Refine your search
Collections
Co-Authors
Journals
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
Nanda, L. K.
- Anomalous Silver Concentration in Volcano-Plutonic Rocks of Siwana Ring Complex, Barmer District, Western Rajasthan
Abstract Views :271 |
PDF Views:97
Authors
Rajeev Bidwai
1,
S. Srinivasan
1,
L. K. Nanda
1,
Atanu Banerjee
1,
P. N. Bangroo
1,
A. K. Rai
2,
P. S. Parihar
2
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 030, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
1 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 030, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
Source
Current Science, Vol 106, No 2 (2014), Pagination: 159-162Abstract
No Abstract.- Anomalous Silver Concentration in Volcano-Plutonic Rocks of Siwana Ring Complex, Barmer District, Western Rajasthan
Abstract Views :253 |
PDF Views:88
Authors
Rajeev Bidwai
,
S. Srinivasan
,
L. K. Nanda
,
Atanu Banerjee
,
P. N. Bangroo
,
A. K. Rai
,
P. S. Parihar
Source
Current Science, Vol 106, No 3 (2014), Pagination: 367-367Abstract
No Abstract.- Recognition of a New Albitite Zone in Northern Rajasthan:Its Implications on Uranium Mineralization
Abstract Views :276 |
PDF Views:133
Authors
Affiliations
1 Jamshedpur 831 002, IN
2 Center for Remote Sensing, Bharthidasan University, Tiruchirappalli 620 023, IN
3 Thiruvananthpuram 659 012, IN
4 Hyderabad 500 016, IN
1 Jamshedpur 831 002, IN
2 Center for Remote Sensing, Bharthidasan University, Tiruchirappalli 620 023, IN
3 Thiruvananthpuram 659 012, IN
4 Hyderabad 500 016, IN
Source
Current Science, Vol 108, No 11 (2015), Pagination: 1994-1998Abstract
No Abstract.- Uranium-Bearing Magnesian-Calcrete in Surficial Environment from Khemasar, Churu District, Rajasthan, India
Abstract Views :219 |
PDF Views:91
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.- LREE–Nb Mineralization in the South Western Part of Ambadongar Carbonatite Complex, Chhota Udepur District, Gujarat, India
Abstract Views :579 |
PDF Views:82
Authors
B. Nagabhushanam
1,
S. Durai Raju
2,
K. L. Mundra
3,
S. D. Rai
1,
R. K. Purohit
1,
M. B. Verma
1,
L. K. Nanda
1
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Beach Sand and Offshore Investigations, Thiruvananthapuram 695 012, IN
3 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 033, IN
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Beach Sand and Offshore Investigations, Thiruvananthapuram 695 012, IN
3 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 033, IN
Source
Current Science, Vol 114, No 08 (2018), Pagination: 1608-1610Abstract
The Ambadongar sub-volcanic carbonatite alkali complex is located about 140 km east of Vadodara, Chhota Udepur district, Gujarat, India and falls in Survey of India Toposheet No. 46 K/1. The complex intrudes Bagh sandstone (Cretaceous) and overlying Deccan basalts (Eocene) and is situated in the Narmada rift zone. The carbonatites came into prominence in the early 1960s with significant discoveries of fluorite and conspicuous radioactivity located near Chhota Udepur, at Ambadongar, the erstwhile Baroda district, Gujarat. Earlier workers have clarified many aspects of the carbonatite complex.References
- Viladkar, S. G. and Dulski, P., N. Jb. Miner. Mh. Jg., 1986, 37–48.
- Sukheswala, R. N. and Udas, G. R., Sci. Cult., 1963, 29, 563–568.
- Subramaniam, A. P. and Parimoo, M. L., Nature, 1963, 198, 563–564.
- Viladkar, S. G., In International Carbonatite Workshop, GMDC Science & Research Centre, Ahmedabad, 5–11 December 1996, pp. 1–66.
- Viladkar, S. G., Bull. Geol. Soc. Finland, 1981, 17–28.
- Doroshkevich, A. G., Viladkar, S. G., Ripp, G. S. and Burtseva, M. V., Can. Mineral., 2009, 47, 1105–1116.
- Viladkar, S. G., In Geochemistry–Earths System Processes (ed. Panagiotaras, D.), 2012, pp. 485–500.
- Van Gosen, B. S., Open File Report 2009-1005, U.S. Department of the Interior and US Geological Survey, 2009, pp. 1–27.
- Uranium Mineralization in Metasediments of North Delhi Fold Belt of Buchara Area, Jaipur District, Rajasthan, India
Abstract Views :278 |
PDF Views:82
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 033, IN
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 033, IN
Source
Current Science, Vol 114, No 12 (2018), Pagination: 2437-2439Abstract
The Proterozoic Delhi Supergroup rocks of North Delhi Fold Belt (NDFB) is one of the prime targets for base metals, uranium and other economic mineral prospects.References
- Khandelwal, M. K., Jain, R. C., Dash, S. K., Padhi, A. K. and Nanda, L. K., Mem. Geol. Soc. India, 2010, 76, 75–85.
- Yadav, O. P., Hamilton, S., Vimal, R., Saxena, V. P., Pande, A. K. and Gupta, K. R., Explor. Res. At. Miner., 2002, 14, 109–130.
- Padhi, A. K. et al., Explor. Res. At. Miner., 2016, 26, 53–70.
- Sinha-Roy, S., Malhotra, G. and Mohanti, M., Geological Society of India, Geology of Rajasthan, 1998, 1st edn, p. 278.