Skip to main content


We’d like to understand how you use our websites in order to improve them. Register your interest.

Aeromagnetic data analysis for the identification of concealed uranium deposits: a case history from Singhbhum uranium province, India


Aeromagnetic data over a part of the Singhbhum uranium province, India, within the framework of ‘Operation Hard Rock’ have been analyzed. The aeromagnetic anomaly map, its analytic signal amplitude, the Euler solutions and apparent susceptibility map helped in identifying the nature and depth of the magnetic sources in the study region. The Singhbhum Shear Zone is clearly delineated. The location of the mined uranium deposits coincide with the shallow magnetic sources. The present study also identified distinctive magnetic sources between the Dalma Volcanics and the Chotanagpur Granitic Gneissic Complex that suggest the presence of a sub-surface shear. The magnetic sources in this newly identified shear zone lie at a depth of 200 m and depict a similar magnetic signature and susceptibility as those of the Singhbhum Shear Zone where uranium is being mined. This shear could be the subsurface contact between high-grade metamorphic rocks (amphibolite facies) to the north and the greenschist facies low-grade metamorphics to the south. This shear zone, also characterized by radiometric anomalies, possibly indicates a zone of concealed uranium deposit that can be explored in the future. The present analysis shows the importance of aeromagnetic surveys and its utility in exploration for concealed mineral deposits.


  1. Anand S. P. and Mita Rajaram, Identification of Uranium deposits through analysis of aeromagnetic data over Singhbhum, Exploration and research for Atomic Minerals, (a publication of the Atomic Minerals Directorate for exploration and research, India) 15, 121–126, 2004 (Papers presented in the workshop on “Geophysical Techniques for Exploration of concealed uranium deposits”, held at AMD, Hyderabad).

  2. Barnes, H. L., S. S. Adams, and A. W. Rose, Ores formed by diagenetic and metamorphic processes. Mineral Resources: Genetic Understanding for practical applications, in Studies in Geophysics, National Academy Press, Washington D.C., 1981.

  3. Clark, D. A., Magnetic petrophysics and magnetic petrology: aids to geological interpretation of magnetic surveys, AGSO J. Aust. Geol. Geophys., 17(2), 83–103, 1997.

  4. David, W. M., G. M. Gibson, and J. W. Giddings, Regional structure and distribution of magnetite: implications for the interpretation of aeromagnetic data in the Broken Hill region, New South Wales, Explor. Geophys., 31, 8–16, 2000.

  5. Grant, F. S., Magnetic susceptibility mapping: The first years experience: Abstract presented at 43rd Annual International Meeting, Society of Exploration Geophysics, Mexico City, 1973.

  6. Grant, F. S., Magnetic susceptibility map with accompanying notes: Open file report, 229(A), Geological Survey of Canada, 1974.

  7. Gupta, R., UCIL—Towards sustainable supply of fuel for Nuclear power, Int. J. Nucl. Power, 18, 58–60, 2004.

  8. IAGA Division 1 Working Group 1, International Geomagnetic Reference Fields: DGRF 1965, DGRF 1970, DGRF 1975, and IGRF 1980, EOS Trans. AGU, 62, 1169, 1981.

  9. Johnson, A., S. Cheeseman, and J. Ferris, Improved compilation of Antarctic Peninsula magnetic data by new interactive grid suturing and blending methods, Ann. Geophys., 42, 249–259, 1999.

  10. Li, X., Understanding 3D analytic signal amplitude, Geophysics, 71, L13–L16, 2006.

  11. MacLeod, I. N., K. Jones, and T. T. Dai, 3D Analytic signal in the interpretation of total magnetic field data at low magnetic latitudes, Explor. Geophys., 24, 679–687, 1993.

  12. Mahadevan, T. M., Recognition of Uranium Provinces, Proc. Tech. Committee Meeting, International Atomic Energy Agency Vienna, 337–369, 1988.

  13. Mahadevan, T. M., Geology of Bihar and Jaharkhand, Text Book Series, Geological Society of India, Bangalore, 2002.

  14. McMillan, R. H., Unconformity associated U, in Geological Field Work 1997, British Columbia Ministry of Employment and Investment, 1998-1,24,G1-G4, 1997.

  15. Pandey, P., P. Kumar, and L. D. Upadhyay, Uranium Deposits of Turamdih-Nandup area, Singhbhum District, Bihar and their Spatial relationship, Abstract. Explor. Res. Atomic Minerals, 7, 1994.

  16. Reid, A. B., J. M. Allsop, H. Granser, A. J. Millett, and W. I. Somerton, Magnetic interpretations in three dimensions using Euler deconvolution, Geophysics, 55, 80–91, 1990.

  17. Roest, W. E., J. Verhoef, and M. Pilkington, Magnetic interpretation using 3D analytic signal, Geophysics, 57, 116–125, 1992.

  18. Saha, A. K., Crustal Evolution of Singhbhum North Orissa Eastern India, Mem. Geolog. Soc. India, 27, 1994.

  19. Silva, J. B. C. and G. W. Hohmann, Airborne magnetic susceptibility mapping, Explor. Geophys., 15, 1–13, 1984.

  20. Yunsheng, S., D. W. Strangway, and W. E. S. Urquhart, Geological interpretation of a high-resolution aeromagnetic survey in the Amos-Barraute area of Quebec, in The Utility of regional gravity and magnetic anomaly maps, edited by W. J. Hinze, Society of Exploration Geophysicist, pp. 413–438, 1985.

Download references

Author information



Corresponding author

Correspondence to S. P. Anand.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Anand, S.P., Rajaram, M. Aeromagnetic data analysis for the identification of concealed uranium deposits: a case history from Singhbhum uranium province, India. Earth Planet Sp 58, 1099–1103 (2006).

Download citation

Key words

  • Magnetic anomalies
  • tectonics
  • magnetite
  • potential field
  • analytic signal
  • Euler deconvolution