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A discovery of extremely-enriched boehmite from coal in the Junger Coalfield, the northeastern Ordos Basin

January 1, 2006

The authors found an extremely-enriched boehmite and its associated minerals for the first time in the super-thick No. 6 coal seam from the Junger Coalfield in the northeastern Ordos Basin by using technologies including the X-ray diffraction analysis (XRD), scanning electron microscope equipped with an energy dispersive X-ray spectrometer, and optical microscope. The content of boehmite is as high as 13.1%, and the associated minerals are goyazite, zircon, rutile, goethite, galena, clausthalite, and selenio-galena. The heavy minerals assemblage is similar to that in the bauxite of the Benxi Formation from North China. The high boehmite in coal is mainly from weathering crust bauxite of the Benxi Formation from the northeastern coal-accumulation basin. The gibbsite colloidstone solution was removed from bauxite to the peat mire, and boehmite was formed via compaction and dehydration of gibbsite colloidstone solution in the period of peat accumulation and early period of diagenesis.

Publication Year 2006
Title A discovery of extremely-enriched boehmite from coal in the Junger Coalfield, the northeastern Ordos Basin
Authors S. Dai, D. Ren, S. Li, C. Chou
Publication Type Article
Publication Subtype Journal Article
Series Title Acta Geologica Sinica
Index ID 70030735
Record Source USGS Publications Warehouse