Magnetic and Radiometric Signatures over a Proterozoic Massive Sulfide Setting of Northern Fringe of Dalma Volcanics, Eastern India: An implication to Metallogeny

Authors

  • Pramod Kumar Yadav
     Formerly at Centre of Advanced Study, Department of Applied Geophysics, Indian School of Mines, Dhanbad
  • P. K. Adhikari
     Uranium Corporation of India Limited, Jaduguda, East Singhbhum
  • Shalivahan
     Centre of Advanced Study, Department of Applied Geophysics, Indian School of Mines, Dhanbad
  • Anurag Tripathi
     Formerly at Centre of Advanced Study, Department of Applied Geophysics, Indian School of Mines, Dhanbad
  • Shailendra Singh
     Formerly at Centre of Advanced Study, Department of Applied Geophysics, Indian School of Mines, Dhanbad
  • Roshan K. Singh
     Centre of Advanced Study, Department of Applied Geophysics, Indian School of Mines, Dhanbad
  • Ashish K. Bage
     Formerly at Centre of Advanced Study, Department of Applied Geophysics, Indian School of Mines, Dhanbad

DOI:

https://doi.org/10.1007/s12594-017-0682-z

Abstract

Magnetic and radiometric surveys were carried out over a felsic dominated rifted margin of Proterozoic volcanic terrain of a mobile belt in the eastern India. The studies were made in blocks I and II of 0.65 sq km and 0.70 sq km respectively over a previously identified conductor in the northern fringe of Dalma Volcanics (DVs). In general, both the blocks show high magnetic signature associated with sulfide mineralisation. The interpretation of magnetic data suggests that nature of the causative source is mainly horizontal cylinder in both the blocks. The depth to the top of the causative source is about 25 m in both the blocks and extends upto 60 m in block I and 40m in block II. Gamma count rate exhibits about a factor of two to three enhancements above the field background for both the blocks. The obtained iso-rad maps are similar to uranium and copper belt in the Singhbhum shear zone south of the study area. The anomalous radiometric signature of the residual soil/rock of the area indicates towards hydrothermal alteration. The detailed magnetic surveys and preliminary iso-rads results seems quite encouraging and may be attributed to VMS setting in the area and potential sulfide mineralisation with uranium mineral association in the DVs province.

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Issue

Volume 89, Issue 6, June 2017 Pages (617-740)

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Articles

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Published

2017-06-01

How to Cite

Yadav, P. K., Adhikari, P. K., Shalivahan, ., Tripathi, A., Singh, S., Singh, R. K., & Bage, A. K. (2017). Magnetic and Radiometric Signatures over a Proterozoic Massive Sulfide Setting of Northern Fringe of Dalma Volcanics, Eastern India: An implication to Metallogeny. Journal of Geological Society of India, 89(6), 705–710. https://doi.org/10.1007/s12594-017-0682-z
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