canada, on August 19-25, 2007. en
dc.description.abstract Changes in high-volatile bituminous coal (Pennsylvanian) near contacts with volcanic intrusions in Illinois were investigated with respect to coal chemistry, carbon and hydrogen stable isotope ratios, and pore structure. Vitrinite reflectance (Ro) increases from ~0.6% to ~5% within 4.7 m from the dike. Elemental chemistry of the coal shows distinct reduction in hydrogen and nitrogen content approaching the intrusions. No trend was noticed for total sulfur content, but decreases in sulfate and organic sulfur contents towards the dikes indicate thermal sulfur reduction (TSR). Carbon isotopic values did not show significant changes, whereas hydrogen isotopic values showed a distinct trend of becoming more negative toward the dikes. Contact metamorphism has a dramatic effect on coal porosity. The mesopore volume decreases 3 3 from 0.01 cm /g in the unaffected coal to 0.004 cm /g at a distance 3 of 4.5 m away from the contact, then hovers around 0.004 cm /g closer to the contact. In contrast, the micropore volume shows a 3 progressive decrease from 0.04 cm /g in unaffected coal to almost 3 0.01 cm /g at the contact. Strongly decreasing mesopore and micropore volumes in the altered zone, together with frequent cleat and fracture-filling by calcite, indicate deteriorating conditions for both coalbed gas sorption and gas transmissibility. en
dc.format.extent 4001987 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.rights This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. To view a copy of this license, visit or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA. en
dc.rights.uri en
dc.subject Illinois Basin en
dc.subject Indiana en
dc.subject Illinois en
dc.subject Kentucky en
dc.subject Indiana Geological Survey en
dc.subject dike en
dc.subject thermal alteration en
dc.subject contact metamorphism en
dc.subject coal en
dc.subject bituminous en
dc.subject optical characteristics en
dc.subject coal rank en
dc.subject coal chemistry en
dc.subject pore size en
dc.subject isotopic composition en
dc.subject vitrinite reflectance en
dc.subject thermal effect en
dc.subject coal characterization en
dc.title Contact Metamorphism of Bituminous Coal by Intruding Dike in the Illinois Basin Causes Short-Range Thermal Alteration en
dc.type Presentation en

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