Abstract
Considering the importance of REE resources, that are used in several high-technology areas, the present study aims to assess the potentiality of REE in the sedimentary sequence of Shella and Kopili formations (350m and 60m respectively) in East Jaintia Hills district, Meghalaya. A well-developed sedimentary sequence of Shella and Kopili formations of Jaintia Group, middle to upper Eocene age, are exposed in Jaintia Hills. The semi-quantitative (SEM-EDX) analysis of black shale and carbonaceous shale indicate the presence of monazite and xenotime phases. The REE+Y concentration ranges from 77.1 to 1168.7 ppm (avg. 295 ppm). The LREEs (La-Eu) ranges from 55 to 782 ppm (avg. 211.3 ppm), whereas HREEs (Gd-Lu+Y) ranges from 18.8 to 385.9 ppm (avg. 83.7 ppm). Nd ranges from 15.8 to 229.3 ppm (avg. 66.1 ppm). The REE+Y concentration in black shale yields 1168.7 ppm. Further, REE in two coal samples yields 111.6 and 63.2 ppm. REE shows a strong positive correlation with Zr, Y, U and Th, weak positive correlation with V and weak negative correlation with Sc. The REE concentrations in coal samples are relatively higher than previously reported REE concentrations and are comparable with worldwide average values of REE. The REE concentrations in black shale and coal are significant for further exploration.
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References
Barooah, P.K. and Baruah, M.K. (1996) Sulphur in Assam coal. Fuel Process. Technol., v.46, pp.83–97.
Dai, S., Li, D., Chou, C.L., Zhao, L., Zhang, Y., Ren, D., Ma, Y. and Sun, Y. (2008) Mineralogy and geochemistry of boehmite-rich coals: new insights from the Haerwusu Surface Mine, Jungar coal field, Inner Mongolia, China. Internat. Jour. Coal Geol., v.74, pp.185–202.
Dai, S., Graham, I.T. and Ward, C.R. (2016) A review of anomalous rare earth elements and yttrium in coal. Internat. Jour. Coal Geol., v.159, pp.82–95.
Finkelman, R.B. (1993) Trace and minor elements in coal. In: Engel M.H., Macko S.A. (Eds.), Organic geochemistry. Plenum, New York, pp.593–607.
Franus, W., Wiatros-Motyka, M.M. and Wdowin, M. (2015) Coal fly ash as a resource for rare earth elements. Environ. Sci. Pollut. Res., v.22, pp.9464–9474.
Geological Survey of India, Misc. Pub. (2009) Geology and Mineral resources of Meghalaya, No. 30 part IV, v.2(ii), p.53.
Hower, J.C., Ruppert, L.F. and Eble, C.F. (1999) Lanthanide, yttrium, and zirconium anomalies in the fire clay coal bed, Eastern Kentucky. Internat. Jour. Coal Geol., v.39, pp.141–153.
IUPAC (2005) Nomenclature of inorganic chemistry. In: N.G. Connelly et al. (Eds.), IUPAC recommendations 2005. International Union of Pure and Applied Chemistry (IUPAC).
Ketris, M.P. and Yudovich, Ya.E. (2009) Estimations of Clarkes for carbonaceous biolithes: world average for trace element contents in black shales and coals. Internat. Jour. Coal Geol., v.78, pp.135–148.
Krenn, E. and Finger, F. (2007) Formation of monazite and rhabdophane at the expense of allanite during Alpine low temperature retrogression of metapelitic basement rocks from Grete, Greece: microprobe data and geochronological implications. Lithos, v.95, pp.130–147.
Krishnamurthy, P. (2020) Rare metal (RM) and rare earth element (REE) resources: World scenario with special reference to India. Jour. Geol. Soc. India, v.95(5), pp. 465–474.
Kuºcu, M., Özsoy, R., Özçelik, O. and Altunsoy, M. (2016) Trace and rare earth element geochemistry of black shales in Triassic Kasimlar Formation, Anamas-Akseki Platform, western Taurids, Turkey. IOP Conf. Series: Earth and Environmental Science, IOP Publishing Ltd., v.44, p. 6.
Leventhal, J. (1990) Comparative geochemistry of metals and rare earth elements from the Cambrian alum shale and kolm of Sweden. Spec. Publs. Internat. Assoc. Sediment., v.11, pp.203–216.
Mastalerz, M., Drobniak, A., Eble, C., Ames, P. and McLaughlin, P. (2020) Rare earth elements and yttrium in Pennsylvanian coals and shales in the eastern part of the Illinois Basin. Internat. Jour. Coal Geol., v.231, 103620.
Nagy, G., Draganits, E., Demeny, A. Pantó, G. and Árkai, P. (2002) Genesis and transformations of monazite, florencite and rhabdophane during medium grade metamorphism: examples from the Sopron Hills, Eastern Alps. Chem. Geol., v.191, pp.25–46.
Pazand, K. (2015) Rare earth element geochemistry of coals from the Mazino Coal Mine, Tabas Coalfield, Iran. Arab. Jour. Geosci., v.8, pp.10859–10869.
Rabha, S., Saikia, J., Subramanyam, K.S.V., Hower, J.C., Hood, M.M., Khare, P. and Saikia, B.K. (2018) Geochemistry and nanomineralogy of feed coals and their coal combustion residues from two different coal-based industries in northeast India. Energ. Fuels, v.32, pp.3697–3708.
Raja Rao, C.S. (1981) Coalfields of India, Bulletin Series A, no. 45, Vol. 1: coalfields of North Eastern India. Geol. Surv. India, p.124.
Sadiq, M., Umrao, R.K. and Dutta, J.C. (2014a) Occurrence of rare earth elements in parts of Nongpoh granite, Ri-Bhoi district, Meghalaya. Curr. Sci., v.106(2), pp.162–165.
Sadiq, M., Ranjith A. and Umrao, R.K. (2014b), REE mineralization in the carbonatites of the Sung Valley Ultramafic-Alkaline-Carbonatite Complex, Meghalaya, India. Open Geosci., v.6(4), pp.457–475.
Sadiq, M. and Umrao, R.K. (2017) Significant occurrence of REE in titaniferous lateritic bauxite (TLB) capping in Sung Valley Complex, Meghalaya, India. Indian Jour. Geosci., v.71(2), pp.387–394.
Sadiq, M., Umrao, R.K., Sharma, B.B., Chakraborti, S., Bhattacharyya, S. and Kundu, A. (2018) Mineralogy, geochemistry and geochronology of mafic magmatic enclaves and their significance in evolution of Nongpoh granitoids, Meghalaya, NE India. In: Sensarma, S. and Storey, B.C. (Eds.), Large Igneous Provinces from Gondwana and Adjacent Regions. Geol. Soc., London, Spec. Publ., v.463, pp.171–198. doi:https://doi.org/10.1144/SP463.2.
Sadiq, M. and Umrao, R.K. (2020) Nb-Ta-rare earth element mineralization in titaniferous laterite cappings over Sung Valley ultramafic rocks in Meghalaya, India. Ore Geol. Rev., v.120(5), pp.103439. doi: https://doi.org/10.1016/j.oregeorev.2020.103439.
Savko, K.A., Korish, E.K., Pilyugin, S.M. and Polyakova, T.N. (2010) Phase relations of REE-bearing minerals during the metamorphism of carbonaceous shales in the Tim-Yastrebovskaya structure, Voronezh Crystalline Massif, Russia. Petrology, v.18, pp.384–415.
Taylor, S.R. and McLennan, S.M. (1985) The continental crust: Its composition and evolution. Blackwell, Oxford, 312p.
Tyson, R.V. and Pearson, T.H. (1991) Modern and ancient continental shelf anoxia: an overview. In: Tyson, R.V., Pearson, T.H. (Eds.), Modern and Ancient Continental Shelf Anoxia. Geol. Soc. Spec. Publ., v.58, pp.1–24.
Yudovich, Y.E. and Ketris, M.P. (1988) Geochemistry of black shales (Nauka, Leningrad, 1988) [in Russian].
Weng, Z., Jowitt, S.M., Mudd, G.M. and Haque, N. (2015) A detailed assessment of global rare earth element resources: opportunities and challenges. Econ. Geol., v.110(8), pp.1925–1952.
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Umrao, R.K., Sardar, S.K. Significant Occurrences of REE in Tertiary Sequence of East Jaintia Hills, Meghalaya, India. J Geol Soc India 98, 621–626 (2022). https://doi.org/10.1007/s12594-022-2036-8
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DOI: https://doi.org/10.1007/s12594-022-2036-8