Full Name
Yellappa Thoti

Principal Scientist

R&D Group



  Academic Identity

Dr. Yellappa, Thoti received his M.Sc degree in the year 2000 from Sri Venkateswara University, Tirupati, Andhra Pradesh, and Ph.D. degree in the year 2013 from Osmania University, Hyderabad. He was awarded CSIR Junior Research Fellowship in 2002 and worked as CSIR-JRF at National Geophysical Research Institute, Hyderabad for one and a half years. Later he moved to the Atomic Minerals Directorate, Department of Atomic Energy, Government of India as a Scientific Officer ‘C’. There, he worked for two years in the field of Uranium exploration in Bastar craton, Central India by using Radiometric survey, Radon aminometry, Geological mapping and drilling methods. In the year 2006 June, he came back to his previous institute (NGRI) with a strong research interest as a Scientist. Presently he is working on the Tectonics evolution of Precambrian Cratons and high-grade terranes (SGT) by using structural mapping, geochemistry and geochronology. He published several articles in national and international journals. He reported for the first time a Neoarchean (~2500 Ma old)and Neoproterozoic (~800 Ma old) supra-subduction zone type ophiolites/oceanic remnants from the Cauvery Suture Zone, Southern Granulite Terrain, India.

Tectonothermal evolution of Southern granulite terrane.

Geodynamics of Singhbum Craton

1. Fellow Geological Society of London

2. Fellow Geological Society of India

3. Associate Fellow Telangana/Andhra Pradesh Academy of Sciences 

4. CSIR-JRF and Lectureship

  1. Yellappa, T., 2022. Thenmudiyanur Mafic-Ultramafic Complex from the northeastern margin of Southern Granulite Terrane, India: An example for Alaskan- type of evolution. J. Earth Sys. Sci., 131(206), 1-27.
  2. Yellappa, T., Santosh, and Manju, S. 2019. The mafic-ultramafic complex of Salem, southern India: An analog for Neoproterozoic Alaskan- type complex. Geol. Journ. 54(5),3017–3040.
  3. Yellappa, T. and Mallikarjuna Rao, M., 2018. Geochemical constrains on Neoproterozoic Granitoids from Cauvery Suture Zone, Southern granulite Terrain: implications for Gondwana. J. Earth Sys. Sci., 127:22.
  4. Yellappa, T., Chetty, T.R.K, and Santosh, M., 2016. Precambrian iron formations from the Cauvery Suture Zone, Southern India: Implications for sub-marine hydrothermal origin in Neoarchean and Neoproterozoic convergent margin settings. Ore Geol. Rev. 72,1177-1196.
  5. Yellappa, T., Venkatasivappa, V., Koizumi, T., Chetty, T.R.K., Santosh, M., Tsunogae, T., 2014. The mafic-ultramafic complex of Aniyapuram, Cauvery Suture Zone, Southern India: Petrological and geochemical constraints for Neoarchean suprasubduction zone tectonics. J. Asian Earth Sci. 95, 81-98.
  6. Yellappa, T., Santosh, M., Chetty, T.R.K. Sanghoon Kwon, Chansoo Park, Nagesh, P., Mohanty D.P, Venkatasivappa, V., 2012. A Neoarchean dismembered ophiolite complex from southern India: Geochemical and geochronological constraints on its suprasubduction origin. Gondwana Res. 21, 245-265.
  7. Yellappa, T., Chetty, T.R.K, and Santosh, M., 2012. Regional tectonic framework of southern Bastar Craton, Central India: a study based on different spatial information data sets. Geol. Journ. 47,161-185.
  8. Santosh, M., Xiao, W.J., Tsunogae, T., Chetty, T.R.K., Yellappa, T., 2012. The Neoproterozoic subduction complex in southern India: SIMS zircon U-Pb ages and implications for Gondwana assembly. Precamb. Res. 192-195,190-208.
  9. Yellappa, T., Chalapathi Rao, N.V., and Chetty, T.R.K., 2010. Occurrence of lamproite dykes at the Northern margin of the Indravati basin, Bastar craton, Central India, J. Geol. Soc. India, 75,632-643.
  10. Yellappa, T., Chetty, T.R.K, Tsunogae. T and Santosh, M. 2010. Manamedu complex: Geochemical constraints on Neoproterozoic suprasubduction zone ophiolite formation within Gondwana suture in southern India. J. Geodyn. 50, 268-285.

June 2006 - Till today:  Scientist, CSIR-NGRI, Hyderabad

May 2004 - May 2006:  Scientific Officer C, Atomic Minerals Directorate, Dept. of Atomic Energy, Govt. of India