Tomson

Dr. Tomson J Kallukalam Ph.D.

Scientist D, Crustal Processes (CrP)

Email : This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

Phone(Off) : 0471-2511621

Phone(Res) :

Fax : 0471-2442280

  1. Zircon U-Pb ages and Hf isotopic systematics of charnockite gneisses from the Ediacaran–Cambrian high-grade metamorphic terranes, southern India:Constraints on crust formation, recycling, and Gondwana correlations.” T. Vijaya Kumar, Y.J. Bhaskar Rao, Diana Plavsa, Alan Collins, J.K. Tomson, B. Vijaya Gopal, EVSSK Babu (2017) GSA Bulletin; May/June 2017; v. 129; no. 5/6; p. 625–648;
  2. “Geochemistry and Neodymium model ages of Precambrian charnockites, Southern Granulite Terrain, south India: constraints on terrain assembly.” J.K. Tomson, Y.J. Bhaskar Rao, T. Vijaya Kumar, and A. K. Choudhary (2013), Precambrian Research, 227, pp-295-315.
  3. “The LAM-MC-ICPMS National Facility at the National Geophysical Research Institute (NGRI), Council of Scientific and Industrial Research, Hyderabad.” Y.J. Bhaskar Rao, B.Vijaya Gopal, EVSSK Babu, N.P.Sukumaran, T.Vijaya Kumar, J.K.Tomson, KVSS Krishna DST News Letter, August 2009, pp.11-13.
  4. J.K. Tomson, Y.J. Bhaskar Rao, T. Vijaya Kumar and J. Mallikharjuna Rao (2006), Charnockite genesis across the Archaean – Proterozoic Terrane boundary in the South Indian Granulite Terrain: constraints from major-trace element geochemistry and Sr-Nd isotopic systematics, Gondwana Research, 10, pp-115-127.
  5. Y.J. Bhaskar Rao, T. Vijaya Kumar, K.V.S.S.Krishna, J.K.Tomson (2008),The emerging pattern of crust-formation and recycling history in the Precambrian Dharwar Craton and the Southern Granulite Terrain, southern India: Constraints from recent geochronological and isotopic results. Geol.Soc.India, 74, 147-168.
  6. J.K. Tomson, Y.J. Bhaskar Rao, T. Vijaya Kumar, A.K. Choudhary (2009) Widespread intracrustal melting and the generation of charnockites in the Neoproterozoic Maduarai Block, South India., Geochimica et Cosmochimica Acta, 73, A1339.
  7. T. Vijayakumar, Y.J.Bhaskar Rao, J.K. Tomson, A.K. Choudhary (2009), Role of deep crustal contamination in the genesis of Perinthatta anorthosite massif, South India. Geochimica et Cosmochimica Acta, 73, A1383.
  8. J.K. Tomson, Y.J. Bhaskar Rao, T. Vijaya Kumar, A.K. Choudhary (2008)  Geochemistry and Sr-Nd isotopic systematics of Archaean and Neoproterozoic charnockites from the Southern Granulite Terrain, South India: Magma genesis and tectonics.  Geochimica et Cosmochimica Acta, 72, 2S-A951
  9. Vijayakumar, Y.J.Bhaskar Rao, J.K. Tomson, A.K. Choudhary (2008), A Mesoproterozoic Sm-Nd age for the Oddanchatram anorthosite massif, South India: Evidence for ancient crustal contamination and significance to the regional terrane assembly. Geochimica et Cosmochimica Acta, 72, 2S- A984.

List of papers presented in conferences:

  1. “Zircon U-Pb ages and Hf-isotopic compositions of Late Archean charnockites from the Biligiri Rangan, Nilgiri, Vythiri, and Coorg granulite massifs, the Southern Granulite Terrain, S. India: constraints on terrane assembly and charnockite precursors.”T. Vijaya Kumar, Y.J. Bhaskar Rao, Chris Clark, Richard Taylor, J.K. Tomson, B. Sreenivas, E.V.S.S.K. Babu and B. Vijaya Gopal (2013) in Granulites & Granulites Conference, Hyderabad.
  2. “NGRI LAM-MC-ICPMS National Facility: Reproducibility of Sr, Nd and Hf isotopic measurements.” Y.J. Bhaskar Rao, B.Vijaya Gopal, EVSSK Babu, N.P.Sukumaran, T.Vijaya Kumar, KVSS Krishna, J.K.Tomson (2009), In Proceedings of 11th ISMAS-TRICON-2009, Hyderabad, pp.52-57.
  3. “Sr, Nd, Hf and Pb isotopic characterization of the USGS BCR-2 Standard: Results from the NGRI MC-ICPMS Facility.” N.P.Sukumaran, T.Vijaya Kumar, J.K.Tomson, KVSS Krishna, B.Vijaya Gopal, Y.J. Bhaskar Rao, EVSSK Babu (2009), In Proceedings of 11th ISMAS-TRICON- 2009, Hyderabad, pp.518-521.
  4. “Sm-Nd and Rb-Sr ages and isotopic constraints on Precambrian terrain assembly aroundCauvery shear zone system, Southern Granulite Terrain, South India.” Y.J.Bhaskar Rao, T. Vijayakumar, J.K. Tomson, A.M.Dayal (2004), In Proceedings of the International Workshop on Tectonics and Evolution of the Precambrian Southern Granulite Terrain, India and Gondwanian correlations, Feb.18-25, NGRI, Hyderabad.