Scientist , Geochemistry
Structural Geology and Tectonics
Dr. Arun Kumar Ojha received both M.Sc. and Ph.D. degrees from the Indian Institute of Technology, Roorkee. Dr. Ojha, extensively involved in Himalayan shear zones to understand the evolutionary history using a multi-proxy approach that includes structural geology, fluid inclusion microthermometry, geochronology, and numerical simulations during his Ph.D. After the submission of his Ph.D. in 2019, Dr. Ojha joined the Research School of Earth Sciences, Australian National University with Prof. Gordon Lister in a ‘Slab Modelling’ project to model the subducting Pacific slab. The aim of the slab modelling work was to understand the slab geometry and its role in upper plate tectonics and deformation. Dr. Ojha joined NGRI in April 2021 as a scientist.
1. SERB-StartUp grant (Dec. 2022 to Dec. 2024)- Revisiting the Himachal Himalaya to test different tectonic models and their implications to Himalayan geodynamics (27.4 Lakhs).
1. Ojha, A. K.* Srivastava, D. C., Forster, M., Lister, G. (2024). Evidence of back-folding in the Beas Valley puts Himalayan tectonic models on trial. Journal of Structural Geology. 186. Doi: 10.1016/j.jsg.2024.105217.
2. Behera, S. S., Tiwari, S., Pandey, A. K., Agarwal, A.*, Ojha, A. K. (2024). Direction of impact at Dhala impact structure, India deciphered from microfracture intensity and X-ray diffraction: A new potential impact direction indicator. Earth, Planets and Space. 76 (83). Doi: 10.1186/s40623-024-02028-1.
3. Jamir, I., Kumar, V., Ojha, A. K., Gupta, V., Martha, T. P., Griffiths, D. V.* (2024). Evaluating failure regime of an active landslide using instability and rockfall simulation, NW Himalaya. Environmental Earth Sciences. 83:256, 19. Doi: 10.1007/s12665-024-11540-2.
4. Ojha, A. K.*, Monika Saini, D. P., Agarwal, A., Pandey, A. K. (2024). Tectonic development in Singhbhum Craton, NE India decrypted from dyke swarms: A window to understand magma dynamics in Archean-Proterozoic supercontinents. Physics of Earth and Planetary Interiors. 350, 107169. Doi: 10.1016/j.pepi.2024.107169.
5. Joshi, G.*, Agarwal, A., Kenkmann, T., Ojha, A. K. (2024). Kink-bands as indicators of shock-wave propagation direction: results from experimental impact cratering on gneiss. Journal of Structural Geology. Doi: 10.1016/j.jsg.2024.105082.
6. Joshi, G., Phukon, P., Agarwal, A., Ojha, A.K., (2023). On the emplacement of the impact melt at the Dhala impact structure, India. Journal of Geophysical Research Planets, 128(7), 1-14. doi: 10.1029/2023JE007840.
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Ph.D. (IIT Roorkee), M.Sc. (IIT Roorkee)