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Petro-Mineralogical Studies of Phosphorite Deposit of Sallopat Block of Banswara District, Rajasthan, India

Authors: K. F. Khan, Samsuddin Khan


The Paleoproterozoic phosphorite deposit of Sallopat block of Banswara district of Rajasthan belongs to kalinjara formation of lunavada group of Aravalli Super Group. The phosphorites are found to occur as massive, brecciated, laminated and stromatolitic associated with calcareous quartzite, interbedded dolomite and multi coloured chert. The phosphorites are showing alternate brown and grey coloured concentric rims which are composed of phosphate, calcite and quartz minerals. Petro-mineralogical studies of phosphorite samples using petrological microscope, XRD, FEG- SEM and EDX reveal that apatite-(CaF) and apatite-(CaOH) are phosphate minerals which are intermixed with minor amount of carbonate materials. Sporadic findings of the uniform tiny granules of partially anisotropic apatite-(CaF) along with dolomite, calcite, quartz, muscovite, zeolite and other gangue minerals have been observed with the replacement of phosphate material by quartz and carbonate. The presence of microbial filaments of organic matter and alternate concentric rims of stromatolitic structure may suggest that the deposition of the phosphate took place in shallow marine oxidizing environmental conditions leading to the formation of phosphorite layers as primary biogenic precipitates by bacterial or algal activities. Different forms and texture of phosphate minerals may be due to environmental vicissitudes at the time of deposition followed by some replacement processes and biogenic activities.

Keywords: Petro-mineralogy, phosphorites, sallopat, apatite.

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[1] K.F. Khan, Shamim A. Dar and Saif A. Khan, “Petrography of Phosphorite Deposits of Durmala and Maldeota, Uttrakhand”. Jour. of the Ind. Asso. of Sedimentologists, vol. 30 (1), 2011, pp. 33-41.
[2] G.M. Filippelli, “Phosphate rock formation and marine phosphorus geochemistry.” The deep time perspective. Chemosphere, 84, Aug, 2011, 759-766.
[3] K.F. Khan, S.A. Dar and S. A. Khan, “Petrography of the phosphorite deposits of Durmala and Maldeota, Uttrakhand.” Jour. of the Ind. Asso. of Sedimentologists, 30 (1), 2011 pp 31-41.
[4] K.F. Khan, S.A. Saif and S. A. Dar and Z. Hussain, “Geochemistry of phosphorite deposits around Hirapur–Mardeora area in Chhatarpur and Sagar Districts, Madhya Pradesh, India.” Journal of Geology and Mining Research, 4(3), Apr., 2012, 51-64.
[5] S. L Mehra and C. Biswas, “Report on the investigation for phosphorite in parts of Udaipur, Dungarpur and Banswara district, Rajasthan”. Unpublished Prog. Rep. F. S. pp. 3, 1968-69.
[6] G. Barman, “Report on the study of stromatolites from the Aravalli Supergroup in Sallopat area, Banswara district, Rajasthan”. Unpublished prog. Rep. F.S. 1973-74, pp.2
[7] A. Gadhadharan, “Report on the systematic geological mapping in parts of Banswara, Udaipur and Chittaurgarh district, Rajasthen”. Unpublished Prog. Rep. F.S. 1968-69,
[8] D.S. Chauhan and S.K. Trivedi, “Deformation Pattern in the Precambrian Stromatolitic Phosphorite of Sallopat Area, Rajasthan, India,” The Indian Precambrian, ed. B.S.paliwal, Sci. Publ. Jodhpur, India, 1998, pp. 159-170.
[9] S.N. Gupta, Y.K. Arora, R. K. Mathur, Iqbaluddin, B. Prasad, T.N. Sahai and S.B. Sharma, “Lithostratigraphic map of Aravalli region Southern Rajasthan and northern Gujrat. Pub. Geol. Surv.of India, 1980.
[10] A.B Roy, R. Purohit, “Lithostratigraphic, geochronological and depositional framework of the Precambrian basins of the Aravalli Mountain and Adjoining areas, Rajasthan, India,” Geol. Soc. London, Mem. Vol.1, Ch. 4, Mar. 2015, pp. 61-62.
[11] H. Schleicher, W. Todt, S.G. Viladkar and F. Schimdt, “Pb-Pb age determination of Newania and Savattur carbonatites of India: evidence of multiple stage histories,” Chem. Geology, vol. 140, 1997, pp. 261-270.
[12] M. Deb & R. I. Thorpe, “Geochronological constraints in the Precambrian Geology of Rajasthan and their metallogenic implications”. In: Deb, M. & Goodfellow, W.D. (eds) Sediment-hosted Lead-Zinc Sulphide Deposits. Narosa, New Delhi, pp. 246-263, Aug2004.
[13] S.N. Gupta, Y.K. Arora, R.K. Mathur, Iqbaluddin, B. Prasad, T.N. Sahai and S.B. Sharma, “The Precambrian Geology of the Aravalli region, southern Rajasthan and North Eastern Gujarat,” Geol. Surv. of India, Mem. Vol. 123 Pub. GSI Culcutta, 1997, pp.59-61.
[14] S.K. Banerjee and N.K. Sood, “Geology of Sallopat Phosphorite Deposit,” in Phosphorite of India, Mem. 13 D.M Banerjee, Geol. Soc. of India, Bangalore, India, 1989, pp. 39-41.
[15] S.M. Naqvi and John J.W Rogers, “Precambrian Geology of India” Geological Magazine, New York: Clarendon Press; Oxford University Press, 1987, pp. 172-176.
[16] D. Papineau, R. Purohit, L. Fogal Marilyn and Shields-Zhou A. Graham “High phosphate availability as a possible cause of massive cyanobacterial production of oxygen in the Paleoproterozoic atmosphere,” Earth Planet. Sci. Lett. J., vol. 362, Jan. 2013 pp. 225-236.
[17] A. Ounis, L. Kocsis, F. Chaabani & H. R. Pfeifer, “Rare earth elements and stable isotope geochemistry (13C and 18O) of phosphorite deposits in the Gafsa basin, Tunisia,” Paleogeography, Paleoclimatology, Paleoecology, Vol. 268, July 2008, pp. 7-8.
[18] S.A. Dar, K.F. Khan, Samsuddin Khan and M. Masroor Alam, “Petro-mineralogical studies of the Paleoproterozoic phosphorites in the Sonrai basin, Lalitpur district, Uttar Pradesh, India”, Natu. Resource Res. J., Vol. 24, No. 3, Sep. 2015 pp 339-348.
[19] V.P. Rao, E. Henger, S.W.A Naqvi, P.M Kessarkar, S.A Masood and D.S Raju. “Miocene phosphorite from the Murray ridge, northwestern Arabian sea,”, Palaeogeography, palaeoclimatology, palaeoecology, J., Vol. 260, Dec, 2008, pp. 347-358.
[20] V.P., Rao, P.M Kessarkar, R. Nagendra and Babu, “Origin of Cretaceous phosphorites from the onshore of Tamil Nadu”, India Jour. of Ear. Sys. Science, Vol. 116(6), Dec. 2007, pp.525-536.