Abstract
Calc-silicate rocks occurring in and around Lunavada town belong to the Kadana Formation of the Lunavada Group of the Aravalli Supergroup. These rocks are embedded within pelitic schists in the form of sporadically distributed lensoidal bodies and are surrounded by quartzitic ridges. Rocks of the Kadana Formation and its surrounding area have experienced intrusive event named as ‘Godhra granite’ which occupy the SW part of this area. Some prominent field characteristics shown by these calc-silicates include fine to medium grained size, dark grey colour, unoriented/star shaped amphibole needles and maculose structure. These rocks have contact metamorphic textural features and the typical mineral assemblage viz., Act +Di + Qtz + Ttn+ Cal ± Mc ± Bt ± Pl ± Ep ± Scp ± Chl with minor proportion of apatite, zircon and opaques. EPMA studies revealed that the Ca-amphibole composition of these rocks ranges from magnesio-hornblende to actinolite whereas the clinopyroxene is salitic to diopsidic and the mica is found to be phlogopitic biotite. Certain prograde and retrograde reactions textures present within these rocks have been interpreted, for e.g. the development of diopside (salite) from ankeritic composition which is then retrogressed and actinolite appeared, prograde reaction leading to the formation of titanite from ilmenite and calcite and breakdown of scapolite into calcite and quartz with plagioclase lacking co-existence with these scapolites, indicating retrogression. Mineral assemblage and mineral chemistry data interpretation points towards the calcareous sandstone or marl as a probable protolith having impure calcareous composition, moreover, field characteristics and reaction textures observed give indication that the protolith might had passed through the contact metamorphic event to give rise to the present day calc-silicates.
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References
Bhaskar Rao, B. (1986) Metamorphic petrology. CRC Press, 182p.
Das, S., Singh, P.K. and Srikarni, C. (2009) A preliminary study of thermal metamorphism in the Champaner Group of rocks in Panchmahals and Vadodara districts of Gujarat. Indian Jour. Geosci., v. 63(4), pp.373–382.
Deer, W. A., Howie, R. A. and Zussman, J. (1985) An Introduction to the Rock Forming Minerals, Longman, London, 15th edition, 528p.
Deer, W. A., Howie, R. A. and Zussman, J. (1992) An Introduction to the Rock Forming Minerals, Longman, London, 2nd edition, 696p.
Fukai, I. (2013) Metamorphic and geochemical signatures of Calc-silicate gneisses from the Sawtooth metamorphic complex, Idaho, USA: Implications for the crustal evolution in the western north America. (Unpublished) Dissertation thesis.
Ghosh, S.K. (1993) Structural Geology: Fundamentals and Developments. Pergamon Press, UK, 597p.
Gopalan, K., Trivedi, J.R., Merh, S.S., Patel, P.P. and Patel, S.G. (1979) Rb-Sr age of Godhra and related granites, Gujarat (India). Proc. Indian Acad. Sci., Earth Planet. Sci., v.88A, pp.7–17.
Gupta, B.C. and Mukherjee, P.N. (1938) Geology of Gujarat and Southern Rajputana. Rec. Geol. Surv. India, v.73, pp.163–208.
Gupta, S.N., Arora, Y.K., Mathur, R.K., Iqbaluddin, B.P., Sahai, T.N. and Sharma, S.B. (1995) Geological Map of the Precambrians of the Aravalli Region, Southern Rajasthan and Northeastern Gujarat, India. Geol. Surv. India Publ., Hyderabad.
Gupta, S.N., Arora, Y.K., Mathur, R.K., Iqbaluddin, B.P., Sahai, T.N. and Sharma, S.B. (1980) Lithostratigraphic Map of Aravalli Region, Southern Rajasthan and North Eastern Gujarat. Geol. Surv. India Publ., Hyderabad.
Gupta, S.N., Arora, Y.K., Mathur, R.K., Iqbaluddin, B.P., Sahai, T.N. and Sharma, S.B. (1997) The Precambrian geology of the Aravalli region, Southern Rajasthan and Northeastern Gujarat. Mem. Geol. Surv. India, v. 123, pp.58–65.
Gupta, S.N., Mathur, R.K. and Arora, Y.K. (1992) Lithostratigraphy of Proterozoic rocks of Rajasthan and Gujarat. A Review, Rec. Geol. Surv. India. v.115, pp. 63–85.
Iqbaluddin and Venkataramaiah, T.(1976) Photogeological mapping with selective checks in parts of Kadana Reservoir area, Panchmahal district, Gujarat. Rep. (Unpubl.) Geol. Surv. India (F.S.1975–76)
Iqbaluddin, B.P. (1989) Geology of Kadana Reservoir Area, Panchmahals District, Gujarat and Banswara and Dungarpur districts, Rajasthan. Mem. Geol. Surv. India, v. 121, pp.84.
Joshi, A.U., Limaye, M. A. and Deota, B. S. (2016) Microstructural indicators of post-deformational brittle-ductile shear zones, Lunawada region, Southern Aravalli Mountain Belt, Gujarat, India. Jour. M.S.U.S.T, v.51(1), pp.19–27.
Leake, B.E. (1978) Nomenclature of amphiboles. Amer. Mineral., v.63, pp.1023–1052.
Leake, B.E., Woolley, A.R., 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., 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. European Jour. Mineral., v.9, pp.623–651.
Mamtani, M. A., Karmakar, I. B. and Merh, S.S. (2002) Evidence of Polyphase Deformation in Gneissic Rocks Around Devgadh Bariya: Implications for Evolution of Godhra Granite in the Southern Aravalli Region (India) Gondwana Res., v.5(2), pp.401–408.
Mamtani, M.A. (1998) Deformational mechanisms of the Lunavada Pre-Cambrian rocks, Panchmahal district, Gujarat. Unpublished Ph.D.thesis, M.S. University of Baroda (India). pp.268.
Mamtani, M.A. and Greiling, R.O. (2005) Granite emplacement and its relation with regional deformation in the Aravalli Mountain Belt (India)-inferences from magnetic fabric. Jour. Struct. Geol., v.27, pp.2008–2029.
Mamtani, M.A., Greiling, R.O., Karanth, R.V. and Merh, S.S. (1999a) Orogenic deformation and its relation with AMS fabric — an Example from the Southern Aravalli Mountain Belt, India. In: Radhakrishna, T. and Piper, J.D. (Eds.), The Indian Subcontinent and Gondwana: A Palaeomagnetic and Rock Magnetic Perspective. Mem. Geol. Soc. India, no.44, pp.9–24.
Mamtani, M.A., Karanth, R.V., Merh, S.S. and Greiling, R.O. (2000) Tectonic evolution of the Southern part of Aravalli Mountain Belt and its environs-possible causes and time constraints. Gondwana Res., v.3, pp.175–187.
Mamtani, M.A., Merh, S.S., Karanth, R.V. and Greiling, R.O. (2001) Time relationship between metamorphism and deformation in the Proterozoic rocks of Lunavada region, southern Aravalli Mountain Belt (India) — a microstructural study. Jour. Asian Earth Sci., v. 19, pp.195–205.
Merh, S.S. (1995) Geology of Gujarat. Geological Society of India, Bangalore, 224p.
Passchier, C.W. and Trouw, R.A.J. (2005) Microtectonics. Springer-Verlag, Heidelberg, 366p.
Purohit, R., Papinaeu, D., Mehata, P., Fogel, M. and Dharma Rao, C.V. (2015) Study of Calc-Silicate Rocks of Hammer-Head Syncline from Southern Sandmata Complex, Northwestern India:Implications on Existence of an Archaean Protolith. Jour. Geol. Soc. India, v.85, pp.215–231.
Rene, M. (2008) Titanite-ilmenite-magnetite phase relations in amphibolites of the Chynov area (Bohemian massif, Czec republic). Acta Geodyn. Geomater. v.5(3)151, pp.239–246.
Sameera, K.A.G. and Perera, L.R.K. (2015) Petrological study of calcsilicate granulites in the Southern Highland Complex of Sri Lanka. Jour. Geol. Soc. Sri Lanka, v.17, pp.87–100 J.W. Herath Felicitation. Volume 87.
Satish-Kumar, M., Santosh, M. and Yoshida, M. (1995) Reaction textures in Calc-Silicates as guides to the pressure — temperature — fluid History of granulite facies terrains in East Gondwana. Jour. Geosci., v.38, Act. 5, pp.89–114.
Sen, K. and Mamtani, M.A. (2006) Magnetic fabric, shape preferred orientation and regional strain in granitic rocks. Jour. Struct. Geol., v.28, pp.1870–1882.
Winter, J. D. (2001) An Introduction to Igneous and Metamorphic Petrology, Prentice Hall, Upper Saddle River, NJ, 796p.
Acknowledgements
The authors are grateful to Prof. H. Kataria, Dean, Faculty of Science and I/C Head, Department of Geology, The M. S. University of Baroda, Vadodara for providing necessary facilities. The first author is also thankful to the DST-Woman scientist (WOS-A) project, for providing funding to carry out this work. First author is also thankful to Prof. L.S. Chamyal for his constant encouragement. We are indebted to two anonymous reviewers for their constructive comments and suggestions which improved the manuscript considerably. Authors thankfully acknowledge the help rendered by Prof. N.V. Chalapathi Rao and Dr. Dinesh Pandit, Banaras Hindu University, Varanasi, for carrying out EPMA analyses.
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Akolkar, G., Limaye, M.A. Mineral Chemistry and Reaction Textures of Calc-silicate Rocks of the Lunavada Region, SAMB, NE Gujarat. J Geol Soc India 97, 151–157 (2021). https://doi.org/10.1007/s12594-021-1646-x
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DOI: https://doi.org/10.1007/s12594-021-1646-x