First Report on Platinum Occurrence in Ultramafic-Mafic Complex, East-Central Karbi Hills of Assam, North East India
Authors
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Department of Applied Geology, Dibrugarh University, Dibrugarh - 786 004, Assam
Dilip Majumdar -
Department of Applied Geology, Dibrugarh University, Dibrugarh - 786 004, Assam
Abhijit Gogoi
DOI:
https://doi.org/10.1007/s12594-019-1303-9Keywords:
No Keywords.Abstract
The results of SEM-EDS and XRD, indicating the presence of PGE in stratified vanadium bearing magnetite-ilmenite ore, hosted by layered ultramafic-mafic complex in a part of east-central Karbi Anglong district, Assam (NE India) are reported here. The initial XRD data indicate presence of PGE minerals like braggite, laurite and cooperite; the SEM-EDS indicate variable wt. % of PGE and rare metals like 11.58% Re and gold. The highest weight % value is 19.55 Pt; 13.83 Ir; 7.36 Os; 0.95 Pd and 0.45 Ru. Plume model has been cited as the key factor causing high partial melting of the upper mantle in back arc rift environment, producing platinum rich but sulphur poor magma, subsequently acquiring sulphur from pelites of Shillong Group, thereby, gaining PGE.
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Auge, T., Cocherie, A, Genna, A., Armstrong, R., Guerrot, C., Mukherjee, M.M. and Patra, R.N. (2003) Age of Baula PGE mineralization (Orissa, India) and its implications concerning the Singhbhum Archean Nucleus, Precambrian Res., v.121, pp.85-101.
Bidyananda, M. and Deomurari, M.P. (2007) Geochronological constraints on the evolution of Megahalaya massif, northeastern India: an ion microprobe study. Curr. Sci., v.93, pp.1620–1623.
Cawthorn, R.G., Barnes, S.J., Ballhaus, C. and Malitch, K.N. (2005) Platinum group element, chromium, and vanadium deposits in mafic and ultramafic rocks. Econ.Geol. 100th Anniv. Vol., pp.215-249.
Devaraju, T.C., Alapieti, T.T. and kaukonen, R.J. (2005) SEM-EDS study of the platinum-group minerals in the PGE mineralized Hanumalpura segment of layered ultramafic complex of Channagiri, Devangere district, Karnataka. Jour. Geol. Soc. India, v.65, pp.745-752.
Farooqui, S.A. and Singh, A.K. (2006) Platinum mineralization in Ikauna Area, Lalitpur District, Uttar Pradesh. Jour. Geol. Soc. India, v.68, pp.582–584.
Hazra, S., Ray, J., Manikymba, C., Saha, A., Sawant, S.S. (2015) Geochemistry of PGE in mafic rocks of East Khasi Hills, Shillong Plateau, NE India. Jour. Earth Sci., v.124(2), pp.459-475.
Ihlenfeld, C. and Keays, R. (2011) Crustal contamination and PGE mineralization in the Platreef, Bushveld Complex, South Africa: evidence for multiple contamination events and transport of magmatic sulfides. Mineral. Deposita, v.46, pp.813–832.
Majumdar, D. and Dutta, P. (2016) Geodynamic evolution of a Pan-African granitoid of extended Dizo Valley in Karbi Hills, NE India: Evidence from Geochemistry and Isotope Geology. Jour. Asian Earth Sci., v.117, pp.256–268.
Mazumder, S.K. (1986) The Precambrian framework of part of the Khasi Hills, Meghalaya. Rec. Geol. Surv. India, v.117(2), pp.1-59.
Mondal, R., and Baidya, T. (2015) Titaniferous magnetite deposits associated with Archean Greenstone belt in the east Indian shield. Earth Sciences, v.4 (4-1), pp.15-30.
Singh, S., Balaram, V., Satyanarayanan, M.V., Anjaiah, K. and Kharya, A. (2010) Platinum group elements in basic and ultrabasic rocks around Madawara, Bundelkhand Massif, Central India. Curr. Sci., v.99, pp.375-383.
