Mode of occurrence of phosphorus in iron ores of eastern limb,Bonai Synclinorium,eastern India |
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| Authors: | R K Upadhyay S Asokan A S Venkatesh |
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| Institution: | (1) Center for Petroleum and Geosystems Engineering, University of Texas, Austin, TX, USA;(2) Department of Earth Sciences, Indian institute of Technology, Mumbai, India;(3) Research and Development, Tata Steel, Jamshedpur, India; |
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| Abstract: | The eastern limb of horse shoe shaped “Bonai Synclinorium” in India hosts Banded Iron Formations (BIFs), consisting of major
high grade iron deposits. Phosphorus (P) gets adsorbed in the iron ore by way of ion exchange mechanism of clay minerals and
hydrated secondary iron oxide minerals. Its concentration is lesser in hard ores and blue dust types of ores, while the highest
in case of lateritic ores. P content reduces with increase in iron (Fe) content in individual ore types. Along the eastern
limb, phosphorus content gradually reduces from north to south direction. Since phosphorus is mainly associated with secondary
lateritization process, its concentration is very high in top weathered profile and along the weaker zones. |
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