Whole-rock Geochemistry of Gneiss from Thana, Bhilwara, India
DOI:
https://doi.org/10.48165/Keywords:
Gneiss, I-Type Granite, Petrography, MineralogyAbstract
Gneiss is medium to high grade metamorphic rock present in one third part of Thana. These rocks have been formed by the metamorphism of pre-existing granites under medium to high P/T conditions and it consist essential minerals like quartz, k-feldspar, plagioclase, biotite, hornblende, epidote, garnet and iron-oxides. Geochemically, this gneiss is metaluminous in nature and similar to I-Type granite which is chemically similar to continental arc granitoids. It is also clear that they are formed by the highly fractionated magma. This paper records the petrography, geochemical character and probable origin of this gneiss.
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References
Barker, F. (1979). Trondhjemite: definition, environment and hypotheses of origin. In Developments in petrology; (6), 1-12. Elsevier.
Buick IS, Allen C, Pandit M, Rubatto D, and Hermannb J. (2006). The Proterozoic magmatic and metamorphic history of the Banded Gneiss Complex, central Rajasthan, India LA-ICP-MS ,U-Pb zircon constraints. Precambrian Research 151(1-2), 119-142.
Chappel S. W. and White, A. J. R. (1974).Two contrasting granite types. Pacific Geology; v. (8), 173-174.
Chaudhary AL, Gopalan K, Sastry CA. (1984). Present status of geochronology of the Precambrian rocks of Rajasthan. Tectonophysics 105(1-4), 131-140.
Cox, K. G., Bell, J. D. and Pankhurst, R. J. (1979).The Interpretation of igneous rocks. London: Allen & Unwin; 450 p.
Dietrich, R.V., Mehnert, K. R. (1960).Proposal for the nomenclature of migmatites and associated rocks. Int Geol Congr 21st Copenhagen 1960 Rept Session Norden Suppl; Vol(Sect 1–21), 56–67.
Gopalan K, MacDougall J.D, Roy A.B, Murali A.B (1990). Sm-Nd evidence for 3.3Ga old rocks in Rajasthan, North Western India. Precambrian Research 48(3), 287-297.
Gupta, B.C. (1934). The geology of Central Mewar. Geol. Surv. India, Mem;. 65, 107-168.
Gupta, S. N., Arora, Y. K., Mathur, R. K., Iqbaluddin, Prasad, B., Sahai, T. N. and Sharma, S. B. (1980). Lithostratigraphic map of Aravalli region. Geological Survey of India (Hyderabad).
Gupta, S. N. (1997). The Precambrian geology of the Aravalli region, southern Rajasthan and north eastern Gujarat. Mem. Geol. Surv. India, 123, 262.
Harker, A. (1909). The natural history of igneous rocks. Methuen & Company.
Heron, A.M. (1917).Geology of northeastern Rajputana and adjacent districts. Geol. Surv. India, Mem.; 45, 128p.13. Heron, A. M. (1935). Synopsis of the pre- Vindhayan geology of Rajasthan. Trans. Nat. Inst. Sci. Ind.; 1, 1-17.
Heron, A.M. (1953). The geology of Central Rajputana, Geol. Surv. India Mem.; 79, 1-389.
Heron. A. M. (1953). The Geology of Central Rajputana. Mem. Geol. Surv. India; 79, l-339.
Irvine, T. N. And Baragar, W.R.A. (1971). A guide to the chemical classification of the common rocks. Can. Jour. Earth Sci.; 8, 523- 548.
Joshi, M., Thomas, H., Sharma, R. S. (1993). Granulite facies metamorphism in the Archaean gneiss complex from North– Central Rajasthan. Proc. Nat. Acad. Sci. India; 63 (A), I, 167–187.
Kavit, S., Thomas, H. (2018). Petrogeochemistry of Gneissic Rocks Exposed Around Arjungarh, District Rajsamand, Rajasthan, India. Crimson Publishers; pp. 85-91.
Peccerillo, A. and Taylor, S.R. (1976). Geochemistry of Eocene calcalkaline volcanic rocks from the Kastamanu Area, Northern Turkey. Contributions to Mineralogy and Petrology; 58, 63-81.
Robb, L. J. (1983). Trace element trends in granites and the distinction between partial melting and crystal fractionation processes: a case studies from two granites in Southern Africa. In The significance of trace elements in solving petrogenetic problems and controversies; pp. 279-294.
Roy AB, Kroner A (1996) Single zircon evaporation ages contraining the growth of the Archaean Aravalli craton, northwestern Indian shield. Geol Magn 133(3), 333-342.
Sarkar, G., Roy Barman, T. and Corfu, F. (1989). Timing of continental arc-type magmatism in Northwest India: evidence from U-Pb zircon geochronology, Jour. Geol.; V.97: pp.607-612.
Shand, S. J. (1943). Eruptive rocks. Their genesis, composition, classification, and their relation to ore-deposits with a chapter on meteorite, 2nd edition: New York, NY, John Wiley & Sons; p. 1–444.
Sharma, R. S. (2003). Evolution of Proterozoic fold belts of India: a case of the Aravalli mountain belt of Rajasthan, NW India. Memoirs-geological society of India; pp.
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