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

Sunil Bajpai ¹, S. Srinivasan ², Ashok Sahni ³

Affiliations
1 Department of Earth Sciences University of Roorkee, Roorkee-247667, IN
2 Department of Geology, Bangalore University, Bangalore-560056, IN
3 Department of Geology, Panjab University, Chandigarh-160014, IN

Abstract

Chelonian fossil eggshell fragments are reported from the Late Cretaceous Infratrappean beds near Duddukuru, West Godavari District, Andhra Pradesh.

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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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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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