IITKGP

Dewashish Upadhyay

Professor

Geology and Geophysics

+91-3222-283398

dewashish@gg.iitkgp.ac.in

Research Areas

  • Geochemistry
  • Isotope Geology
  • Geochronology
  • Petrology
  • Cosmochemistry
My research interests are focused in the fields of geochemistry, isotope geology, geochronology and petrology. I have established a state-of-the-art radiogenic isotope facility that houses a Multi Collector Inductively Coupled Plasma Mass Spectrometer (MC-ICPMS: Neptune Plus from Thermo Fisher Scientific), a quadrupole ICPMS (iCap-Q, Thermo Fisher Scientific) and a 193 nm Excimer Laser Ablation system (New Wave Research) and a clean chemistry laboratory. Some of the major themes on which I work include:
(1) In-situ U-Pb geochronology of accessory minerals (zircon, rutile, monazite etc.) using LA-ICPMS
(2) In-situ Hf isotope measurements in zircon, B isotopes in tourmaline, Li isotopes in tourmaline/micas/pyroxene/amphibole using LA-MC-ICPMS
(3) In–situ measurements of trace elements in mineral fluid inclusions
(4) The Hadean/Archean crustal evolution of the Indian shield
(5) Proterozoic crustal accretion and growth of the Indian Shield
(6) Rare Earth Element mineralization in carbonatite and peralkaline granitoids
(7)Textures, microstructures and geochemistry of rocks from bolide impact craters
(8) Replacement reaction mechanisms and mass transfer processes in minerals
(9) Cr-isotopes in Archean Banded Iron Formation and the oxygenation of the Archean atmosphere
We are the first in the country to carry out in-situ U-Pb dating of zircon, rutile, and baddeleyite, Hf isotope measurements in zircon, Boron and Li isotope measurements in tourmaline, clinopyroxene and micas.


 
  • Detrital zircon evidence for change in geodynamic regime of continental crust formation 3.7 3.6 billion years ago Ranjan S., Upadhyay D., Pruseth K.L., Nanda J.K. By Earth and Planetary Science Letters 538 - (2020)
  • Magmatic and Metamorphic History of Paleoarchean TonaliteTrondhjemiteGranodiorite (TTG) Suite from the Singhbhum Craton, Eastern India Upadhyay, D., Chattopadhyay, S., Kooijman, E., Mezger, K., Berndt, J. By Precambrian Research 252 180-190 (2014)
  • Paleoarchean and Neoarchean Tonalite Trondhjemite Granodiorite (TTG) and granite magmatism in the Western Dharwar Craton, southern India: Implications for Archean continental growth and geodynamics Ranjan S., Upadhyay D., Abhinay K., Srikantappa C. By Precambrian Research 340 - (2020)
  • Formation of Paleoarchean-Mesoarchean Na-rich (TTG) and K-rich granitoid crust of the Singhbhum craton, eastern India: Constraints from major and trace element geochemistry and Sr-Nd-Hf isotope composition Upadhyay D., Chattopadhyay S., Mezger K. By Precambrian Research 327 255-272 (2019)
  • Shock Metamorphic Features in the Archean Simlipal Complex, Singhbhum Craton, Eastern India: Possible Remnant of a Large Impact Structure Singh A.K., Upadhyay D., Pruseth K.L., Mezger K., Nanda J.K., Maiti S., Saha D. By Journal of the Geological Society of India 97 35-47 (2021)
  • The geochemical differentiation of S-type pegmatites: constraints from major trace element and Li B isotopic composition of muscovite and tourmaline Chakraborty T., Upadhyay D. By Contributions to Mineralogy and Petrology 175 - (2020)
  • The geological evolution of the Gangpur Schist Belt, eastern India: Constraints on the formation of the Greater Indian Landmass in the Proterozoic Chakraborty T., Upadhyay D., Ranjan S., Pruseth K.L., Nanda J.K. By Journal of Metamorphic Geology 37 113-151 (2019)
  • Origin of Rapakivi feldspar by a fluid induced coupled dissolution reprecipitation process Mondal S., Upadhyay D. , Banerjee A. By Journal of Petrology 58 1393-1418 (2017)

Co-Principal Investigator

  • Source of the ore fluid and timing of gold mineralization in the Dharwar Craton: constraints from U-Pb/Sm-Nd geochronology and Sr-B-Li-Hf isotopes (ZBSA) Ministry of Earth Sciences

Ph. D. Students

Debojyoti Pati

Area of Research: Geochemistry

Kumar Abhinay

Area of Research: Geochemistry and petrology

Priyabrata Mohanty

Area of Research: Petrology and Geochemistry

Rupashree Saha

Area of Research: Isotope Geology

Shailendra Yadav

Area of Research: Geochemistry and Petrology

Suratha Kumar Panda

Area of Research: Geochemistry

Tapasya Singh

Area of Research: Petrology and Geochemistry

Teresa Akhila Jude

Area of Research: Igneous Petrology & Geochemistry

Vikash Kumar

Area of Research: Petrology and isotope geochemistry