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| Anthracite coal fields | |
|---|---|
| Name | Anthracite coal fields |
| Settlement type | Coalfields |
| Subdivision type | Region |
| Subdivision name | Appalachian Basin, South Wales, Donbas |
Anthracite coal fields are regions where high-rank coal, characterized by high carbon content and low volatile matter, occurs in concentrated seams. These coalfields have shaped industrial centers, transport networks, and labor movements from the 18th century through the 20th century, linking locations such as the Lehigh Valley, South Wales Coalfield, Donbas, Rhineland, and Appalachian Mountains. Geological processes and tectonic events including the Variscan orogeny, Alleghenian orogeny, and Caledonian orogeny influenced metamorphism and seam distribution across continents.
Anthracite-bearing basins are typically associated with folded and faulted strata in orogenic belts where peat underwent deep burial, heat, and pressure during events like the Alleghenian orogeny and the Variscan orogeny. Key lithologies include folded Pennsylvanian and Carboniferous coal measures with overlying sandstone and underclay, and intrusive contacts with plutons such as those related to the Sierra Nevada batholith or local batholiths can locally alter rank. Structural controls are documented in regions studied by geologists associated with institutions like the United States Geological Survey, the British Geological Survey, and the Geological Survey of Canada.
Major anthracite provinces include the Eastern United States's Pennsylvania, notably the Lehigh Valley, Schuylkill County, and the Wyoming Valley; the United Kingdom's South Wales Coalfield and pockets in Northumberland; the Donbas in Ukraine and Russia; the Rhineland and Saarland in Germany; the Liaoning and Jilin provinces in China; and the Newcastle region in Australia. Smaller but significant occurrences appear in the Zagros Mountains, Appalachian Basin, and parts of Japan such as Hokkaido.
Anthracite forms from peat subjected to high-grade metamorphism during the late stages of basin inversion and continental collision such as the Alleghenian orogeny and Variscan orogeny. Rank progression from lignite through bituminous coal to anthracite involves loss of volatiles and increase in fixed carbon; comparable transformations have been investigated by researchers at Columbia University, University of Oxford, and the Max Planck Society. Characteristic metrics include high calorific value (MJ/kg), low sulfur when formed in freshwater swamps studied by paleobotanists at the Smithsonian Institution and Natural History Museum, London, and elevated reflectance measured by petrographers using standards from the International Committee for Coal and Organic Petrology.
Extraction in anthracite regions drove urbanization and capital investment tied to actors like the Lehigh Coal & Navigation Company, the Reading Railroad, and the Pennsylvania Railroad in the United States, and firms such as British Coal and the National Coal Board in the United Kingdom. Early exploitation intersected with events including the Industrial Revolution, the railway boom, and labor struggles epitomized by the Ludlow Massacre-era conflicts and the Anthracite Coal Strike of 1902 led by the United Mine Workers of America. Mining towns developed civic institutions such as parishes and cultural networks maintained by immigrants from Ireland, Wales, Poland, and Italy.
Historic methods included drift, slope, and shaft mining with hand tools and mule haulage later supplanted by mechanized longwall and room-and-pillar systems developed by engineering firms affiliated with Westinghouse Electric Corporation and General Electric. Ventilation, drainage, and roof control practices advanced through regulations from bodies like the Mine Safety and Health Administration and the Health and Safety Executive (United Kingdom), while mechanization introduced continuous miners, shuttle cars, and conveyor belts designed by manufacturers such as Joy Global and Sandvik. Modern surveillance employs seismic monitoring, remote sensing by agencies like the European Space Agency, and environmental controls following guidance from the World Health Organization.
Anthracite coalfields powered metallurgy in centers with blast furnaces at locations like Bethlehem Steel and fueled urban heating and electric utilities owned by companies such as Consolidated Edison. Revenues from anthracite supported banking and capital markets in hubs like New York City and London, influenced trade policies debated in parliaments and legislatures including the United States Congress and the Parliament of the United Kingdom, and underpinned wartime production during conflicts involving the United States, United Kingdom, and Germany. Decline of anthracite mining precipitated regional economic restructuring, prompting interventions by agencies including the U.S. Department of Labor and the European Commission.
Anthracite mining and combustion have environmental legacies addressed by remediation programs of the Environmental Protection Agency, the Environment Agency (England and Wales), and regional authorities such as the Pennsylvania Department of Environmental Protection. Issues include acid mine drainage documented in watersheds monitored by the United States Geological Survey, subsidence affecting infrastructure managed by municipal authorities, and air quality impacts regulated under statutes like those administered by the Clean Air Act frameworks. Occupational health concerns—black lung disease and silicosis—were central to litigations and research at institutions including the National Institute for Occupational Safety and Health and the London School of Hygiene & Tropical Medicine, leading to compensation schemes and preventive regulations.
Category:Coal mining Category:Geology