Abstract
The Precambrian phosphorites of Bijawar Group of rocks show characteristics of a epicontinental sea with restricted and very shallow marine environment of formation along some shoals, which existed during the iron-rich Precambrian times. These phosphorite deposits located in the Hirapur-Bassia areas show extensive leaching of carbonate and phosphate minerals during episodes of weathering. X-ray diffraction studies indicated that carbonate-flourapatite is the major apatitic phase in these phosphorites while crandallite developed on the surface outcrops. There is a general tendency for the depletion of CO2 in these apatites leading to formation of flourapatite. This CO2 is an indicator of hidden weathering in the rocks. Major and trace element determinations of phosphorite have been used to indicate various correlation factors responsible for the concentration of elements in these Precambrian leached phosphorites.
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The paper is dedicated to Prof. Dr. R. C. Misra, who as a teacher and guide had been a source of inspiration to the senior author for the last two decades
The paper is a contribution to the aims and objectives of IGCP Project 156
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Banerjee, D.M., Khan, M.W.Y., Srivastava, N. et al. Precambrian phosphorites in the Bijawar rocks of Hirapur-Bassia areas, sagar district, madhya pradesh, India. Mineral. Deposita 17, 349–362 (1982). https://doi.org/10.1007/BF00204465
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DOI: https://doi.org/10.1007/BF00204465