Refine your search
Collections
Co-Authors
Journals
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Yugandhara Rao, A.
- Uranium-Bearing Magnesian-Calcrete in Surficial Environment from Khemasar, Churu District, Rajasthan, India
Abstract Views :209 |
PDF Views:88
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Vishakapatnam 530 007, IN
2 Atomic Minerals Directorate for Exploration and Research, Jaipur 302 033, IN
3 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
1 Atomic Minerals Directorate for Exploration and Research, Vishakapatnam 530 007, IN
2 Atomic Minerals Directorate for Exploration and Research, Jaipur 302 033, IN
3 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
Source
Current Science, Vol 108, No 8 (2015), Pagination: 1540-1544Abstract
Magnesium-bearing calcretes of soft-gritty and hard pan varieties containing uranium concentrations from 16 to 74 ppm with <10 ppm of thorium are located along the Saraswati palaeochannel at Khemasar village, Churu district, Rajasthan. The uraniumbearing calcretes are exposed over an areal extent of 300 m × 200 m with thickness of up to 2 m in an interdunal depression. The silty sand layer occurring below the calcrete horizon suggests that it is a valley-fill calcrete, deposited along a palaeochannel. This occurrence of uraniferous Mg-calcrete in the Saraswati river palaeochannel opens up a large area for uranium exploration in the calcrete environment of Thar Desert. These calcretes are composed of 15.94% to 25.39% CaO, 7.15% to 22.39% MgO and Sr/Ba ratio up to 66.98. There is a positive correlation of U with Sr/Ba and MgO. The high Sr/Ba ratio and MgO indicate water of saline nature and high rate of evaporation. Ephemeral centripetal drainage mixing with the dissected palaeochannel waters and groundwaters, under arid climatic conditions might have resulted in the formation of this kind of uranium-bearing calcrete in fluvio-lacustrine environment.Keywords
Fluvio-Lacustrine Environment, Khemasar, Magnesian Calcrete, Surficial Type Uranium.- Anomalous REE Concentration in Carbonate-Phosphate Bearing Phases from Narasimharajapuram Area, Visakhapatnam District, Andhra Pradesh
Abstract Views :316 |
PDF Views:86
Authors
Affiliations
1 BSOI Group, 39-3-23/5 to 9, BVR mansions, Near Masjid Bus Stop, Murali Nagar, Visakhapatnam 530 007, IN
2 AMD Complex, Begumpet, Hyderabad 500 016, IN
1 BSOI Group, 39-3-23/5 to 9, BVR mansions, Near Masjid Bus Stop, Murali Nagar, Visakhapatnam 530 007, IN
2 AMD Complex, Begumpet, Hyderabad 500 016, IN