Analysis of Coal Samples from the Hazard District, Kentucky (Breathitt, Knott, Leslie, and Perry Counties and Other Parts of Letcher and Harlan Counties)

Chemical and petrographic doto ore presented for 132 samples of cool collected in the Hazard District, eastern Kentucky. These data include sample-site locations, sampling conditions, stratigraphic position, megoscopic description of the cool, air-drying loss, proximate and ultimate analyses, Btu content, forms of sulfur, initial deformation temperature, softening temperature, fluid temperature, free-swelling index, concentration of major, minor, and trace elements, and petrographic analyses

Analysis of Coal Samples from the Southwestern District, Kentucky (Clay, Jackson, Knox, Laurel, Lee, McCreary, Owsley, Whitley, and Parts of Bell, Clinton, Estill, Madison, Pulaski, Rockcastle, and Wayne Counties)

Chemical and petrographic data ore presented for 119 samples of cool collected in the Southwestern District, eastern Kentucky. The data include sample-site locations, sampling conditions, stratigraphic position, megoscopic description of the cool, air-drying loss, proximate and ultimate analyses, Btu content, forms of sulfur, initial deformation temperature, softening temperature, fluid temperature, free-swelling index, concentration of major- and minor-oxides and trace elements, and petrographic analyses

Analysis of Coal Samples from Licking River District, Kentucky (Elliott, Magoffin, Morgan, and Wolfe Counties and Parts of Menifee, Powell, and Rowan Counties)

Chemical and petrographic data ore presented for 41 samples of cool collected in the Licking River District, eastern Kentucky. These data include sample-site locations, sampling conditions, stratigraphic position, megoscopic description of the cool, air-drying loss, proximate and ultimate analyses, Btu content, forms of sulfur, initial deformation temperature, softening temperature, fluid temperature, free-swelling index, concentration of major- and minor-oxides and trace elements, and petrographic analyses

Analysis of Coal Samples from the Big Sandy District, Kentucky (Floyd, Johnson, Martin, and Pike Counties)

Chemical and petrographic data ore presented for 146 samples of cool collected in the Big Sandy District, eastern Kentucky. The data include sample-site locations, sampling conditions, stratigraphic position, megoscopic description of the cool, air-drying loss, proximate and ultimate analyses, Btu content, forms of sulfur, initial deformation temperature, softening temperature, fluid temperature, free-swelling index, concentration of major- and minor-oxides and trace elements, and petrographic analyses

Analysis of Coal Samples from the Princess District, Kentucky (Boyd, Carter, Greenup, and Lawrence Counties and Part of Lewis County)

Chemical and petrographic data are presented for 42 samples of coal collected in the Princess District, eastern Kentucky. These data include sample-site locations, sampling conditions, stratigraphic position, megascopic description of the coal, air-drying loss, proximate and ultimate analyses, Btu content, forms of sulfur, initial deformation temperature, softening temperature, fluid temperature, free-swelling index, concentration of major, minor, and trace inorganic elements, and petrographic analyses

Analysis of Coal Samples from the Upper Cumberland District, Kentucky (Parts of Bell, Harlan, Letcher, and Whitley Counties)

Chemical and petrographic data ore presented for 57 samples of cool collected in the Upper Cumberland District, eastern Kentucky. These data include sample-site locations, sampling conditions, stratigraphic position, megoscopic description of the cool, air-drying loss, proximate and ultimate analyses, Btu content, forms of sulfur, initial deformation temperature, softening temperature, fluid temperature, free-swelling index, concentration of major- and minor-oxides and trace elements, and petrographic analyses

Rare Earth-Bearing Particles in Fly Ash Carbons: Examples from the Combustion of Eastern Kentucky Coals

Graphitic carbons from the combustion of bituminous coals and, perhaps, other coal ranks, tend to capture iron and a number of hazardous elements, including As, Hg, and Se. Rare earth elements in fly ashes occur in minerals, such as monazite, xenotime, and davidite. They also occur in sub-nm particles, probably in a mineral form, within the Al–Si glass on the investigated fly ashes. Just as graphitic carbons can capture Fe and hazardous elements, the carbons surrounding the fly ash glass and magnetic particles captures or encapsulates a broad suite of rare earth elements

Ultrafine Mineral Associations in Superhigh-Organic-Sulfur Kentucky Coals

Two high-organic-sulfur Kentucky coals, the eastern Kentucky River Gem coal and the western Kentucky Davis coal, are examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), both including elemental analysis by energy-dispersive spectroscopy (EDS). From the SEM–EDS analysis, it is observed that the western Kentucky coal had areas with Pb and Cd in addition to the expected Fe and S and the eastern Kentucky coal had individual Fe–S-rich areas with La and Ni and with Si, Al, Cr, Ni, and Ti. TEM and selected area electron diffraction (SAED) analyses demonstrate that anglesite with a rim of Pb-bearing amorphous Fe-oxide occurs in the western Kentucky coal. Melanterite, an Fe-sulfate, with minor Al, Si, and K EDS peaks, suggests that clay minerals may be in close association with the sulfate, is also detected in the coal. A polycrystalline metal in the eastern Kentucky sample with a composition similar to stainless steel is adjacent to an Al-rich shard. Euhedral pyrite grains surrounded by kaolinite and gibbsite are detected. Overall, it is noted that element associations should not be assumed to be organic just because minerals cannot be seen with optical microscopy or with standard bulk analytical techniques, such as X-ray diffraction (XRD)

Constraints on the Emplacement and Uplift History of the Pine Mountain Thrust Sheet, Eastern Kentucky: Evidence from Coal Rank Trends

In this paper coal rank trends on both sides of the Pine Mountain thrust in eastern Kentucky are used to place constraints on thrust evolution. Vitrinite reflectance () measurements on a single Pennsylvanian coal horizon (Fire Clay coal) in eastern Kentucky increase from 0.5% in the north to about 1.0% toward the SE in front of the Pine Mountain thrust. The same horizon in the hangingwall of the thrust displays lower Rmax values (0.8-0.85%). The reflectance isograds are subparallel to the thrust within approximately 10 km of the trace of the fault. We attribute thermal maturation to (1) pre-orogenic maturation by burial to a depth of about 2 km followed by (2) maturation due to conductive relaxation in the footwall after thrusting. Isotherms would not have been offset unless the thrust velocity was \u3e\u3e 10km / Mα. Assuming no erosion, the emergent thrust would have been approximately 3 km thick. In order to explain the relatively low reflectance values observed in the footwall, rapid uplift (\u3e3 km/Ma) after thrust emplacement is required. Alternatively, if erosion kept pace with thrusting, the thrust sheet would have been substantially thinner (\u3c1 \u3ekm), and thermal equilibrium would be rapidly attained in the footwall. Localized frictional heating may have caused elevated reflectance values observed in sheared coals from outcrop scale faults