Contributions to Mineralogy and Petrology

, Volume 39, Issue 3, pp 247–266 | Cite as

Petrology and geochemistry of the igneous complex of Mount Girnar, Gujarat, India

  • Mihir K. Bose
Article

Abstract

The Girnar massif of Kathiwar plateau, Western India, occurs within the Deccan volcanic province and manifests a wide range of fractional crystallisation of the parent basic magma. Mineralogical variation in the suite comprising: gabbro-diorite-lamprophyric rock-nepheline syenite, has been studied in detail. The alkalinity of the suite is pronounced after crystallisation of gabbro and increases with fractionation of the magma. The history of fractional crystallisation has been influenced by growing water content of the magma followed by a depletion of water in the final residual liquid. Silicic porphyries developed in close spatial association with the Girnar massif, are established to have no genetic relation with the alkalic suite. Chemical variation for both major and minor elements in the suite is discussed.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bambauer, H. U., Corlett, M., Eberhard, E., Biswanathan, K.: Diagrams for the determination of plagioclases using X-ray powder diagram. Schweiz. Mineral. Petrog. Mitt. 47, 1–24 (1967).Google Scholar
  2. Barth, T. F. W.: Additional data for the two feldspar Goethermometer. Lithos 1, 305–306 (1968).Google Scholar
  3. Bose, M. K.: Petrology of the intrusive alkalic suite of Koraput, Orissa. J. Geol. Soc. India 11, 99–126 (1970).Google Scholar
  4. Bose, M. K.: Petrology of the nepheline syenite of Mount Girnar, Gujrat. Lithos 4, 357–366 (1971).Google Scholar
  5. Bose, M. K.: Deccan basalts. Lithos 5, 133–147 (1972).Google Scholar
  6. Bose, M. K., Sankaran, A. V., Bhattacharya, T. K.: The behaviour of some trace elements in the alkalic suite of Koraput, Orissa. J. Geol. Soc. India 10, 167–176 (1969).Google Scholar
  7. Desai, S. D.: Geology of the Girnar hills, Gujrat. J. Boroda Univ. 13, 13–20 (1964).Google Scholar
  8. Fedden, F.: The geology of the Kathiwar Peninsula in Guzerat. Mem. Geol. Surv. India 21, 1–64 (1884).Google Scholar
  9. Ferguson, J., Currie, K. L.: Evidence of liquid immiscibility in alkaline ultrabasic dykes at Callander Bay, Ontario. J. Petrol. 12, 561–588 (1971).Google Scholar
  10. Gast, P. W.: Terrestrial ratio of potassium to rubidium and the composition of the earth's mantle. Science 147, 858–860 (1965).Google Scholar
  11. Heier, K. S.: Trace elements in feldspars—a review. Norsk. Geol. Tidsskr. 42, 415–454 (1962).Google Scholar
  12. Hortsman, E. L.: The distribution of lithium, rubidium and caesium in igneous and sedimentary rocks. Geochim. Cosmochim. Acta 12, 1–28 (1957).Google Scholar
  13. Jhingran, A. G.: Petrographic studies of rocks from Girnar hills. Rec. Geol. Surv. India 83, 501–515 (1954).Google Scholar
  14. Jones, J. B.: Order in alkali feldspars. Nature 210, 1352–1353 (1966).Google Scholar
  15. Kaaden, Van der, G.: Optical studies on natural plagioclase feldspars with high- and low-temperature optics. Diss. Utrecht Univ. 1–105 (1951).Google Scholar
  16. Le Bas, M. J.: The geochemistry of plagioclases from the gabbroic rocks of the Carlingford complex, Ireland. Studies in earth sciences. West. Comm. Vol. p. 64–78. Today: Tomorrow's Publishers 1971.Google Scholar
  17. Le Maitre, R. W.: Chemical variation within and between volcanic rock series-a statistical approach. J. Petrol. 9, 220–252 (1968).Google Scholar
  18. Lessing, P., Decker, R. W., Reynolds, R. C.: Potassium and rubidium distribution in Hawaiian lavas. J. Geophys. Res. 68, 399–462 (1963).Google Scholar
  19. Mathur, K. K., Dubey, V. S., Sharma, N. L.: Magmatic differentiation in Mount Girnar. J. Geol. 34, 289–307 (1926).Google Scholar
  20. Naganna, C.: Petrology of the rocks of St. Mary islands near Malpe, S. Kanara Dist., Mysore. J. Geol. Soc. India 7, 110–117 (1966).Google Scholar
  21. Nockolds, S. R.: The behaviour of some trace elements during fractional crystallisation of magma. Geochim. Cosmochim. Acta 30, 267–278 (1966).Google Scholar
  22. Nockolds, S. R., Mitchell, R. L.: The geochemistry of some Caledonian plutonic rocks: a study on the relationship between the major and trace elements of igneous rocks and their minerals. Trans. Roy. Soc. Edinburgh 61, 533–575 (1948).Google Scholar
  23. Poldervaart, A., Sukheswala, R. N.: Deccan basalts of Bombay area, India. Bull. Geol. Soc. Am. 69, 1475–1494 (1958).Google Scholar
  24. Ringwood, A. E.: Genesis of basalt trachyte association. Beitr. Mineral. Petrog. 6, 346–351 (1959).Google Scholar
  25. Subbarao, S.: The geology of the igneous complex of the Girnar hills, Gujrat. Report, 22nd Inter. Geol. Congr. Pt. 7, 42–60 (1964).Google Scholar
  26. Taylor, S. R.: The application of trace element data to problems in petrology. Phys. Chem. Earth 6, 133–213 (1965).Google Scholar
  27. Turekian, K. K., Wedephol, K. H.: Distribution of the elements in some major units of the earth's crust. Bull. Geol. Soc. Am. 72, 175–192 (1961).Google Scholar
  28. Turner, F. J., Verhoogen, J.: Igneous and metamorphic petrology. New York: McGraw-Hill 1962.Google Scholar
  29. Wilkinson, J. F. G.: Clinopyroxenes of alkali olivine basalt magma. Am. Mineralogist 41, 724–743 (1956).Google Scholar
  30. Williams, H., Turner, F. J., Gilbert, C. M.: Petrography. San Francisco: W. H. Freeman 1958.Google Scholar
  31. Wright, T. L.: X-ray and optical study of alkali feldspar. II. An X-ray method for determining the composition and structural state. Am. Mineralogist 53, 88–104 (1968).Google Scholar
  32. Yoder, H. S., Jr., Sahama, Th. G.: Olivine X-ray determinative curve. Am. Mineralogist 42, 475–491 (1957).Google Scholar
  33. Yoder, H. S. Jr., Tilley, C. E.: Origin of basalt magmas: an experimental study of natural and synthetic rock. J. Petrol. 3, 342–532 (1962).Google Scholar
  34. Zwaan, P. C.: On the determination of pyroxene by X-ray powder diagram. Leidse Geol. Mededel. 19, 167–276 (1954).Google Scholar

Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • Mihir K. Bose
    • 1
  1. 1.Department of GeologyPresidency CollegeCalcuttaIndia

Personalised recommendations