Abstract
Low to medium grade crystalline rocks locally known as Bomdila Group extensively covers the Lesser Himalayan region in Western Arunachal Himalaya. This Group consists dominantly of mylonitic gneisses of granitic composition of Palaeoproterozoic age, named as Bomdila mylonitic gneiss (BMG) and a small body of hornblende bearing granite of Mesoproterozoic age known as Salari granite (SG). The BMG is affinity to peraluminous (A/CNK > 1.1) with high content of SiO2, K2O/Na2O ratio, normative corundum, high ratio of FeOt/MgO in biotite (3.21–5.11) that shows characteristics of S-type granite whereas SG has granodiorite composition with high Na2O, low K2O, presence of hornblende, normative diopside, low A/CNK ratio (<1.1) and low FeOt/MgO ratio in biotite (1.58–1.60) indicates metaluminous I-type granite affinity. The SG has more fractionated nature of REE [(Ce/Yb)N = 9.06–18.53] and minor negative Eu anomalies [EuN/Eu* = 0.69–0.94] as compared to BMG which has less fractionation of REE [(Ce/Yb)N = 5.95–9.16] and strong negative Eu anomalies [EuN/Eu* = 0.37–0.43]. Geochemical and petrological studies suggest that the SG and BMG are not genetically related; SG appears to have derived from igneous source whereas the BMG have been derived from sedimentary source, however these granitoids might have produced during the same thermal event.
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References
Abdel-Rahman, A.M. (1994) Nature of biotites from alkaline, calcalkaline and peraluminous magmas. Jour. Petrol., v.35, pp.525–541.
Anon (1974) Geology and mineral Resources of the States of India — Assam and adjoining States. Geol. Surv. India, Misc. Publ., v.30, pp.1–24.
Barker, F. (1979) Trondhjemites: definition environment and hypothesis of origin. In: F. Basker (Ed.), Trondhjemites, Dacites and Related rocks, Elsevier, Amsterdam, pp.1–12.
Bhalla, J.K. and Bishui, P.K. (1989) Geochronology and geochemistry of granite emplacement and metamorphism in northeastern Himalaya. Rec. Geol. Surv. India, v.22, pp.18–20.
Bhattacharyya, S. and Nandy, S. (2007) Geology of the Western Arunachal Himalaya in parts of Tawang and west Kameng districts, Arunachal Pradesh. Jour. Geol. Soc. India, v.72, pp.199–207.
Bhushan, S.K., Bindal, C.M. and Aggarwal, R.K. (1991) Geology of Bomdila Group in Arunachal Pradesh. Him. Geol., v.2(2), pp.207–214.
Chappell, B.W. and White, A.J.R. (1974) Two contrasting granite types. Pacific Geol., v.8, pp.173–174.
Chappell, B.W. and White, A.J.R. (1992) I- and S-type granites in the Lachlan Fold Belt. Trans. Royal Soc. Edinb. Earth Sciences, v.83, pp.1–26.
Clemens, J.D. and Wall, V.J. (1981) Origin and crystallization of some peraluminous (S-type) granitic magmas. Can. Min. v.19, pp.111–131.
Das, A.K., Bakliwal, P.C. and Dhoundial, D.P. (1975) A brief outline of geology of parts of Kameng district, NEFA. Geol. Surv. India Misc. Publ., v.24(1), pp.115–127.
Dasgupta, S. (1995) Jaishidanda Formation. In: O.N. Bhargava (Ed.), The Bhutan Himalaya: a Geological Account, Surv., India, Calcutta. Spec. Publ., 39, Geol. pp.79–88.
Deer, W.A., Howie, R.A. and Zussman, J. (1963) Rock forming minerals, Sheet Silicates, v.3, London, Longman Green and Co., 270p.
Dikshitulu, G.D., Pandey, B.K. Krishna, V. and Dhana Raju, R. (1995) Rb-Sr systematics on granitoids of the Central Gneissic Complex, Arunachal Himalaya: Implications on Tectonic, Stratigraphy and Source. Jour. Geol. Soc. India, v.45, pp.51–60.
Dikshitulu, G.D. and Dhana Raju, R. (1997) Petrology and Geochemistry of the grantoids of Central Gneissic Complex in the Kameng district, Arunachal Pradesh. Jour. Geol. Soc. India, v.80, pp.407–419.
Frost, B.R., Barnes, C.G., Collins, W.J., Arculus, R.J., Ellis, D.J. and Frost, C.D. (2001) A geochemical classification for granitic rocks. Jour. Petrol., v.42(2), pp.2033–2048.
Gururajan, N.S. (1987) A note on the sagenitic biotite. Geoscience Jour. v.8, pp.197–200.
Hine, R., Williams, I.S., Chappell, B.W. and White, A.J.R. (1978) Contrasts between I and S Type granitoids of the Kosciusco Batholith. Jour. Geol. Soc. Australia, v.25, pp.219–234.
Hoskin, P.W.O., Kinny, P.D., Wyborn, D. and Chappell, B.W. (2000) Identifying accessory mineral saturation during differentiation in granitoid magmas: An integrated approach. Jour. Petrol., v.41, pp.1365–1395.
Islam, R., Ahmad, T. and Khanna, P.P. (2005) An overview on the granitoids of the NW Himalaya. Him. Geol., v.26(1), pp.49–60.
Johnson, M.R.W. (2003) Insight into the nature of Indian crust underthrusting the Himalaya. Terra Nova, v.15, pp.46–51.
Kretz, R. (1983) Symbols of rock forming minerals. Amer. Min., v.68, pp.277–279.
Kumar, G. (1997) Geology of Arunachal Pradesh. Geol. Soc. India, 217p.
Kumar, S. and Pathak, M. (2009). Magnetic susceptibility and geochemistry of felsic igneous rocks from western Arunachal Himalaya: Implication on granite series evaluation in Orogenic Belt. In: S. Kumar (Ed.), Magmatism, Tectonism and Mineralization, Macmillan Publ. India Ltd. New Delhi, India, pp.74–91.
Le Fort, P. and Rai, S.M. (1999) Pre-Tertiary felsic magmatism of the Nepal Himalaya: recycling of continental crust. Jour. Asian Earth Sci., v.17, pp.607–628.
Leake, B.E., Woolley, A.R., Arps, C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., Kisch, H.J., Krivovichev, V.G., Linthout, K., Laird, J., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C. Smith, D.C., Stephenson, N.C. N. Ungaretti, L., Whittaker, E.J.W. and Youzhi, G. (1997) Nomenclature of amphiboles; report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. Canadian Min., v.35(1), pp.219–246.
Nandy, D.R., Mullick, B.B., Chowdhurys, B. and Murthy, M.V.N. (1975) Geology of the NEFA Himalayas: Recent geological studies in the Himalayas. Geol. Surv. India, Misc. Publ., v.24(1), pp.91–114.
Niggli, C.R. (1965) Uber die nature sogenitaring angeodreter Nadelin in biotite. Schweiz Mineral. Petrol. Mitt., v.45, pp.807–817.
O’CONNOR, J.J. (1965) A classification for the quart-rich igneous rocks based of feldspar ratios. U.S. Geol. Surv. Publ., 525p.
Opiyo-Akech, N., Tarney, J. and Hoshino, M. (1999) Petrology and geochemistry of granites from Archean terrain north of lake Victoria, Western Kenya. Jour. African Earth Sci, v.29, pp.283–300.
Pearce, J.A. and Norry, M.J. (1979) Petrogenetic implications of Ti, Zr, Y, and Nb variations in volcanic rocks. Contrib. Min. Petrol., v.69, pp.33–47.
Pearce, J.A., Harris, N.B.W. and Tindle, A.G. (1984) Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Jour. Petrol., v.25, pp.115–125.
Punati, R.S., Frei, R. and Kramers, J.D. (1995) Isotopic evidence of a Middle Proterozoic orogeny from the Arunachal Lesser Himalaya (NEFA), India. Workshop on 10th Himalaya Karakoram Tibet, Switzerland, Abstract volume, pp.13–14.
Rashid, S.A. and Islam, N. (2009) Petrogenesis of a crustal-derived Palaeoproterozoic Bomdila orthogneiss, Arunachal Pradesh, Northeast Lesser Himalaya. In: S. Kumar (Ed.), Magmatism, Tectonism and Mineralization, Macmillan Publ. India Ltd. New Delhi, India, pp.92–101.
Richards, A., Parrish, R., Harris, N., Argles, T. and Zhang, L. (2006) Correlation of lithotectonic units across the eastern Himalaya, Bhutan. Geol., v.34(5), pp.341–344.
Romick, J.D., Kay, S.M. and Kay, R.W. (1992) The influence of amphibole fractionation on the evolution of calc-alkaline andesite and dacite tephra from the central Aleutians, Alaska. Contrib. Mineral. Petrol., v.112, pp.101–118.
Sharma, K.K. (1998) Evidence of Paleo-proterozopic orogeny (deformation, metamorphism and magmatism) from Satluj valley, NW Himalaya (Abstract volume, 13 HKT International Workshop, Peshawar, April 20–22, 1998). Geol. Bull., University of Peshawar, v.31, pp.181–182.
Sinha-Roy, S. (1980) Stratigraphic relation of the Lesser Himalayan Formations of the Eastern Himalaya. In: K.S. Valdiya and S.B. Bhatia (Ed.), Stratigraphy and Correlations of Lesser Himalayan Formations. Hindustan Publ. Corp. (India), Delhi, pp.242–254.
Sinha-Roy, S. and Sen Gupta, S. (1986) Precambrian Deformed Granites of Possible Basement in the Himalayas. Precambrian Res., v.31, pp.209–235.
Srinivasan, V. (2001) Stratigraphy and structure of low-grade metasedimentaries in eastern Bhutan and western Arunachal Pradesh. Him. Geol., v.22(2), pp.83–98.
Sun, S.S. and Mcdonough, W.F. (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: A.D. Saunders and M.J. Norry (Eds.), Magmatism in the Ocean Basins. Geol. Soc. Spec. Publ., v.42, pp.13–345.
Thakur, V.C. (1998) Structure of the Chamba nappe and position of the Main Central Thrust in Kashmir Himalaya. Jour. Asian Earth Sci., v.16, pp.269–282.
Tripathi, C., Dungrakoti, B.D., Jain, L.S., Kaura, S.C., Basu Roy, S. and Laxmipathi, N.S. (1980) Geology of Dirang-Doimara area, Kameng District, Arunachal Pradesh with special reference to structure and tectonics. Him. Geol., v.10, pp.353–365.
Valdiya, K.S. (1980) Geology of the Kumaun Lesser Himalaya. Wadia Institute of Himalayan Geology, Dehradun, 291p.
Verma, P.K. and Tandon, S.K. (1976) Geological observations in a part of the Kameng district, Arunachal Pradesh (NEFA). Him. Geol., v.6, pp.259–286.
White, A.J.R. and Chappell, B.W. (1977) Ultra-metamorphism and granitoid genesis. Tectonophysics, v.43, pp.7–22.
Yin, A. (2006) Cenozoic tectonic evolution of the Himalayan orogen as constrained by along-strike variation of structural geometry, exhumation history, and foreland sedimentation. Earth Sci. Rev., v.76, pp.1–131.
Yin, A., Dubey, C.S., Kelty, T.K., Gehrels, G.E., Chou, C.Y., Grove, M. and Lovera, O. (2006) Structural evolution of the Arunachal Himalaya and implications for asymmetric development of the Himalayan orogen. Curr. Sci., v.90, pp.195–206.
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Bikramaditya Singh, R.K. Geochemistry and petrogenesis of granitoids of Lesser Himalayan crystallines, Western Arunachal Himalaya. J Geol Soc India 75, 618–631 (2010). https://doi.org/10.1007/s12594-010-0055-3
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DOI: https://doi.org/10.1007/s12594-010-0055-3