Heterogeneity in crustal structure across the Southern Granulite Terrain (SGT): Inferences from an analysis of gravity and magnetic fields in the Periyar plateau and adjoining areas

Gondwana Research

Volumn 10, Issue 1-2, 2006, Pages 18-28

  Ajayakumar, P ^a   John Kurian, P ^b   Rajendran, S ^a   Radhakrishna, M ^a   Nambiar, C G ^a   Mahadevan, T M ^c  

^a Department of Physics   (India)

^b NATIONAL CENTRE FOR ANTARCTIC AND OCEAN RESEARCH   (India)

^c Sree Bagh   (India)

Author keywords

Crustal structure; Gravity anomalies; Periyar plateau; Proterozoic; Southern Granulite Terrain

Indexed keywords

AEROMAGNETIC SURVEY; CRUSTAL STRUCTURE; GRAVITY FIELD; HETEROGENEITY; MAGNETIC ANOMALY; MAGNETIC FIELD; MOHO; RECONSTRUCTION; TERRAIN;

INDIA; MADURAI BLOCK; TAMIL NADU;

EID: 33745641939     PISSN: 1342937X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.gr.2005.11.011     Document Type: Article

References (34)

1. Bartlett J.M., Harris N.B.W., Hawkesworth C.J., and Santosh M. New isotope constraints on the crustal evolution of South India and Pan-African granulite metamorphism. Mem. Geol. Soc. India 34 (1995) 391-397
2. Bhaskar Rao Y.J., Janardhan A.S., Kumar T., Narayana B.L., Dayal A.M., Taylor P.N., and Chetty T.R.K. Sm-Nd model ages and Rb-Sr isotropic systematics of charnockites and gneisses across the Cauvery shear zone of southern India: implications for the Archean-Neoproterozoic terrain boundary in the Southern Granulite Terrain. In: Ramakrishnan M. (Ed). In Tectonics of Southern Granulite Terrain: Kuppam-Palani Geotransect. Geol. Soc. of India, Mem. vol. 50 (2003)
3. Cenki B., Braun I., and Broker M. Evolution of the continental crust in the Pan-African mobile belt of southern most India: evidence from Nd isotope mapping combined with U-Pb and Rb-Sr geochronology. Precambrian Res. 134 (2004) 1-20
4. Chetty T.R.K., Bhaskar Rao Y.J., and Narayana B.L. A structural cross-section along Krishnagiri-Palani corridor, Southern Granulite Terrain of India. Mem. Geol. Soc. India 50 (2003) 255-277
5. Drury S.A., and Holt R.W. The tectonic framework of the South Indian craton: a reconnaissance involving LANDSAT imagery. Tectonophysics 65 (1980) T1-T15
6. Fermor L.L. An attempt at the correlation of the ancient schistose formations of Peninsular India. Mem. Geol. Surv. India 70 (1936) 1-52
7. Fountain D.M., and Salisbury M.H. Exposed cross-sections through the continental crust; implications for crustal structure, petrology and evolution. Earth Planet. Sci. Lett. 56 (1981) 263-277
8. Gopalakrishnan K. An overview of Southern Granulite Terrain, India - constraints in reconstruction of Precambrian assembly of Gondwanaland. Gondwana Nine vol. 2 (1996), Oxford and IBH, New Delhi 1003-1026
9. GSI (Geological Survey of India). Geological and Mineral Map of Kerala and Tamilnadu (1995)
10. Harikumar P., Rajaram M., and Balakrishnan T.S. Aeromagnetic study of Peninsular India. Proc. Indian Acad. Sci., A Earth Planet. Sci. 109 3 (2000) 381-391
11. Harris N.B.W., Santosh M., and Taylor P.N. Crustal evolution in South India: constraints from Nd isotopes. J. Geol. 102 (1994) 139-150
12. Jayananda M., and Peucat J.J. Geochronological framework of southern India. Gondwana Res., Mem. 3 (1996) 53-75
13. Jayananda M., Janardhan A.S., Sivasubramanian P., and Peucat J.J. Geochronologic and isotopic constraints on granulite formation in the Kodaikanal area, southern India. Mem. Geol. Soc. India 34 (1995) 373-390
14. Karunakaran C., and Mahadevan T.M. Some aspects of the seismicity of peninsular shield. Indian J. Power River Val. Dev. (1971) 15-24 (Sp.number Proc Symp. Koyna earthquake and related)
15. Mahadevan, T.M., 1964. The charnockites and related gneiss in parts of the western ghats in Trichur district, Kerala. XXII International Geological Congress India, Proceedings of section X, Archaean and Pre-Cambrain Geology, 482-491.
16. Mahadevan, T.M., 1998. A unitary model of evolution of the Precambrian Indian shield. Inter. Sympo. on charnockite and granulite facies rocks. Geol. Asson. Tamil Nadu, 153-174.
17. Mahadevan T.M. Geological Evolution of South Indian shield-constraints on modelling. Mem. Geol. Soc. India 50 (2003) 25-46
18. Mahadevan T.M. Kuppam-Palani transect programme and new insights into continental evolution. Mem. Geol. Soc. India 53 (2003) 99-114
19. Nair, M.M., Vidhyadharan, K.T., Pawar, S.D., Sukumaran, P.V., Murthy Y.G.K., 1976. The structural and stratigraphic relationship of the schistose rocks and associated igneous rocks of the Tellicherry-Manantoddy area, Cannanore district, Kerala India Mineral, 16, 89-100.
20. NGRI. Isostatic Gravity Anomaly Map of India (1978), National Geophysical Research Institute, Hyderabad
21. Radhakrishna B.P. Suspect tectono-stratigraphic terrane elements in the Indian subcontinent. J. Geol. Soc. India 34 (1989) 1-24
22. 40Ar isotope correlation ages of dyke swarms in central Kerala, India: tectonic implications. Earth Planet. Sci. Lett. 121 (1994) 213-226
23. Radhakrishna T., Poomachandra Rao G.V.S., Mitchell J.G., and Venkatesh A.V. Proterozoic basic dyke activity in Kerala along the western continental margin of India. J. Geol. Soc. India 27 (1986) 245-253
24. Radhakrishna M., Kurian P.J., Nambiar C.G., and Murty B.V.S. Nature of the crust below the Southern Granulite Terrain (SGT) of Peninsular India across the Bavali shear zone based on analysis of gravity data. Precambrian Res. 124 (2003) 21-40
25. Raith M., Rasse P., Ackermand D., and Lal R.K. Regional geothermobarometry in the granulite facies terrain of South India. Trans. R. Soc. Edinb. Earth Sci. 73 (1983) 221-224
26. Rajaram M., and Anand S.P. Crustal structure of South India from aeromagnetic data. Journal of the Virtual Explorer 12 (2003) 72-82
27. Ramachandran C. P-wave velocity in granulites from South India: implications for the continental crust. Geophysics 201 (1992) 187-198
28. Reddy P.R., Rajendra Prasad B., Vijaya Rao V., Sain K., Prasada Rao P., Khare P., and Reddy M.S. Deep seismic reflection and refraction/wide-angle reflection studies along Kuppam-Palani transect in the Southern Granulite Terrain of India. Mem. Geol. Soc. India 50 (2003) 79-106
29. Santosh M. Alkaline plutons, decompression granulites and late Proterozoic CO2 influx in Kerala, South India. Mem. Geol. Soc. India 15 (1989) 177-188
30. Santosh M., Iyer, Vasconcellos M.B.A., and Enzweiler J. Late Precambrian alkaline plutons in southwest India: geochronologic and rare earth element constraints on Pan-African magmatism. Lithos 24 (1989) 6S-79S
31. Santosh M., Yokoyama K., Biju Sekhar S., and Rogers J.J.W. Multiple tectonothermal events in the granulite blocks of southern India revealed from EPMA dating: implications on the history of super continents. Gondwana Res. 6 1 (2003) 29-63
32. Singh A.P., Mishra D.C., Vijaya Kumar V., and Vyaghreswara Rao M.B.S. Gravity-magnetic signatures and crustal architecture along Kuppam-Palani geotransect, South India. In: Ramakrishnan M. (Ed). Tectonics of Southern Granulite Terrain: Kuppam-Palani Geotransect. Geol. Soc. of India, Mem. vol. 50 (2003)
33. Swaminath J., Ramakrishnan M., and Viswanatha M.N. Dharwar stratigraphic model and Karnataka craton evolution. Rec. Geol. Surv. India 107 (1976) 149-175
34. Webring M. Semi-automatic Marquardt inversion of gravity and magnetic profiles. U.S. Geological Survey Open-file Report OF-122 (1985)