Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

I. Bhattacharjee ¹, A. R. Mukundhan ¹, A. S. Sachan ¹, K. N. Tiwary ¹, R. M. Sinha ², R. K. Gupta ²

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy Nagpur- 440 001, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy Hyderabad - 500 016, IN

Abstract

No Abstract.

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Yamuna Singh ¹, K. D. P. Singh ¹, S. Srinivasan ¹, Jyotsna Chhabra ², R. K. Gupta ¹

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad- 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, West Block, R.K. Puram, New Delhi - 110 066, IN

Abstract

No Abstract.

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K. Mahendra Kumar ¹, Madhuparna Roy ², G. Behra ², P. S. Parihar ², R. K. Gupta ³, Jamger Singh ³

Affiliations
1 Atomic Minerals Directorate for Exploration and Research Shillong 793011, IN
2 Atomic Minerals Directorate for Exploration and Research New Delhi 10066, IN
3 Atomic Minerals Directorate for Exploration and Research Hyderabad 500016, IN

Abstract

Pegmatitic injections within the magnetite bearing granitoid host rare metal and rare earth mineralisation at Jaurahi, Sonbhadra district, Uttar Pradesh. The ore minerals identified are columbite, eschynite, samarskite, fergusonite, monazite, thorite, uranothorite and zircon in association with magnetite, ilmenite and rutile. Samples of mineralised pegmatite have analysed 0.65 to 4.42% Nb and 0.55 to 4.85% Y.

Keywords

Economic Geology, Pegmatite, Columbite, Granitoid, Chhotanagpur Gneissic Complex, Sonbhadra, Uttar Pradesh.

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Yamuna Singh ¹, K. D. P. Singh ¹, Jyotsna Chhabra ², S. Srinivasan ¹, Y. C. Sharma ², R. K. Gupta ¹

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, IN
2 R.K. Puram, West Block VII, New Delhi - 110 066, IN

Abstract

Koutekite and two polymorphs (i.e., alpha and beta) of domeykite (rare copper arsenide minerals) are reported for the first time from the uraniferous Lower Siwalik sandstones of the Romehra area, Hamirpur district, Himachal Pradesh. The calculated cell size of . alpha-domeykite (Cubic) is a₀ = 9.646 Å and that of betadomeykite (Hexagonal) is a₀ = 7.151 Å and c₀ = 7.304 Å. Koutekite (Hexagonal) has measured cell parameters of a₀ = 11.58 Å and c₀ = 14.55 Å. However, in koutekite of Romehra area an important interplanar spacing (d) at 2.081Å is merging with 'd' of beta dorneykite at 2.061Å and another interplanar spacing at 2.47Å exhibits comparatively higher intensity than the one published in JCPDS Data Card No.13-581. Association of domeykite with uraniferous sandstones points out that uranium mineralisation in Lower Siwaliks of the Romehra took place possibly below 90°C temperature.

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