Refine your search
Collections
Co-Authors
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Swarnkar, Vikas
- Petrogenesis of Gabbro and Orthopyroxene Gabbro from the Phenai Mata Igneous Complex, Deccan Volcanic Province: Products of Concurrent Assimilation and Fractional Crystallization
Abstract Views :357 |
PDF Views:18
Authors
Affiliations
1 Government V.Y.T.PG. Autonomous College, Durg, Chhattisgarh, IN
2 Centre of Advance Study in Geology, Banaras Hindu University, Varanasi – 221 005, IN
1 Government V.Y.T.PG. Autonomous College, Durg, Chhattisgarh, IN
2 Centre of Advance Study in Geology, Banaras Hindu University, Varanasi – 221 005, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 6 (2011), Pagination: 501-509Abstract
We report the occurrence of orthopyroxene gabbro from the Phenai Mata Igneous Complex (containing thoeliitic and alkaline rocks) that occur within Deccan Traps. The P-T calculations based on two pyroxene thermometry vary from 8.5±1.0 kbar and 963±39 °C. These gabbroic rocks exhibit high Mg# (0.67 to 0.71). But their primary magma signature can be negated due to their high SiO2 ( > 50 wt %), low Ni (32-35 ppm) and Cr (105-182 ppm) contents. Further, simple fractional crystallization was not responsible for the modification of the magma. Modeling carried out using trace element concentrations revealed that concurrent assimilation and fractional crystallization (AFC) was responsible for the genesis of these rocks. Small pods of magma could have accumulated in the crustal portions and concurrent assimilation and fractional crystallization have taken place in the generation of gabbro and orthopyroxene gabbro in the present study area.Keywords
Orthopyroxene, Deccan Traps, Concurrent Assimilation and Fractional Crystallization, Gabbro, Phenai Mata.
References
- ANDERSEN, D.J. and LINDSLEY, D.H. (1985) New (and final!) models for the Ti-magnetite/ilmenite geothermometer and oxygen barometer. Abstract AGU 1985 Spring Meeting Eos Transactions. Amer. Geophys. Union, v.66 (18), p.416.
- BASU, A.R., RENNE, P.R., DAS GUPTA, D.K., TEICHMA, F. and POREDA, R.J. (1993) Early and late alkali igneous pulses and a high - 3He plume origin for the Deccan flood basalts. Science, v.261, pp.902-906.
- BEANE, J.E. and HOOPER, P.R. (1988) A note on the picrite basalts of the western Ghats, Deccan traps, India. In : Subbaro K. V (Ed) Deccan flood basalts. Geol. Soc. of India, Memoir, v.10, pp.117-133.
- CHANDRASEKHARAM, D., VASELLI, O., SHETH, H.C. and KESHAV, S. (2000) Petrogenetic significance of ferro-enstatite orthopyroxene in basaltic dikes from the Tapi rift, Deccan flood basalt province, India. Earth Planet. Sci. Lett., v.179, pp.469- 476.
- CHANDRASEKHARAM, D. and VINOD, K.C. (2000) Clinopyroxinite xenoliths from Deccan Trap lavas of Kutch and Mumbai. Curr. Sci., v.78, pp.607-610.
- CHENET, A.L., QUIDELLEUR, X., FLUTEAU, F., COURTILLOT, V. and Bajpai, S. (2007) 40K-40Ar dating of the main Deccan large igneous province: further evidence of KTB age and short duration. Earth Planet. Sci. Lett., v.263, pp.1-15.
- CLAESON, D.T. and MEURER, W.P. (2004) Fractional crystallization of hydrous basaltic "arc-type" magmas and the formation of amphibole-bearing gabbroic cumulates, Contrib. Mineral. Petrol., v.147, pp.288-304.
- DEER, W.A., HOWIE, R.A. and ZUSSMAN, J. (1992). An introduction to Rock-forming minerals, 2nd ed. New York, Wiley.
- DE PAOLO, D.J. (1981) Trace element and isotopic effects of combined wallrock assimilation and fractional crystallisation. Earth Planet. Sci. Lett., v.53, pp.189-202.
- GREENOUGH, J.D., HARI, K.R., CHATTERJEE, A.C. and SANTOSH, M. (1998) Mildly alkaline basalts from Pavagadh Hill, India: Deccan flood basalts with an asthenospheric origin. Mineral. Petrol., v.62, pp.223-245.
- GWALANI, L.G., ROCK, N.M.S., CHANG, W.J., FERNANDEZ, S., ALLEGRE, C.J. and PRINZOHOFER, A. (1993) Alkaline rocks and carbonatites of Amba Dongar and adjacent Areas, Deccan Igneous Province. Gujarat, India: Geology, petrography and petrochemistry. Mineral. Petrol., v.47, pp.219-253.
- HARI, K.R. (1998) Mineralogical and Petrological Studies of the Lamprophyres around Chhaktalao area, Madhya Pradesh. Jour. Geol. Soc. India., v.51, pp.28-30.
- HARI, K.R. AND SWARNKAR, VIKAS (2011) Petrogenesis of basaltic and doleritic dykes from Kawant, Chhotaudepur province, Deccan Traps. In: Rajesh Srivastava (Ed.), Dyke swarms: keys to geodynamic interpretations. Springer Publications, pp.283- 299.
- KARMALKAR, N.R., DURAISWAMI, R.A., GRIFFIN, W.L. and O’REILLY, S.Y. (1999) Enigmatic orthopyroxene-rutile-spinel intergrowth in the mantle xenoliths from Kutch, India. Curr. Sci., v.76, pp.687-692.
- KARMALKAR, N.R., GRIFFIN, W.L. and O’REILLY, S.Y. (2000) Ultramafic Xenoliths from Kutch, Northwest India: Plume- Related Mantle Samples? Internat. Geol. Rev., v.42, pp.416- 444.
- KARMALKAR, N.R., KALE, M.G., DURAISWAMI, R.A. and JONALGADDA, M. (2008) Magma underplating and storage in the crustbuilding process beneath the Kutch region, NW India. Curr. Sci., v.94, pp.1582-1588.
- KRISHNAMURTHY, P. and COX, K. G. (1977) Picrite basalts and related lavas from the Deccan Traps of western India. Contrib. Mineral. Petrol., v.62, pp.53-75.
- KRISHNAMURTHY, P., GOPALAN, K. and MACDOUGALL, J.D. (2000) Olivine compositions in picrite basalts and the Deccan volcanic cycle. Jour. Petrol., v.41 No.7, pp.1057-1069.
- KUMAR, SANTOSH (1996a) Geochemical speciation of Phenai Mata Igneous Complex, Baroda district, Gujarat. Jour. Scientific Res., v.46, pp.207-218.
- KUMAR, SANTOSH (1996b) Chemistry of clinopyroxene from subalkaline and alkaline rocks of Phenai Mata igneous complex, Baroda district, Western India. Jour. Geol. Soc. India, v.48, pp.547-558.
- KUMAR, SANTOSH (2003) Pearce Element Ratios applied to model basic rock members of Phenai Mata Igneous Complex, Baroda district, Gujarat. Jour. Geol. Soc. India, v.61, pp.565-572.
- LEPAGE, L.D. (2003) ILMAT: an Excel worksheet for ilmenite- magnetite geothermometry and geobarometry. Computers & Geosciences, v.29, pp.673-678.
- NAKAMURA, N. (1974) Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochim. Cosmochim. Acta., v.38, pp.757-773.
- PENG, Z.X. and MAHONEY, J.J. (1995) Drillhole lavas from the northwestern Deccan Traps, and the evolution of Reunion hotspot mantle. Earth Planet. Sci. Lett., v.134, pp.169-185.
- PUTIRKA, K. (2008) Thermometers and barometers for volcanic systems. In: K. Putrika and F. Tepley (Eds.), Minerals, inclusions and volcanic processes. Reviews in Mineralogy and Geochemistry, Mineral. Soc. Amer., v-69, pp 61-120.
- STOLPER, E. (1980) A phase diagram for Mid-Oceanic Ridge Basalts: Preliminary result and implications for petrogenesis. Contrib. Mineral. Petrol., v.74, pp.13-27.
- STRECKIESEN, A. (1976) To each plutonic rock its proper name. Earth Sci. Rev., v.12, pp.1-33.
- SUKHESWALA, R.N. and SETHNA, S.F. (1969) Layered gabbro of the igneous complex of Phenaimata, Gujarat State. Jour. Geol. Soc. India, v.10, pp.117-187.
- SUKHESWALA, R.N. and SETHNA, S.F. (1973) Oversaturated and undersaturated differentiates in the tholeiitic igneous complex of Phenai Mata,Baroda district,Gujarat state, India. Neues Jahrbuch fur Mineralogie Abhandlungen v.118, pp.159-176.
- SUN, S.S. and MCDONOUGH, W.F. (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geol. Soc. London Spec. Publ., v.42, pp.313-345.
- TORAB, F.M. and LEHMANN, B. (2007) Magnetite - apatite deposits of the Bafq district, Central Iran: apatite geochemistry and monazite geochemistry. Mineral. Mag., v.71, pp.347-367.
- VIJAYA KUMAR and RATHNA, K. (2008) Geochemistry of the mafic dykes in the Prakasam Alkaline Province of Eastern Ghats Belt, India: Implications for the genesis of continental riftzone magmatism. Lithos, v.104, pp.306-326.
- VIJAYA KUMAR, KOPPARAPU, CHAVAN, CHAKRADHAR, SAWANT, SARIPUT, NAGA RAJU, K., KANAKDANDE, PRACHITI, PATODE, SANGITA., DESHPANDE, KRISHNA., KRISHNAMACHARYULU, S.K.G., VAIDESWARAN, T. and BALARAM. V. (2010) Geochemical investigation of a semi-continuous extrusive basaltic section from the Deccan Volcanic Province, India: implications for the mantle and magma chamber processes. Contrib. Mineral. Petrol., v.159, pp.839-862.
- VILADKAR, S.G. (1981) The carbonatites of Amba Dongar, Gujarat, India. Indian Mineralogist, Sukheswala Volume, pp.130-135.
- WILSON, M. (1989) Igneous Petrogenesis, London, Unwin Hyman, p.465.