Dr. Ravi Ranjan Kumar

Designation: Assistant Professor

Department: Geology

Joined NEHU on



Degree Institution/University Subject Year Division/CGPA
Ph.D. Indian Institute of Technology (Banaras Hindu University), Varanasi Geology 2021 8.50/10
M.Sc. (Tech) Institute of Science, Banaras Hindu University, Varanasi Geology 2016 8.61/10
B.Sc. (Hons) Institute of Science, Banaras Hindu University, Varanasi Geology 2013 7.98/10
10+2 Central Hindu Boy’s School (Banaras Hindu University), Varanasi PCB 2009 First
Matriculation S.S. High School, Sasaram, Rohtas, Bihar   2007 First


Research Experience: 7 years

Post-Doctoral Research Experience: In the Ministry of Earth Science (MoES), Government of Indian, sponsored project entitled “Tracing the Precambrian magmatic component in the geodynamic evolution of Kumaun Himalaya and their geological correlation: Constraints from phase petrology, geochemistry, U-Pb SHRIMP zircon geochronology and Lu-Hf-O isotopes of granites and their enclaves”
Supervisor: Prof. Santosh Kumar
Department of Geology, Kumaun University, Nainital (Uttarakhand)

PhD Thesis: “Petrological, Geochronological and Tectono-metamorphic evolution of granulite facies rocks from the Daltonganj (Palamau) Jharkhand, India”
Specialization: Petrology
Supervisor: Prof. Shyam Bihari Dwivedi
Indian Institute of Technology (BHU), Varanasi

M.Sc. Dissertation: “Petrography and Genesis of Zawar (Mochia) Lead-Zinc ore deposit, Udaipur district, Rajasthan”
Supervisor – Prof. Satyendra Singh
Department of Geology, Institute of Science, Banaras Hindu University, Varanasi, UP

Igneous and Metamorphic Petrology, Geochemistry and Geochronology, Mineralogy and Crystallography, Engineering Geology, Geodynamics, Exploration Geology, etc.


  • Geodynamic processes and Tectono-metamorphic evolution of Gneissic and Granulitic Complex of CITZ such as Chhotanagpur Granite Gneissic Complex, Shillong Meghalaya Gneissic Complex,  Makrohar Granulite Belt, Betul Supracrustal Belt, Sausar Mobile Belt
  • Petrochemistry and geodynamic evolution of the Mylliem Granitoid along with the associated Migmatitic-Gneisses from the Meghalaya Plateau, North-East India
  • Constraints for growth and differentiation of the Archean and Proterozoic continental crusts [Bundelkhand Craton (BC) and Central India Tectonic Zone (CITZ)]
  • Petrographical investigation and Textural relationships of amphibolite to granulite facies rocks
  • Mineral chemistry (EPMA analysis), TEM analysis, SEM analysis, and Oxygen Fugacity
  • In-situ U-Thtotal-Pb Monazite chemical dating and U-Pb zircon dating
  • Phase relationship, Geothermometry and Geobarometry, Phase equilbria modelling (P-T, P-X, T-X), Pressure-temperature-time (P-T-t) trajectory path
  • Geochemical analysis (Major elements, Trace elements and Rare earth elements) and Petrogenesis of granulite grade metamorphic rocks
  • Geodynamic correlation and Super-continental assembly such as, Kenorlad, Columbia, Rodinia, Gondwana


  • Senior Research Fellow (UGC-JRF, New Delhi) (July 2018- to July 2021): Department of Civil Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, India.
  • Junior Research Fellow (UGC-JRF, New Delhi) (July 2016- July 2018): Department of Civil Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, India.
  • GATE (IISc Bangalore)- 2016


  • Prof. Kaushik Das, Department of Earth and Planetary Systems Science, Hiroshima University, Japan
  • Dr. Kenta Kawaguchi, Department of Earth and Environmental Sciences, Jeonbuk National University, Republic of Korea


  • Software Skills
  • Instrumental Skills
    LIECA Petrological Microscope, Reflected Microscope, Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), UV-Vis emission spectrophotometers, PH- photometer, Flame photometer, Slake Durability test, Schlumberger resistivity logging, Guelph Permeability test, Schmidt hammer test, Separation of heavy mineral (Zircon).

Membership/Fellowship of Academies/Institutions/Professional Societies

  • Member of the Editorial Board of Earth Science (EARTH); Science Publishing Group.   ISSN Print: 2328-5974; ISSN Online: 2328-5982
  • Member of the Scientific Committee of the 3rd Conference of the Arabian Journal of Geosciences (CAJG), held online, on 2–5 November 2020.
  • Reviewer of Journals –
    • Mineralogy and Petrology (ISSN: 1438-1168/ 0930-0708)
    • International Journal of Earth Sciences (ISSN: 1437-3262/ 1437-3254)                      
    • Journal of Archaeology & Anthropology (ISSN: 2687-8402)
    • Arabian Journal of Geosciences (ISSN: 1866-7538 / 1866-7511)
    • Earth Sciences Research Journal (ISSN: 1794-6190 / 2339-3459)         
  • Member of American Association of Petroleum Geologists (Student Chapter- BHU)
  • University Grant Commission (Junior Research Fellow) – 2016 to 2018
  • University Grant Commission (Senior Research Fellow) – 2018 to 2021
  • Graduate Aptitude Test in Engineering (GATE), India – 2016
  • Teaching Assistant, Engineering Geosciences Division, Indian Institute of Technology (BHU), Varanasi – 2017 to 2021
  • Successful Geologists and Geoscientists Written Examination conducted by the UPSC, New Delhi, India 2016
  • Qualified- CSIR-UGC NET JRF, 2014



  • Dwivedi, S.B., Pathak, P., Theunuo, K. and Kumar, R.R.: U–Pb SHRIMP zircon dating and Geochemistry of metapelites from the Shillong Meghalaya Gneissic Complex, NE India: Implications for nature of protolith and tectonic setting. Geosystems and Geoenvironment. 100161.  (2023). https://doi.org/10.1016/j.geogeo.2022.100161  
  • Kumar, R.R., Kawaguchi, K., Dwivedi, S.B. and Das, K.: Metamorphic evolution of the pelitic and mafic granulites from Daltonganj, Chhotanagpur Granite Gneiss Complex: constraints from zircon U-Pb age and phase equilibria modeling. Geological Journal. 57 (3), 1284-1310 (2022). https://doi.org/10.1002/gj.4340 (I.F - 2.468)
  • Kumar, R.R. Dwivedi, S.B. and Pathak, P.: Phase equilibria modeling and Geochemistry of high-grade gneiss from Daltonganj of the Chhotanagpur Granite Gneiss Complex, Eastern India: Implications in Tectono-metamorphic evolution. Geosystems and Geoenvironment. 4(1): 100082 (2022). https://doi.org/10.1016/j.geogeo.2022.100082
  • Kumar, R.R. and Dwivedi, S.B.: Exsolution intergrowth of Cpx-Opx and Pseudosection modeling of two-pyroxene basic granulite from Daltonganj of Chhotanagpur granite-gneiss complex, Eastern India. Arabian Journal of Geosciences. 14; 767 (2021). https://doi.org/10.1007/s12517-021-07093-4  (I.F - 1.985)
  • Kumar, R.R. and Dwivedi, S.B.: EPMA Monazite geochronology of the granulites from Daltonganj, Eastern India and its correlation with Rodinia Supercontinent. Journal of Earth System Sciences.  128; 234 (2019). https://doi.org/10.1007/s12040-019-1254-y  (I.F - 1.83)
  • Dwivedi, S.B., Kumar, R.R. and Srivastava, M.: Multistage gedrite in gedrite–hypersthene-bearing high-grade granulites from Daltonganj, Chhotanagpur granite–gneissic complex, Jharkhand, as evident from TEM and textural relations. Journal of Earth System Sciences.  128; 41 (2019). https://doi.org/10.1007/s12040-018-1065-6  (I.F - 1.83)
  • Dwivedi, S.B., Theunuo, K. and Kumar, R.R.: Characterization and metamorphic evolution of Mesoproterozoic granulites from Sonapahar (Meghalaya), NE-India, using EPMA monazite dating. Geological Magazine. 1: 1-19 (2020). https://doi.org/10.1017/S0016756819001389. (I.F - 2.49)
  • Pathak, P., Dwivedi, S.B. and Kumar, R.R.: Metamorphic petrology of the Amphibolites from Central Bundelkhand Greenstone Belt, central India: P-T constraints and phase equilibria modeling. Journal of Environment & Earth Sciences. 4(1): 15-31 (2022). https://doi.org/10.30564/jees.v4i1.4397
  • Pathak, P., Dwivedi, S.B. and Kumar, R.R.: Geochemistry and Phase equilibrium modelling of garnet-biotite gneiss from Mauranipur, Bundelkhand Gneissic Complex, Northern India; implication for tectonic setting and metamorphism. Journal of Geosciences Research. 7(2): 186-192 (2022). https://doi.org/10.56153/g19088-021-0048-2
  • Pathak, P., Dwivedi, S.B. and Kumar, R.R.: Phase equilibria modelling and textural relationship of garnet-orthopyroxene gneiss from Mauranipur of the Bundelkhand Gneissic Complex, central India. Arabian Journal of Geosciences. 15(21):1642 (2022). https://doi.org/10.1007/s12517-022-10944-3


  • Kumar Ravi Ranjan, Kumar Santosh, Pundir Shailendra, Panwar Kapil S. (2023) Origin of Fe-Ti oxides in the granites from the Muglib and Pangong of the Shyok Suture Zone of Trans-Himalaya, India: Insights from textural and in-situ chemistry of manganoan-Ilmenite and re-equilibrated biotite. National Conference on “Geodynamics in Himalaya & Disaster Management’. (Central University of Himachal Pradesh)
  • Kumar Ravi Ranjan and Dwivedi S B (2020). Petrology and Phase equilibrium modelling (NCKFMASHTO system) of basic granulites; From Daltonganj of Chhotanagpur granite gneiss complex, Eastern India. International Conference On “Recent Developments in Earth & Environmental Sciences, Natural Resource Management and Climate Change with special focus on Eastern Himalayas”. (University of Sikkim, India)
  • Kumar Ravi Ranjan, and Dwivedi S B (2019). Electron Microprobe Dating of monazite from granulite gneisses of the NW Chhotanagpur-granite-gneissic complex, Eastern India. National conference on “Recent trends in Earth Science Research” (BHU)
  • Kumar Ravi Ranjan and Dwivedi S B (2019). U-Th-Pb chemical dating of Monazite from Daltonganj of CGGC, Eastern India and geodynamic implications. Role of Remote Sensing and GIS in Natural Hazard Assessment for Sustainable Development: Present Scenario and Future Perspective (University of Lucknow, India)
  • Kumar Ravi Ranjan, Dwivedi S B and Srivastava M (2018). Occurrences of three stages of gedrite in granulitic gneiss from NW of Chhotanagpur-granite-gneissic complex, India: TEM perspective. National conference on advances in mantle petrology (BHU), 23-24


  • Advanced Training Programme on “Granite and Related Rocks”, sponsored by KIRAN- Department of Science and Technology, Government of India. (2022)
  • Certificate Course on “Green Campus, Energy and Environment Management Audits” Organized by Nature Science Foundation, at Coimbatore, Tamilnadu, India. (2022)
  • Technical Report of the “U-Thtotal-Pb chemical dating, Phase equilibria modeling and geochemistry of high-grade gneiss from Daltonganj, Chhotanagpur-granite-gneissic complex, Eastern India”. Organized by Metamorphic Studies Group on 40th anniversary Research in Progress meeting (Mineralogical Society of UK and Ireland). (2021)
  • Participate in e-Training on “Phase Equilibria Modelling in Petrology – Practical approach using Perple_X”, Conducted by RTD, ER, GSITI, Kolkata. (2021)
  • Participate in Workshop program on “LaTex for Beginners”, Organized by IEEE IAS student chapter & IEEE student chapter. (IIT, BHU) ( 2018)
  • Participate in National Conference on “Emerging Scenarios of the Ganga, River Development & Water Resource Management”, Organized by Mahamana Malviya Researcg Centre for Ganga, River Development & Water Resource Management, and IESD, BHU. (2017)
  • Participate in “Author Workshop” jointly organized by Springer Nature, BHU, & IIT BHU. (2016)