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Venkataraman, K.
- Uranium in Carbonaceous Clays in Neyveli South Arcot, Madras State
Authors
1 Jaduguda Mines Project, Department of Atomic Energy, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 7 (1966), Pagination: 129-133Abstract
Since some low-rank coals have been found to contain significant amounts of uranium in several countries, the recently exposed Lignite bed at Neyveli, S. Arcot, was examined for its uranium content. Though the lignite itself was found to contain only a poor amount of uranium, a carbonaceous clay bed immediately overlying the lignite showed uranium in amounts varying from .005% to .086%. From the nature of the occurrence and the radio active disequilibrium seen in the clays, the uranium appears to have been emplaced in the clays by groundwater, which leached it from the crystalline rocks to the north and north-west of Neyveli. Uranium is apparently present in the carbonaceous clays as urano organic complex.
- A Statistical Approach to the Study of Uranium Mineralisation at Jaduguda, District Singhbhum (Bihar)
Authors
1 Uranium Corporation of India, Jaduguda, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 16, No 3 (1975), Pagination: 354-360Abstract
The tenor of uranium ore in the mineralised field of Jaduguda has been statistically analysed. Distribution, the variations of the tenor in different directions and the continuity of mineralisation in the different directions (using the geo-statistical parameter, variogram) have been studied and it has been found that the distribution of the metal in Jaduguda is log-normal and the variations of tenor in the different directions are unique parameters in the mineralised tract. The variograms for tenor in Jaduguda are found to be of the 'transitive' type. The frequency histogram of the tenor of the ore across the strike, brings out the possibility of the mix-up of two populations, in the central portion of the deposit, probably by post mineralisation structural deformations like strike-slip faults.- Petrography and Petrochemistry of the Kimberlite and Associated Volcanic Rocks of the Jungel Valley, District Mirzapur, U.P., India
Authors
1 Geological Survey of India, Lucknow 226006, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 18, No 12 (1977), Pagination: 653-661Abstract
The kimberlite plugs and the associated volcanics of the Jungel valley occur within the Bijawar Group. The Jungel ultramafics occur in the form of plugs. Serpentinization and calcitization are common. The rock has 53% serpentine, 17% calcite, 14% opaque minerals, 5% pseudomorphs of olivine and pyroxene, 6% tremolite-actinolite and 5% chlorite and glass. The rock is porphyritic in texture and agglomeratic in nature.
Percentage of oxides and oxide ratios of the Jungel samples are comparable to those of the known kimberlites of the world. The normative composition of 17 samples analysed has brought out the special feature of the kimberlite, viz., its unusually high apatite and ilmenite and the general lack of clinopyroxene in the rock. The oxide relationship in the form of ternary plots falls within the kimberlite field and the electron microprobe analyses confirm the kimberlitic nature of the plug rock.