Geological models of Spontaneous Combustion in the Wuda Coalfield, Inner Mongolia, China
Daiyong Cao, Xinjie Fan, Haiyan Guan, Chacha Wu, Xiaolei Shi, Yuerong Jia, 2007. "Geological models of Spontaneous Combustion in the Wuda Coalfield, Inner Mongolia, China", Geology of Coal Fires: Case Studies from Around the World, Glenn B. Stracher
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Spontaneous combustion of coal seams is a complicated process that involves complex physical and chemical interactions between the seam and its surrounding environment; the ultimate results are a function of the interplay of internal and external conditions. Based on geologic field investigations and comprehensive analyses, four models of spontaneous combustion for coal were established: (1) a genesis-type model that is based on the coal characteristics that lead to spontaneous combustion; (2) a coal-fires propagation model, namely how spontaneous combustion propagates through a coal seam; (3) a model for the progressive stages and products of a coal fire; and (4) a cross-sectional model of zones that are conducive to spontaneous combustion in a mined-out area. These models provide a scientific and theoretic basis for monitoring and extinguishing the spontaneous combustion of coal.
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The “sedimentary cover” refers to the stratified rocks of youngest Proterozoic and Phanerozoic age that rest upon the largely crystalline basement rocks of the continental interior. The early chapters of the volume present data and interpretations of the geophysics of the craton and summarize, with sequential maps, the tectonic evolution of the craton. The main body of the text and accompanying plates and figures present the stratigraphy, structural history, and economic geology of specific sedimentary basins (e.g., Appalachian basin) and regions (e.g., Rocky Mountains). The volume concludes with a summary chapter in which the currently popular theories of cratonal tectonics are discussed and the unresolved questions are identified.