Precambrian mafic magmatism of Shillong Plateau, Meghalaya and their evolutionary history

Journal of the Geological Society of India

Volumn 73, Issue 1, 2009, Pages 143-152

  Mallikharjuna Rao, J ^a   Poornachandra Rao, G V S ^a   Sarma, K P ^b  

^a NATIONAL GEOPHYSICAL RESEARCH INSTITUTE   (India)

^b GAUHATI UNIVERSITY   (India)

Author keywords

Dykes; Khasi greenstone; Mafic magmatism; Meghalaya; Shillong plateau

Indexed keywords

BASEMENT ROCK; DIABASE; DIKE SWARM; EMPLACEMENT; GNEISS; LOW GRADE METAMORPHISM; MAFIC ROCK; MAGMATISM; MAGNETIZATION; PRECAMBRIAN; PROTEROZOIC; TECTONIC SETTING;

ASIA; EURASIA; INDIA; MEGHALAYA; SHILLONG PLATEAU; SOUTH ASIA;

EID: 60849128229     PISSN: 00167622     EISSN: None     Source Type: Journal    
DOI: 10.1007/s12594-009-0009-9     Document Type: Article

References (28)

1. ACHARYYA, S.K. (2005) Geology and Tectonics of NE India. Jour. Geophys., v.XXVI, No.1, pp.35-49.
2. AGARWAL, N.K. and SARMA, H. (1994) Geology of parts of Mawkynrew block, east Khasi Hills District, Meghalaya. Rec. Geol. Surv. India, v. 127, pt.4, pp. 13-15.
3. BILHAM, R. and GAUR, V.K. (2000) Geodetic contributions to the study of scismotectonics in India. Curr. Sci., v.79, pp.1259-1269.
4. CHATTOPADHYAY, N. and HASHMI, S. (1984) The Sung Valley alkaline ultramafic carbonatite complex, East Khasi and Jaintia Hills Districts, Meghalaya. Rec. Geol. Surv. India, v.113, pp.24-33.
5. DESIKACHAR, O.S-V. (1974) A review of the tectonic and geological history of eastern India in terms of 'plate tectonics' theory. Jour. Geol. Soc. India, v.33, pp. 137-149.
6. EVANS, P. (1964) The tectonic framework of Assam. Jour. Geol. Soc. India, v.5, pp.80-96.
7. FISHER, R.A. (1953) Dispersion on a sphere. Proc. Roy. London, Series A, v.217, pp.295-305.
8. GHOSH, S., CHAKRABORTY, S., BALLA, J.K., PAUL, D.K., SARMA, A., BISHUI, P.K. and GUPTA, S.N. (1991) Geochronology an geochemistry of granite plutons from East Khasi Hills, Meghalaya. Jour. Geol. Soc. India, v.37, pp.331-342.
9. GHOSH, S., CHAKRABORTY, S., BALLA, J.K., PAUL, D.K., SARNIA, A., BISHUI, P.K. and GUPTA, S.N. (1994) New Rb-Sr isotopic ages and geochemistry of granitoids from Meghalaya and their significance in middle to late Proterozoic crustal evolution. Indian Minerals, v.48, No.1&2, No.53.
10. KIRSCHVINK, J.L. (1980) The least- squares line and plane and the analysis of palaeomagnetic data. Jour. Roy Astr. Soc., v.62, pp.699-718.
11. KUMAR, S. (1990) Petrochemistry and geochronology of pink granite from Sonsak, East Garo Hills, Meghalaya. Jour. Geol. Soc. India, v.35, pp.39-45.
12. LE BAS, M.J., LE MAITRE, R.W., STRCKEISEN, A. and ZANETTIN, B. (1986) A chemical classification of volcanic rocks based on the total alkalies-silica diagram. Jour. Petrol., v.27, pp.745-750.
13. MACDONALD, G.A. and KATSURA, T. (1964) Chemical composition of Hawaiian lavas. Jour. Petrol, v.5, pp.82-133.
14. MAJUMDAR, S.K. (1986) The Precambrian framework of part of the Khasi Hills, Meghalaya Rec. Geol. Surv. India, v. 117, pt.2, pp. 1-59.
15. ALLIKARJUNA RAO, J., POORNACHANDRA RAO, G.V.S., SURESH RAJ, T., RAJENDRA PRASAD, N.R, RAVI PRAKASH, S., SRINIVASA RAO, B. and VENKATESWARLYU, M. (2004) Petrology, geochemistry and palaeomagnetic studies of West Garo Hills dykes, Meghalaya. DST News Letter, v.14, No.2, pp.6-9.
16. MALLIKHARJUNA RAO, J. and POORNACHANDRA RAO, G.V.S. (2008) Petrological, geochemical and palaeomagnetic results of dolerite dyke swarms from the West Garo Hills, Shillong Plateau, Meghalaya. In: R.K. Srivastava, K. Sivaji and N.V. Chalapathi Rao. (Eds.), Indian Dykes - Geochemistry, Geophysics and Geochronology. Narosa Publ. House Ltd., New Delhi, pp.589-607.
17. NANDI, D.R. (2001) Geodynamics of northeastern India and the adjoining region. Acad. Publ., Kolkata, pp. 111-130.
18. NIVARANI DEVI and SARMA, K.P. (2006) Tectonostratigraphic study of conglomerates of Shillong Basin of Meghalaya. Jour. Geol. Soc. India, v.68, pp.1100-1108.
19. PEARCE, J.A. (1982) Trace element characteristic of lavas from destructive plate boundaries. In: R. S. Thrope (Ed.), Andesites, Wiley, Chichester, pp.525-548.
20. PEARCE, J.A. and NORRY, M.J. (1979) Petrogenetic implications of Ti, Zr, Y and Nb variations in volcanic rocks. Contrib. Mineral. Petrol, v.69, pp.33-47.
21. POORNACHANDRA RAO, G.V.S. and MALLIKHARJUNA RAO, J. (2006) A palaeomagnetic study of charnockites from Madras block, southern granulite terrain, India. Gondwana Res., v.10, pp.57-65.
22. RADHAKRISHNAMURTY, C. and DEUTSCH, E.R. (1974) Magnetic techniques for ascertaining the nature of iron grains in basalts. Jour. Geophys., v.40, pp.453-456.
23. RAO, M.G. (1973) Alkali lamprophyres from Garo Hills, Assam. Rec. Geol. Surv. India, v. 105, pt.2, pp. 121-125.
24. SRINIVASAN, P, SEN, S. and BANDOPADHYAY, P.C. (1996) Study of variation of Palaeocene-Eocene sediments in the shield arm of Shillong Plateau. Rec. Geol. Surv. India, v. 129, pt.4, pp.77-78.
25. 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.
26. WEAVER, B.L. and TARNEY, J. (1984) Emperical approach to estimating the composition of the continental crust. Nature, v.310, pp.575-577.
27. WHITE, N.J. and LOVELL, B. (1997) Measuring the pulse of plume with sedimentary geology. Nature, v. 387, pp. 887-891.
28. ZIJDERVELD, J.D.A. (1967) AC demagnetization of rocks: analaysis of results. In: D.W. Collinson, K.M. Creer and S.K. Runcorn (Eds.), Methods in Palaeomagnetism. Elsevier, New York, pp.254-286.