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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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carbon
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Catskill Formation (3)
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Devonian
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Middle Devonian
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Hamilton Group (1)
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Mahantango Formation (2)
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Marcellus Shale (11)
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Onondaga Limestone (4)
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Tully Limestone (1)
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Old Red Sandstone (1)
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Upper Devonian
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Chemung Formation (1)
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Famennian
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upper Famennian (1)
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Ordovician
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Utica Shale (2)
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Silurian
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Rose Hill Formation (1)
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Upper Silurian
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United States
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New York
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Pennsylvania
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Bradford County Pennsylvania (12)
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Stray gas source determination using forensic geochemical data
Evidence for water of condensation: A third source of water in shale gas wells
Multi-proxy provenance of the lower Pennsylvanian Pottsville sandstone of the northern Appalachian basin in Pennsylvania, U.S.A: Paleodrainage, sources, and detrital history
VERTEBRATE TAPHONOMY, PALEONTOLOGY, SEDIMENTOLOGY, AND PALYNOLOGY OF A FOSSILIFEROUS LATE DEVONIAN FLUVIAL SUCCESSION, CATSKILL FORMATION, NORTH-CENTRAL PENNSYLVANIA, USA
A new landslide inventory and improved susceptibility model for northeastern Pennsylvania
Enhancing subsurface imaging and reservoir characterization in the Marcellus Shale play, northeast Pennsylvania, through advanced reprocessing of wide-azimuth 3D seismic data
Heat flow and thermal conductivity measurements in the northeastern Pennsylvania Appalachian Basin depocenter
Organic matter network in post-mature Marcellus Shale: Effects on petrophysical properties
Microseismic hydraulic fracture imaging in the Marcellus Shale using head waves
Dissolved methane in shallow groundwater of the Appalachian Basin: Results from the Chesapeake Energy predrilling geochemical database
Temporal variability of methane in domestic groundwater wells, northeastern Pennsylvania
Geochemical and isotopic evolution of water produced from Middle Devonian Marcellus shale gas wells, Appalachian basin, Pennsylvania
The first Paleozoic stenopodidean from the Huntley Mountain Formation (Devonian–Carboniferous), north-central Pennsylvania
Interpretation of fractures and stress anisotropy in Marcellus Shale using multicomponent seismic data
Fracture parameter inversion for Marcellus shale
Geologic and baseline groundwater evidence for naturally occurring, shallowly sourced, thermogenic gas in northeastern Pennsylvania
Reducing risk and improving production in unconventional plays
Characterization of deep weathering and nanoporosity development in shale—A neutron study
Abstract The release of greenhouse gases from underground coal-mine fires is a function of temperature and the concentration of O 2 . In a laboratory study on spontaneous combustion, samples of coal, coal refuse, and carbonaceous shale were heated at a controlled rate between ambient temperature and 250 °C. In these experiments, the concentration of O 2 was not limited and the concentration of CO 2 increased with increasing temperature to a maximum of 10%. Carbon monoxide was not detected at temperatures below 100 °C, and the maximum concentration of CO was less than 4%. In field studies, samples of combustion gases were obtained from fires in three abandoned coal mines. These indicated a linear increase in the concentration of CO 2 relative to the decreased concentration of O 2 . At an O 2 concentration of 2%, the CO 2 concentration approached 15%, and CO was detected only when the O 2 concentration was less than 8%. At temperatures over 50 °C, the rate of desorption of CH 4 also increased, but the average concentration in the mine atmosphere was 0.20%. These laboratory experiments and field studies indicate that the rate of gas production is controlled by O 2 concentration and temperature, but physical factors, such as overburden fracturing and differences between surface and subsurface temperature and pressure, control the rate of emission to the atmosphere. In coal-mine fires, both chemical and physical factors control the rate and magnitude of contributions to the atmospheric concentration of greenhouse gases.