Geochemistry and Petrogenesis of 2.8 Ga Old Rare Metal Bearing Fertile Granite at Allapatna, Mandya District, Karnataka
Authors
-
Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Nagarbhavi, Bengaluru - 560 072
Chanchal Sarbajna -
Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016
U. K. Pandey
-
No.63, 12th Cross, Basappa Layout, Bengaluru - 560 019
P. Krishnamurthy
DOI:
https://doi.org/10.1007/s12594-018-0821-1Abstract
This paper reports petrography, geochemistry and Rb-Sr age data on the rare metal bearing Neoarchean fertile (Nb-Ta) granite at Allapatna and elucidates its petrogenesis and role in Nb-Ta- Li-Be mineralization. The Allapatna granite (AG) intrudes the Tonalitic-Trondhjemitic - Granodioritic (TTG) Peninsular Gneiss and analysed SiO2 (72.3-75.6 wt%), K2O (4.0-5.7wt%), Na2O (3.0- 4.4wt%), CaO (0.7-1wt%), MgO (0.13-0.25wt%) and K2O/Na2O (>1) indicating evolved nature. The presence of muscovite, biotite and garnet in the mode, peraluminous nature and high initial 87Sr/86Sr ratio (0.7284±0.0083) attest to their S-type characteristics. Varying Nb/Ta ratio and high Li with moderate abundance of Cs further indicate affinity to Li-Cs-Ta (LCT) type granite-pegmatite system. The AG showing whole rock Rb-Sr isochron age of 2803± 68 Ma, is the oldest reported fertile granite in India parental to rare metal pegmatites hosting Nb-Ta, Be, and Li resources. Partial melting of a mixed source consisting of both basement TTG rocks and metapelites has generated such type of granitic magma. Fractionation of such granitic magma possibly has given rise to the rare metal (Ta-Nb-Li-Be) bearing pegmatites intruding the nearby schist belt.
Downloads
Metrics
Issue
Section
Downloads
Published
How to Cite
References
Balasubrahmanyan, M.N. (1978) Geochronology and geochemistry of Archaean tonalite gneisses and granites of south Kanara, district, Karnatka. In: Windley & Naqvi (Eds). Archaean geochemistry. Elsevier, pp.58-77.
Banerjee, D.C., Krishna, K.V.G., Murthy, G.V.G.K., Srivastava, S.K. and Sinha, R.P. (1994) Occurrence of spodumene in the rare metal bearing pegmatites of Marlagalla-Allapatna area, Mandya district, Karnataka, India. Jour. Geol. Soc. India, v.44, pp.127-139.
Banerjee, D.C., Ranganath, N., Maithani, P.B. and Jayaram, K.M.V. (1987) Rare metal bearing pegmatites in parts of southern Karnataka, India. Jour. Geol. Soc. India, v.30, pp. 507-513.
Blockley, J.G. (1980) The tin deposit of western Australia, with special reference to the associated granite. Geol. Surv. Western Australia Min. Res. Bull., no,12, 184p.
Bouseley, El, A.M. and Sokkary, El A.A. (1975) The relation between Rb, Ba and Sr in granitic rocks. Chem. Geol., v.16, pp.207-219.
Boynton,W.V. (1984) Cosmochemistry of the rare earth elements; meteorite studies. In: Rare earth element geochemistry. Henderson, P. (Ed.), Elsevier Sci. Publ. Co., Amsterdam, pp. 63-114
Breaks, F.W.and Moore, J.M., JR. (1992) The Ghost lake batholith,Superior province of Northwestern Ontario: a fertile peraluminous granite-rare element pegmatite system: Canad. Mineral. v.30, pp.835-876.
Cerny, P. (1982) Anatomy and classification of granitic pegmatite In: Cerney, P. (Ed.). Granitic Pegmatites in science and industry. Min. Assoc. Can. Short course, Hand book, v.8, p.1-39.
Cerny, P. (1991a) Fertile granites of precambrian rare element pegmatite field is geochemistry controlled by tectonic setting or source lithologies? Precambrian Res. v.51, pp.429-468.
Cerny, P. (1991b) Rare element Granitic Pegmatites. Par 1: Anatomy and internal evolution of pegmatite deposits. Part 11: Regional to Global Environments and Petrogenesis, Geoscience, Canada, v.8, pp.4967.
Cerny, P. (2005) The Tanco rare element pegmatite deposits, Manitoba: regional context, internal anatomy and global comparison. In: Linnen, R.L. and Samson,I.M., (Eds.), rare element geochemistry and mineral deposits, Geol. Assoc. Canada, short course notes, v.17, pp.127-158.
Cerny, P. and Meintzer, R.E. (1988) Fertile granites in the Archean and Proterozoic fields of rare element pegmatites:crustal environment, geochemistryand petrogenetic relationships. In: Taylor, R.P. and Strong, D.F. (Eds.), Recent Advances in the Geology of granite related mineral deposits, The Canadian Institute of Mining and Metallugy, Special Publication, no.39, pp.170-206.
Cerny, P., Meintzer, R.E. and Anderson, A.J. (1985) Extreme fractionation in rare-element granitic pegmatites: Selected examples of data and mechanisms. Canad. Mineral., v.23, pp.381-421.
Cerny, P, Trueman, D.L., Jiehlke, D.V., Goad, B.E. and Paul, B.J. (1981) The Cat lake-Winnipeg river and Waekusko lake pegmatite fields, Manitoba. Man. Energy and Mines, Mineral Research Division. Econ. Geol. Report, ER 80-1.
Chadwick, B, Vasudev, V.N. and Hegde, G.V. (2000) The Dharwar craton southern India, interpreted as the result of Late Archean oblique convergence. Precambrian Res., v.99, pp.91-111.
Cullers, R.L. Koch, R. and Bickford, M.E. (1981) Chemical evolution of magmas in the igneous terrain of the St. FrancosisMts, MO, II, Trace element evidences. Jour. Geophys., Res., v.86, pp.10365-10387.
Gordon, G.E., Handle, K., Goles, G.G., Corliss, J.B., Beeson, M.H. and Oxley, S.S. (1968) Instrumental activation analysis of standard rocks with high resolution y ray detectors. Geochim. Cosmochim. Acta, v.32, pp.369396.
Jayananda, M., Moyen, J.F., Martin, H, Peucot, J.J., Auvray, B. and Mahabaleswar, B. (2000) Late Archean (2550-2520 Ma) juvenile magmatism in the eastern Dharwar craton, southern India:constraints from geochronology, Nd-Sr isotopes and whole rock geochemistry. Precambrian Res., v.99, pp. 225-254.
Linnen, R.L. and Cuney, M. (2005) Granite-related rare element deposits and experimental constraints on Ta-Nb-W-Sn-Zr-Hf mineralization. In: Linnen, R.L. and Iain M.S. (Eds.), rare element geochemistry and mineral deposits, Geol. Assoc. Canada, short course notes, v.17, pp.45-68.
London, D. (1987) Internal differentiation of rare element pegmatites: effects on boron, phospherous and fluorine. Geochim. Cosmochim. Acta, v.51, pp.403-420.
Ludwig, K.R. (1993) ISOPLOT – A plotting and regression program for radiogenic isotope data version 2.70. USGS open file report 91-445, pp.42.
Maibam, B., Goswami, J.N. and Srinivasan, R. (2011) Pb–Pb zircon ages of Archaean metasediments andgneisses from the Dharwar craton, southern India:Implications for the antiquity of the easternDharwar craton. Jour. Earth. Syst. Sci., v.120, pp. 643–661.
Meintzer, R.E. (1987) The mineralogy and geochemistry of the granitoid rocks and related pegmatites of the yellowknife pegmatite field, Northwest territories. Unpub. Ph.D. Thesis, Univ. Manitoba., Canada.
Moyen, J.-F., Martin H., Jayananda., and Auvray. B.(2003) Late Archean granites: a typology based on the Dharwar craton (India). Precamb. Res. v. 127, pp. 103-123.
Naha, K. Srinivasan, R. and Mukhopadhyay, D. (1996) Structural studies and their bearing on the Early Precambrian history of the Dharwar tectonic province, southern India. Earth and Planet. sci. v.105, pp.379-412.
Naqvi, S.M., Narayana, B.L., Rama Rao, P. and Udairaj, B. (1980) Geology and geochemistry of paragneisses from the Jabanahalli schist belt. Jour. Geol.Soc. India, v.21, pp. 577-592.
O'Connor, J.T. (1965) Classification of quartz rich igneous rocks based on feldspar rations, U. S. Geol. Sur. Prof. Paper, 525-B, p. 79-84.
Pearce, J.A., Nigel, B.W.H. and Andrew, G.T. (1984) Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Jour. Petrol., v.25, pp.956-983.
Radhakrishna, B.P. and Vaidyanathan, R. (1997) Geology of Karnataka. Geol. Soc. India. Bangalore, 298p.
Ramakrishnan, M. (1994) Stratigraphic evolution of Dharwar craton. In: B.M. Ravindra and R. Ranganathan (Eds.), Geo Karnataka, Mysore Geological Department, pp.6-35.
Ramesh Babu, P.V. (1990) Petrology, geochemistry and mineralisation in parts of the Bastar -Koraput pegmatite belt, MadhyaPradesh and Orissa, India. Unpublished PhD thesis, OsmaniaUniversity, Hyderabad, India, 103p.
Ramesh Babu, P.V., Pandey, B.K. and Dhanaraju, R. (1993) Rb-Sr ages on the granite and pegmatite mineral from BastarKoraput Belt, Madhya Pradesh and Orissa, India. Jour. Geol. Soc. India, v.42, pp.33-38.
Sarbajna, Chanchal (1998) Geology and geochemistry of rare metal pegmatites from parts of Southern Karnataka, India, Unpublished PhD Thesis, Osmania University, Hyderabad, India, p.103.
Sarbajna, Chanchal and Krishnamurthy, P. (1996) The fertile granite at Allapatna, Mandya district, Karnatka: A possible parent to Rare metal pegmatites of southern Karnataka. Jour. Geol. Soc. India, v.46, pp. 95-98.
Shand, S.J. (1943) Eruptive Rocks. Their Genesis, Composition, Classification, and Their Relation to Ore-Deposits with a Chapter on Meteorite. New York: John Wiley & Sons.
Shaw, D.M. (1968) A review of K-Rb fractionation trends by covariance analysis. Geochim. Cosmochim. Acta, v.32, pp.573-601.
Shearer, C.K., Papike, J.J. and Laul, J.C. (1987) Mineralogical and chemical evolution of a rare element granite pegmatite system: Harney Peak batholithe, Black Hills, South Dacota. Geochim. Cosmochim. Acta, v.51, pp.473-486.
Streckeisen, A.L. (1976) To each plutonic rock © its proper name. Earth Sci. Rev., v.12, pp.1-33.
Srikantappa, C., Shanker, B.N. and Vasudev, V.N. (1992) Spinifex Textured peridotitic Komatiite from Karigatta, Chitradurg schist belt, Karnataka. Jour. Geol. Soc. India, v.40, pp.175-178.
Swami Nath, J. and Ramakrishnan, M. (1981). Early precambrian supra crustals of southern Karnataka. Memoir. Geol. Surv. India.,v.112, pp.23-38.
Taylor, S.R. and Mclennan, S.M. (1995)The geochemical evolution of the continental crust. Rev. in Geophys. v.33, pp.241-265.
Turekian, K.K. and Wedephol, K.H. (1963) Distribution of the elements in some major units of the earth's crust. Bull. Geol. Soc. Amer., v.72, pp.175-192.
Winkler, H.G.F. (1964) Petrogenesis of Metamorphic Rocks, 1st ed. Springer, Heidelberg, 238p.
Winkler, H.G.F. (1967) Petrogenesis of metamorphic rocks, second edition. Springer-verlag, Newyork, 334p.
