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

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Mineral Chemistry and Geochemistry of the Mesocratic Quartz Syenite Intrusions from Vikurthi and Kotappakonda, Guntur District, Andhra Pradesh


Affiliations
1 Department of Geology, Kakatiya University, Warangal-506 009, India
2 Department of Geology, Osmania University, Hyderabad-500 007, India
3 National Geophysical Research Institute, Hyderabad-500007, India
4 Department of Earth Sciences, Bullard Laboratories, Madingley Rise; Cambridge, CB2 3EQ, India
     

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The paper presents the mineral analyses and the major, trace and rare earth element geochemistry of the subalkaline syenites from Vikurthi and Kotappakonda in the Guntur district of Andhra Pradesh. A comprehensive model is proposed wherein these and other similar rocks from the Cuddapah intrusive province are envisaged as the differentiated products of an intermediate magma of trachybasaltic composition, which, in turn, has been derived by the differentiation of a parental gabbro magma.

Keywords

Geochemistry, Syenites, Igneous Petrology, Guntur District, Andhra Pradesh.
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  • Mineral Chemistry and Geochemistry of the Mesocratic Quartz Syenite Intrusions from Vikurthi and Kotappakonda, Guntur District, Andhra Pradesh

Abstract Views: 200  |  PDF Views: 4

Authors

V. Madhavan
Department of Geology, Kakatiya University, Warangal-506 009, India
M. Srinivas
Department of Geology, Osmania University, Hyderabad-500 007, India
J. Mallikharjurna Rao
National Geophysical Research Institute, Hyderabad-500007, India
N. V. Chalapathi Rao
Department of Earth Sciences, Bullard Laboratories, Madingley Rise; Cambridge, CB2 3EQ, India

Abstract


The paper presents the mineral analyses and the major, trace and rare earth element geochemistry of the subalkaline syenites from Vikurthi and Kotappakonda in the Guntur district of Andhra Pradesh. A comprehensive model is proposed wherein these and other similar rocks from the Cuddapah intrusive province are envisaged as the differentiated products of an intermediate magma of trachybasaltic composition, which, in turn, has been derived by the differentiation of a parental gabbro magma.

Keywords


Geochemistry, Syenites, Igneous Petrology, Guntur District, Andhra Pradesh.