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

Acta Geologica Sinica

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Abstract

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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A discovery of extremely-enriched boehmite from coal in the Junger Coalfield, the northeastern Ordos Basin
Series title:
Acta Geologica Sinica
Volume
80
Issue:
2
Year Published:
2006
Language:
Chinese
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Acta Geologica Sinica
First page:
294
Last page:
300
Number of Pages:
7