Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Tectono-Metamorphic and Geochronologic Studies from Sandmata Complex, Northwest Indian Shield: Implications on Exhumation of Late-Palaeoproterozoic Granulites in an Archaean-Early Palaeoproterozoic Granite-Gneiss Terrane


Affiliations
1 Department of Geology, Presidency University, Kolkata 700 073, India
2 Institut fur Geowissenchaften, Universitaet Mainz, 55099 Mainz, Germany
3 3/2 Kanji Ka Hata, Udaipur 313 001, India
4 10/805, Malviya Nagar, Jaipur 302017, India
5 Department of Geology, Government College, Sirohi 327001, India
     

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Several bodies of granulites comprising charnockite, charno-enderbite, pelitic and calc-silicate rocks occur within an assemblage of granite gneiss/granitoid, amphibolite and metasediments (henceforth described as banded gneisses) in the central part of the Aravalli Mountains, northwestern India. The combined rock assemblage was thought to constitute an Archaean basement (BGC-II) onto which the successive Proterozoic cover rocks were deposited. Recent field studies reveal the occurrence of several bodies of late-Palaeoproterozoic (1725 and 1621 Ma) granulites within the banded gneisses, which locally show evidence of migmatization at c. 1900 Ma coeval with the Aravalli Orogeny. We report single zircon 'evaporation' ages together with information from LA-ICP-MS U-Pb zircon datings to confirm an Archaean (2905 - ca. 2500 Ma) age for the banded gneisses hosting the granulites. The new geochronological data, therefore, suggest a polycyclic evolution for the BGC-II terrane for which the new term Sandmata Complex is proposed. The zircon ages suggest that the different rock formations in the Sandmata Complex are neither entirely Palaeoproterozoic in age, as claimed in some studies nor are they exclusively Archaean as was initially thought. Apart from distinct differences in the age of rocks, tectono-metamorphic breaks are observed in the field between the Archaean banded gneisses and the Palaeoproterozoic granulites. Collating the data on granulite ages with the known tectono-stratigraphic framework of the Aravalli Mountains, we conclude that the evolution and exhumation of granulites in the Sandmata Complex occurred during a tectono-magmatic/metamorphic event, which cannot be linked to known orogenic cycles that shaped this ancient mountain belt. We present some field and geochronologic evidence to elucidate the exhumation history and tectonic emplacement of the late Palaeoproterozoic, high P-T granulites into the Archaean banded gneisses. The granulite-facies metamorphism has been correlated with the thermal perturbation during the asymmetric opening of Delhi basins at around 1700 Ma.

Keywords

Geochronology, Granulite Exhumation, Sandmata Complex, Aravalli Mountains.
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  • ASWATHANARAYANA, U. (1964) Age determination of rocks and geochronology of India. Brochure, 22nd Int. Geol. Cong., New Delhi, p. 23.

  • BHOWMIK, S.K., BERNHARDT, HEINZ-J. and DASGUPTA, S. (2010) Grenvillian age high-pressure upper amphibolite-granulite metamorphism in the Aravalli-Delhi Mobile Belt, Northwestern India: New evidence from monazite chemical age and its implication. Precambrian Res., v.178, pp.168-184.

  • BIJU-SHEKAR, S., YOKOYAMA, K., PANDIT, M.K., OKUDARAIA, T. YOSHIDA, M. and SANTOSH, M. (2003) Late Palaeoproterozoic magmatism in Delhi Fold Belt, NW India and its implication: evidence from EPMA chemical ages of zircons. Jour. Asian Earth Sci., v.22, pp.189-207.

  • BUICK, I.S., ALLEN, C., PANDIT, M., RUBATTO, D. and HERMAN, J. (2006) The Proterozoic magmatic and metamorphic history of the Banded Gneissic Complex, central Rajasthan, India: La-ICP-MS U-Pb zircon constraints. Precambrian Res., v.151, pp.119-142.

  • CHAPMAN, H.J. and RODICK, J.C. (1994) Kinetics of Pb release during zircon evaporation technique. Earth Planet. Sci. Lett., v.121, pp.601-611.

  • CHOUDHARY, A.K., GOPALAN, K. and SASTRY, C. A. (1984) Present status of the geochronology of the Precambrian rocks of Rajasthan. Tectonophysics, v.105, pp.131-140.

  • CRAWFORD, A. R. and COMPSTON, W., (1970) The age of Viindhyan system of Peninsular India. Quart. Jour. Geol. Soc. London, v.125, pp.351-372.

  • DASGUPTA, S., GUPTA, P., SENGUPTA, P., MIURAU, H. AND EHL, J., (1997) Pressure-temperature-fluid evolutionary history of the polymetamorphic Sandmata granulite complex. Precambrian Res., v.83, pp.267-290.

  • DEB, M. and THORPE, R.I. (2004) Geochronological constraints in the Precambrian Geology of Rajasthan and their metallogenic implications. In: M. Deb and W.D. Goodfellow (Eds.), Sediment-hosted Lead- Zinc Sulphide Deposits. Narosa Publishing House, New Delhi, India, pp.246-263.

  • DEB, M., THORPE, R. I., CUMMING, G. L. and WAGNER, P. A. (1989) Age, source and stratigraphic implications of Pb-Isotope data for conformable, sediment hosted, base metal deposits in the Proterozoic Aravalli-Delhi orogenic belt, northwestern India. Precambrian Res., v.43, pp.1-22.

  • DIRKS, P.H.G., ZHANG, J.S. and PASSCHIER, C.W. (1997) Exhumation of high-pressure granulites and the role of lower crustal advection in the North China Craton near Datong. Jour. Struc. Geol., v.19, pp.1343-1358.

  • FAREEDUDDIN and KRÖNER, A. (1998) Single zircon age constraints on the evolution of Rajasthan granulite. In: B.S.Paliwal (Ed.), The Indian Precambrian. Scientific Publishers (India), Jodhpur, pp.547-556.

  • GERYA, T.V., PERCHUK, L.L. MARESCH, W.V. and WILLNER, A.P. (2004) Inherent gravitational instability of hot continental crust: Implications for doming and diapirism in granulite facies terrains. In: D.L. Whitney et al. (Eds.), Gneiss domes in orogeny: Boulder, Colorado. Geol. Soc. Amer. Spec. Paper, v.380, pp.97-115

  • GOPALAN, K., MACDAUGALL, J.D., ROY, A.B. and MURALI, A.V., (1990) Sm-Nd evidence for 3.3 Ga old rock in Rajasthan, north-western India. Precambrian Res., v.48, 287-297.

  • GUHA, D.B. and BHATTACHARYA, A.K. (1995) Metamorphic evolution and high grade reworking of the Sandmata Complex granulites. In: K.R. Gupta and S. Sinha-Roy (Eds.), Continental crust of northwestern and central India. Mem. Geol. Surv. India, v.31, pp.163-198.

  • GUPTA B. C., (1934) The Geolgy of Central Mewar. Mem. Geol. Surv. India, v.65, pp.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 the Aravalli region, southern Rajasthan and northeastern Gujarat. Geol. Surv. India, Calcutta. Scale 1:1,000,000.

  • GYANI, K.C., KONILOV, A.N. and FONAREV, V.L. (2000). Granulite P-T paths and crustal evolution of southern Rajasthan. In: K.C. Gyani, P. Kataria (Eds.), Tectonomagmatism, geochemistry and metamorphism of Precambrian terrains. Proc. Nat. Sem, Department of Geology, ML Sukhadia University, Udaipur, pp.275-301.

  • HERON, A. M. ,(1953) Geology of central Rajputana. Mem. Geol. Surv. India, v.79, 339p.

  • KAUR, P., CHAUDHRI, N., RACZEK, I., KRÖNER, A. AND HOFMANN, A.W., (2007) Geochemistry, zircon ages and whole-rock Nd isotopic systematics for Palaeoproterozoic A-type granitoids in the northern part of the Delhi belt, Rajasthan, NW India: implications for late Palaeoproterozoic crustal evolution of the Aravalli craton. Geol. Mag., v.144 (2), pp.361-378.

  • KAUR, P., CHAUDHRI, N., RACZEK, I., KRÖNER, A., HOFMANN, A.W., and OKRUSCH, M. (2011a) Zircon ages of late Palaeoproterozoic (ca.1.72-1.70 Ga) extension-related granitoids in NE Rajasthan, India: Regional and tectonic significance. Gondwana Res., v.19, pp.1040-1053.

  • KAUR, P., ZEH, A., CHAUDHRI, N., GERDES, A. and OKRUSCH, M., (2011b) Archaean to Palaeoproterozoic crustal evolution of the Aravalli mountain range and its hinterland: The U-Pb and Hf Isotope records of detrital zircon. Precambrian Res., v.187, pp.155-164.

  • KAUFMAN, A.J., JIAN, G., CHRISTIC-BLICK, N., BANERJEE, D. M. and RAI, V., (2006) Stable isotope record of the thermal Neoproterozoic Krol platform in the Lesser Himalayas of northern India. Precambrian Res., v.147, pp.156-185.

  • KOBER, B. (1986) Whole-grain evaporation for 207Pb/206Pb investigations on single zircons using double filament thermal ion source. Contrib. Mineral. Petrol., v.93, pp.482-490.

  • KOBER, B. (1987) Single zircon evaporation combined with Pb+ emitter-bedding for 207Pb/206Pb –age investigations using thermal ion mass spectrometry, and implications for zirconology. Contrib. Mineral. Petrol., v.96, pp.63-71.

  • KRONER, A. and HEGNER, E. (1998) Geochemistry, single zircon ages and Sm-Nd systematics of granitoid rocks from the Góry Sowie (Owl) Mts., Polish West Sudetes: evidence for early Palaeozoic arc-related plutonism. Jour. Geol. Soc. London, v.155, pp.711-724.

  • KRONER, A. and TODT, W. (1988) Single zircon dating constraining the maximum age of Berberton Greenstone Belt, southern Africa. Jour. Geophys. Res., Phase- of metamorphic v.93, pp.15329-15337.

  • KRONER, A., COMPSTON, W. and WILLIAMS, I.S. (1989) Growth of early Archaean Crust in the Ancient Gneiss Complex of Swaziland as revealed by single zircon dating. Tectonophysics, v.161, pp.271-298.

  • NAHA, K. and HALYBURTON, R.V., (1974) Early Precambrian stratigraphy of central and southern Rajasthan, India. Precambrian Res., v.1, pp.55-73.

  • NAHA, K. and ROY, A.B. (1983) The problem of the Precambrian basement in Rajasthan, western India. Precambrian Res., v.19, pp.217–223.

  • PASSCHIER, C.W., MYERS, J.S. and KRÖNER, A. (1990) Field geology of high grade terrain, Berlin: Springer Verlag, 150p.

  • PERCHUK, L.L. (1989) P-T-fluid regimes of metamorphism and related magmatism. In: J.S. Daly, R.A. Cliff and B.W.D. Yardlye (Eds.), Evolution of Metamorphic belts. Blackwell Scientific Publications, Oxford, pp.275-292.

  • RATHORE, S.S., VENKATESH, T. R. and SRIVASTAVA, R. K., (1999) RbSr isotope dating of Neoproteroozic (Malani Group) magmatism from southwest Rajasthan, India: evidence of younger Pan-African thermal event by 40Ar-39Ar studies. Gondwana Res., v.2 (2), pp.271-281.

  • RAO, C.V.D, SANTOSH, M., PUROHIT, R., WANG, J., JIANG, X. and KUSKY, T. (2011) LA-ICP-MS U-Pb zircon age constraints on the Palaeoproterozoic and Neoarchaean history of the Sandmata Complex in Rajasthan within NW Indian Plate. Jour. Asian Earth Science. Doi :10.1016/j.jeas.2011.01.018.

  • ROY, A.B. (1988). Stratigraphic and tectonic framework of the Aravalli Mountain Range. In: A.B. Roy (Ed.), Precambrian of the Aravalli Mountain, Rajasthan, India. Mem. Geol. Soc. India, no.7, pp.3-31.

  • ROY, A.B. (1990) Evolution of early Precambrian crust of the Aravalli Mountain range. In: S.M. Naqvi (Ed.), Precambrian Continental Crust and its Economic Resources. Development of Precambrian Geology, Elsevier, pp.327-348.

  • ROY, A.B. (2006) Proterozoic lithostratigraphy and Geochronologic framework of the Aravalli Mountains and adjoining areas in Rajasthan and neighbouring states, northwest India. Indian Jour. Geol., v.78, pp.5-18.

  • ROY, A.B. and DAS, A.R. (1985) A study of time relation between movements, metamorphism and granite emplacement in the middle-Proterozoic Delhi Supergroup of Rajasthan. Jour. Geol. Soc. India, v.26, pp.726-733.

  • ROY, A.B. and KRÖNER, A. (1996) Single zircon evaporation ages constraining the growth of the Archaean Aravalli craton, northwestern Indian shield. Geol. Mag. v.133, pp.333-342.

  • ROY, A.B. and RATHORE, S. (1999) Tectonic setting and model of evolution of granulites of the Sandmata Complex, the Aravalli Mountain, Rajasthan. In: International Symposium on Charnockite and Granulite Facies Rocks, Geologists Assoc. Tamil Nadu, pp.111-126.

  • ROY, A.B., KRÖNER, A. and LAUL, V. (2001) Detrital zircons constraining basement age in a late Archaean greenstone belt of south-eastern Rajasthan, India. Curr. Sci., v.81, pp.407-410.

  • ROY, A.B., KRÖNER, A., BHATTACHARYA, P.K. and RATHORE, S. (2005) Metamorphic evolution and zircon geochronology of early Proterozoic granulites in the Aravalli Mountains of northwestern India. Geol. Mag., v.142, pp.287-302.

  • ROY, A.B., NAGORI, D., GOLANI, P.R., DHAKAR, S.P. and CHOUDHURI, R. (1980) Structural geometry of the phosphorite bearing Aravalli rocks around Jhamarkortra Mines area, Udaipur dist., Rajasthan. Indian Jour. Earth Sci., v.7, pp.191-202.

  • SANDIFORT, M, and POWELL, R. (1986) Deep crustal metamorphism continental extension modern and ancient examples. Earth Planet. Sci. Lett., v.79, pp.151-158.

  • SAHA, L., BHOWMIK, S.K., FUKUOKA, M. and DASGUPTA, S. (2008) Contrasting episodes of Regional Granulite–Facies metamorphism in enclaves and host gneisses from the AravalliDelhi Mobile Belt, NW India. Jour. Petrol., v.49, pp.107-128.

  • SARANGI, S., GOPALAN, K., ROY, A.B., SREENIVAS, B. and DAS SHARMA, S., (2006) Pb-Pb age of the carbonates of Jhamarkotra Formation constraining the age of the Aravalli Supergroup, Rajasthan. Jour. Geol. Soc. India, v.67(4), pp.442-446.

  • SARKAR, G., BARMAN, T.R. and CORFU, F., (1989) Timing of continental arc magmatism in northwest India: evidence from U–Pb geochronology. Jour. Geol. v.97, pp.607-612.

  • SHARMA, R.S. (1988) Patterns of metamorphism in the Precambrian rocks of the Aravalli mountain belt. In: A.B. Roy (Ed.), Precambrian of the Aravalli Mountains, Rajasthan, India. Mem. Geol. Soc. India, no.7, pp.33-76.

  • SHARMA, R.S. (2010) Cratons and Fold Belts of India, Lecture Notes in Earth Sciences, v.127, Springer Verlag, 304p.

  • SCHLEICHER, H., TODT, W., VILADKAR, S.G. and SCHIMDT, F. (1997) Pb-Pb age determinations of the Newania and Savattur carbonatites of India: evidence for multiple stage histories. Chem. Geol., v.140, pp.261-273.

  • SRIVASTAVA, D.C. (2001) Deformation Pattern in the Precambrian Basement around Masuda, central Rajasthan, India. Jour. Geol. Soc. India. v.57, pp.197-222.

  • SRIVASTAVA, D.C., SAHAY, A., KUMAR, D. and MUKHERJEE, P. (2004) Origin and ductile shearing of the microgranitoid enclaves in the granulite granitoid terrane around Devariya-Bandanwara area, central Rajasthan. Jour. Geol. Soc. India, v.63, pp.587-610.

  • TORSVIK, T.H., CHARTER, L.M., ASHWAL, L.D. BHUSHAN, S.K., PANDIT, M.K., and JAMVEIT, B. (2001) Rodinia redefined or obscured: palaeomagnetism of the Malaniigneous suite (NW India). Precambrian Res., v.108, pp.319-333.

  • TUCKER, R.D., ASHWAL, L.D., and TORSVIK, T.H.M (2001) U-Pb geochronology of Sychelles granitoids: Neoproterozoic continental arcfragment. Earth Planet. Sci. Lett., v.187, pp.27-38.

  • VOLPE, A. M. and MACDAUGALL, J. D. (1990) Geochemistry and isotope characteristics of mafic (Phulad Ophiolite) and related rocks in the Delhi Supergroup, Rajasthan, India: Implications for rifting in the Proterozoic. Precambrian Res., v.48, pp.167-191.

  • WIEDENBECK, M. and GOSWAMI, J.N. (1994) An ion-probe single zircon 207Pb/206Pb age from Mewar Gneiss at Jhamarkotra, Rajasthan. Geochim. Cosmochim. Acta v.58, pp.2135-2141.

  • WIEDENBECK, M., GOSWAMI, J.N. and ROY, A.B. (1996a) Stabilization of the Aravalli craton of the northwestern India at 2.5 Ga.: An ion-microprobe zircon study. Chem. Geol., v.129, pp.325-340.

  • WIEDENBECK, M., GOSWAMI, J.N. and ROY, A.B. (1996b) An ion microprobe study of single zircons from Amet granite, Rajasthan. Jour. Geol. Soc. India, v.48, pp.127-137.


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  • Tectono-Metamorphic and Geochronologic Studies from Sandmata Complex, Northwest Indian Shield: Implications on Exhumation of Late-Palaeoproterozoic Granulites in an Archaean-Early Palaeoproterozoic Granite-Gneiss Terrane

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Authors

A. B. Roy
Department of Geology, Presidency University, Kolkata 700 073, India
Alfred Kroener
Institut fur Geowissenchaften, Universitaet Mainz, 55099 Mainz, Germany
Sanjeev Rathore
3/2 Kanji Ka Hata, Udaipur 313 001, India
Vivek Laul
10/805, Malviya Nagar, Jaipur 302017, India
Ritesh Purohit
Department of Geology, Government College, Sirohi 327001, India

Abstract


Several bodies of granulites comprising charnockite, charno-enderbite, pelitic and calc-silicate rocks occur within an assemblage of granite gneiss/granitoid, amphibolite and metasediments (henceforth described as banded gneisses) in the central part of the Aravalli Mountains, northwestern India. The combined rock assemblage was thought to constitute an Archaean basement (BGC-II) onto which the successive Proterozoic cover rocks were deposited. Recent field studies reveal the occurrence of several bodies of late-Palaeoproterozoic (1725 and 1621 Ma) granulites within the banded gneisses, which locally show evidence of migmatization at c. 1900 Ma coeval with the Aravalli Orogeny. We report single zircon 'evaporation' ages together with information from LA-ICP-MS U-Pb zircon datings to confirm an Archaean (2905 - ca. 2500 Ma) age for the banded gneisses hosting the granulites. The new geochronological data, therefore, suggest a polycyclic evolution for the BGC-II terrane for which the new term Sandmata Complex is proposed. The zircon ages suggest that the different rock formations in the Sandmata Complex are neither entirely Palaeoproterozoic in age, as claimed in some studies nor are they exclusively Archaean as was initially thought. Apart from distinct differences in the age of rocks, tectono-metamorphic breaks are observed in the field between the Archaean banded gneisses and the Palaeoproterozoic granulites. Collating the data on granulite ages with the known tectono-stratigraphic framework of the Aravalli Mountains, we conclude that the evolution and exhumation of granulites in the Sandmata Complex occurred during a tectono-magmatic/metamorphic event, which cannot be linked to known orogenic cycles that shaped this ancient mountain belt. We present some field and geochronologic evidence to elucidate the exhumation history and tectonic emplacement of the late Palaeoproterozoic, high P-T granulites into the Archaean banded gneisses. The granulite-facies metamorphism has been correlated with the thermal perturbation during the asymmetric opening of Delhi basins at around 1700 Ma.

Keywords


Geochronology, Granulite Exhumation, Sandmata Complex, Aravalli Mountains.

References