Indian Institute of Technology Kharagpur |

Significant contributions to understand the mantle deformation patterns of the Indian Plate using seismic anisotropy studies. Successfully demonstrated the anisotropic nature of the Indian plate and its linkage to the geodynamics of the Himalayan-Tibetan Mountain System. Evidence for attrition and preservation of lithospheric roots supports a highly heterogeneous nature of the Indian lithospheric mantle. Imaging the Indian subcontinent with creation of high resolution body-wave tomography models a significant advancement in our understanding of the geodynamics of the Indian continental lithospheric-mantle.

High resolution imaging of the crust-mantle structure and deciphering the deformation patterns hold the key to elucidate the evolution of the diverse geological provinces that constitute the Earth's surface. I made contributions in this direction by obtaining the first significant results of shear wave anisotropy underneath the Indian tectonic plate and demonstrating that the shield and actively deforming regions are strongly anisotropic in character, contrary to previous understanding. Seismic tomography in the study area has a limited resolution due to paucity of seismic stations over the Indiancontinent. Seismic imaging of the Indian sub-continent using body wave tomography not only provides evidence of presence of lithospheric roots beneath the Indian shield but is an important contribution to the debate of thick or thin Indian lithosphere. Further refinements were made to incorporate the anisotropic corrections in the isotropic tomographic models. It was essential to account for any bias introduced in the final tomographic velocity models due to anisotropic effects. Present research is focussed on understanding the crust and upper mantle structure of different tectonics domains of the Indian sub-continent using state-of-the-art techniques like receiver functions.

All Publications

Tomographic Imaging of the Plate Geometry Beneath the Arunachal Himalaya and Burmese Subduction Zones Dubey A.K., Singh A., Kumar M.R., Jana N., Sarkar S., Saikia D., Singh C. By Geophysical Research Letters 49 - (2022)
P wave velocity structure below India and Tibet incorporating anisotropic delay time effects Mohanty, D. D., Singh A., ODriscoll , L., Kumar, M. R., Srinagesh, D., Humphreys E. By Geochemistry, Geophysics, Geosystems doi/10.1002/2015GC006064 - (2016)
Seismic Imaging of the Crust Beneath Arunachal Himalaya Singh A., Saikia D., Kumar M.R. By Journal of Geophysical Research: Solid Earth 126 - (2021)
Seismic imaging of the deep crustal structure beneath Eastern Ghats Mobile Belt (India): Crustal growth in the context of assembly of Rodinia and Gondwana supercontinents Singh A., Singh C. By Precambrian Research 331 - (2019)
Discerning Structure and Seismic Hazards in the Sikkim Himalayas Uthaman M., Singh A. , Singh C. , Dubey A. K., Kumar G. By Science News 102 - (2021)
Spatial and temporal variation of the ambient noise environment of the Sikkim Himalaya Uthaman M., Singh C., Singh A., Jana N., Dubey A.K., Sarkar S., Tiwari A.K. By Scientific Reports 12 - (2022)
A review of crust and upper mantle structure beneath the Indian subcontinent Singh, A., Singh, C., and Kennett, B. L. N. By Tectonophysics 644-645 1-21 (2015)
Crustal Structure Beneath India and Tibet: New Constraints From Inversion of Receiver Functions Singh A., Kumar M. R., Mohanty D. D., Singh C. , Biswas R. , Srinagesh D. By Journal of Geophysical Research: Solid Earth 122 7839-7859 (2017)
Crustal structure and tectonics of Bangladesh: New constraints from inversion of receiver functions Singh, A., Bhushan, K., Singh, C., Steckler, M. S., Akhter, S. H., Seeber, L., Kim, W. Y., Tiwari, A., K., and Biswas, B. By Tectonophysics 680 99-112 (2016)
Continental scale body wave tomography of India: Evidence for attrition and preservation of lithospheric roots Singh, A., Mercier, J.P., Kumar, M. R., Srinagesh, D., and Chadha, R. K. By Geochemistry, Geophysics, Geosystems 15 658-675 (2014)

Completed Projects

Co-Principal Investigator

Mechanism of intra-plate seismicity in Chhattisgarh Basin: Possibility of Anthropogenic causes (ZBSA) Ministry of Earth Sciences

Alumni members