Incompatible Trace Element Geochemistry of Archaean Metavolcanic Rocks from the Bababudan Volcanic-Sedimentary Belt, Karnataka

Authors

  • Y. J. Bhaskar Rao
     National Geophysical Research Institute, Hyderabad 500007
  • S. A. Drury
     Department of Earth Sciences, The Open University, Milton Keynes

Abstract

Data on the incompatible trace elements Ti, Rb, Sr, Ba, Zr, Nb, Y, rare-earth elements, Sc, Hf, Ta and Th are presented for basalts, andesites and rhyodacites from the Archaean Bababudan greenstone belt. All samples are genetically related and show general calc-alkaline affinities. The parent magma is proposed to have been formed by about 15 per cent partial melting of mantle at shallow depths. The source mantle is shown to have been enriched in light REE and Zr relative to primitive mantle with 2-3 times chondritic abundances. The parent magma evolved by progressive fractionation of, first olivine and pyroxene to produce incompatible element-enriched alld Cr, Ni and Co depleted tholeiites, which were then accompanied by plagioclase feldspar and possibly magnetite to generate the andesites and rhyodacites. Standard tectonic characterization parameters do not give consistent results for this suite, and until more is known about overall structure, stratigraphy and relative ages within the South Indian Archaean craton, a precise setting cannot be ascribed.

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Volume 23, Issue 1, January 1982

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Published

1982-01-01

How to Cite

Bhaskar Rao, Y. J., & Drury, S. A. (1982). Incompatible Trace Element Geochemistry of Archaean Metavolcanic Rocks from the Bababudan Volcanic-Sedimentary Belt, Karnataka. Journal of Geological Society of India, 23(1), 1–12. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/64913

References

ANANTA IYER, G. V., VASUDEV, V. N. and JAYARAM, S., (1980) Rare-earth element geochemistry of metabasalts from the Kolar and Hutti gold-bearing volcanic belts Karnataka craton, India. Jour. Geol. Soc. India, v. 21, pp. 603-608.

BECKINSALE, R. D., DRURY, S. A. and HOLT, R. W., (1980) 3360 Myr old gneisses from the South Indian craton. Nature, v. 283, pp. 469-470.

BHASKAR RAO, Y. J., (1980) Geology and geochemistry of metavolcanics and associated rock types from the Bababudan belt, and the late Archaean crustal evolution in Karnataka craton. Unpublished Ph.D. thesis, Osmania University, Hyderabad, India.

BHASKAR RAO, Y. J. and NAQVI, S. M., (1978) Geochemistry of metavolcanics from the Bababudan schist belt; a late Archaean/early Proterozoic volcano-sedimentary pile from India. In: Archaean Geochemistry, Eds. B. F. Windley and S. M. Naqvi. Elsevier Amsterdam, pp. 325-341.

CONDIE, K. C., (1976) Trace element geochemistry of Archaean greenstone belts. Earth Science Reviews. v. 12, pp. 393-417.

CONDIE, K. C., VILJOEN, M. J. and KABLE, E. J. D., (1977) Effects of alteration on element distributions in Archaean tholeiites from the Barberton greenstone belt, South Africa. Contr. Mineral. Petrol., v. 64, pp. 75-89.

DRAKE, M. J. and WEILL, D. F., (1975) The partitioning of Sr, Ba, Ca, Y, Eu 2+, Eu3+ and other REE between plagioclase feldspar and magmatic liquid: An experimental study. Geochim. Cosmochim. Acta, v. 39, pp. 689-712.

DRURY, S. A. and HOLT, R. W., (1980) The tectonic framework of the South Indian craton: a reconnaissance involving Landsat imegery. Tectonophysics, v. 65, pp. T1-T15.

FREY, F. A., BRYAN, W. B. and THOMPSON, G., (1974) Atlantic ocean floor: geochemistry and petrology of basalts from legs 2 and 3 of the deep-sea drilling project. Jour. Geophys. Res., v. 79, pp. 5507-27.

GROSSMAN, L., GANAPATHY, R. and DAVIS, A. M., (1977) Trace elements in the Allende meteorite-III. Coarse grained inclusions revisited. Geochim. Cosmochim. Acta, v. 41, pp. 1647-1664.

HAWKESWORTH, C. J. and O'NIONS, R. K., (1977) The petrogenesis of some Archaean volcanic rocks from Southern Africa. Jour. Petrology, v. 18, pp. 487-520.

JAHN, B. M., AUVRAY, B., BLAIS, S., CAPDEVILA, R., CORNICHET, J., VIDAL, F. and HAMEURT, J., (1980) Trace element geochemistry and petrogenesis of Finnish greenstone belts. Jour. Petrology, v. 21, pp. 201-244.

MURALI, A. V., PAWASKAR, P. B., REDDY, G. I., SUBBARAO, K. V., VASUDEV, V. N. and SANKARDAS, M., (1979) Petrogenetic significance of rare-earth element patterns of selected samples of Tngaldhal metavolcanics, Karnataka State, India, Consortium Studies No.1, Jour. Geol. Soc. India, v. 20, pp. 334-338.

NAKAMURA, N., (1974) Determination of REB, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochim. Cosmochim. Acta, v. 38, pp, 757-775.

NESBITT, R. W. and SUN, S. S., (1976) Geochemistry of Archaean spinifex textured peridotites and magnesian and low magnesian tholeiites. Earth Planet. Sci. Lett., v. 31, pp. 433-453.

PAUL, D. K., POTTS, P. J., GIBSON, I. L. and HARRIS, P. G., (1975) Rare-earth abundances in Indian Kimberlite. Earth Planet. Sci. Lett., v. 25, pp. 151-158.

PEARCE, J. A. and CANN, J. R., (1973) Tectonic setting of basic volcanic rocks determined using trace element analyses. Earth Planet. Sci. Lett., v. 19, pp. 290-300.

PEARCE, J. A. and FLOWER, M. F. J., (1977) The relative importance of petrogenetic variables in magma genesis at accreting plate margins: a preliminary investigation. Jour. Geol. Soc. London, v. 134, pp. 103-127.

PEARCE, J. A. and NORRY, M. J., (1979) Petrogenetic implications of Ti, Zr, Y and Nb variations in volcanic rocks. Cntrib. Mineral Petrol., v. 69, pp. 33-47.

PEARCE, J. A., ALABASTER, T., SHELTON, A. W. and SEARLE, M. P., (1981) The Oman ophiolite as a Cretaceous arc-basin complex: evidence and implications. Phil. Trans. Roy, Soc. London, v. A300, pp. 299-317.

SHIMUZU, N. and KUSHIRO, I., (1975) The partitioning of rare-earth elements between garnet and liquid at high pressure: preliminary experiments. Geophys. Res. Lett., v. 2, pp. 413-416.

SUN, S. S. and NESBITT, R. W., (1977) Chemical heterogeneity of the Archaean mantle, composition of the Earth and mantle evolution. Earth Planet. Sci. Lett., v. 35, pp. 429-448.

SUN, S. S. and NESBITT, R. W., (1978) Petrogenesis of Archaean ultrabasic and basic volcanics from rare-earth elements. Contrib. Mineral. Petrol., v. 65, pp. 301-325.

SWAMI NATH, J., RAMAKRISHNAN, M. and VISWANATHA, M. N., (1976) Dharwar stratigraphic model and Karnataka craton evolution. Rec. Geol. Surv. India, v. 107, pp. 149-175.

TARNEY, J., SAUNDERS, A. D., WEAVER, S. D., DONNELLAN, N. C. B. and HENDRY, G. L., (1978) Minor element geochemistry of basalts from Leg 49. North Atlantic Ocean. In: Initial Report of the Deep Sea Drilling Project 49, Eds. J. R. Cann, B. Luyendyk and others. U.S. Government Printing Office, Washington, pp. 657-691.

THORPE, R. S., FRANCIS, P. W. and MOORBATH, S., (1979) Rare-earth and strontium isotope evidence concerning the petrogenesis of North Chilean ignimbrites. Earth Planet. Sci. Lett., v. 42, pp, 359-367.

WENDLANDT, R. F. and HARRISON, W. J., (1979) Rare-earth partitioning between immiscible carbonate and silicate liquids and CO2 vapour: results and implications for the formation of light rare-earth-enrichcd rocks. Contr. Mineral. Petrol., v. 69, pp. 409-419.

WOOD, D, A., (1980) The application of a Th-Hf-Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic province. Earth Planet. Sci. Lefl., v. 50, pp. 11-30.

WOOD, D. A., JORON, J. L. and TREUIL, M., (1979) A re-appraisal of the use of trace elements to classify and discriminate between magma series erupted in different tectonic settings. Earth Planet. Sci. Lett., v. 45, pp. 326-336.

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