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
Singh, R. P.
- Application of Soil Radon and Trace Element Geochemistry for Uranium Exploration at Kuchanapalle, Guntur District, Andhra Pradesh
Authors
1 Atomic Minerals Directorate for Exploration and Research, New Delhi, IN
2 Atomic Minerals Directorate for Exploration and Research Jamshedpur, IN
3 Atomic Minerals Directorate for Exploration and Research, Hyderabad-16, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 1 (2000), Pagination: 89-96Abstract
A radioactive fault breccia zone trending N30°E is exposed intermittently within the puru granite dome, near Kuchanapalle village in the NE margin of Cuddapah basin. A major part of the fault zone is under soil cover. Within this fault zone, a dark coloured ferruginous and uraniferous fault breccia is exposed over an area of 150m x 2.5m. In order to trace the continuity of the concealed fault zone, the uraniferous breccia zone was tested by closed circuit soil-gas radon (CCT) measurement, solid state nuclear track detection (SSNTD) survey, and trace element analysis of augur-hole soil samples. Radon levels in 164 auger holes vary from 9 to 863 per 50 sec. The alpha track density on cellulose nitrate films used in SSNTD surveys varies from 27 to 820 per sq. mm. The iso-alpha track density map has confirmed the anomalous patterns obtained by the soil-radon survey.Trace element data of soil samples have been processed using R-mode factor analysis of correlation matrix. These data along with radon and SSNTD surveys have thus been found to be very effective in delineating the extension of the radioactive breccia zone under soil cover, up to 1200 m towards north.
Keywords
Economic Geology, Exploration Geochemistry, Soil Radon Surveys, Uranium, Cuddapah Basin, Andhra Pradesh.
- Dykes as Groundwater Loci in Parts of Nashik District, Maharashtra
Authors
1 Central Ground Water Board, 217, Civil Lines Bareilly - 243 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 59, No 2 (2002), Pagination: 143-146Abstract
Field observations and analyses of the pumping test data of dug wells in parts of Nashik District show that dykes act as potential aquifers when they are jointed/fractured. On the other hand, when they lack primary porosity and permeability and are not jointed/fractured, they act as groundwater barriers. In such a case the upslope of the terrain functions as a good repository, while the downslope remains unproductive. In both the cases, as dykes help to find promising water-bearing formations, they may be referred to as loci of groundwater.Keywords
Groundwater, Dykes, Nashik District, Maharashtra.- Groundwater Status in Dhund River Basin, Jaipur District, Rajasthan
Authors
1 Department of Geology, Rajasthan University, Jaipur, IN
2 Central Ground Water Board, 2, Ankitpuram, G M S Road, Dehradun, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 5 (2006), Pagination: 809-818Abstract
The Dhund, an ephemeral river along its subsidiary drainage system forms a N-S elongated river basin in the Semi-Desert terrain of Jaipur District. The groundwater occurring in the aquifer zones of granite gneisses quartzites and alluvial formations is dwindling due to excessive mining of groundwater during the last one decide.In spite of high rainfall from 1989 to 1996 the declining trend of water levels are not reversed in major part of the area The falling water table can only be checked by proper groundwater management.
Keywords
Groundwater, Dhund River Basin, Rajasthan.- Hydrogeology of a Buried Channel, Village Shenoli, District Satara, Maharashtra
Authors
1 Centre for Water Management & Research, University of Rajasthan, Jaipur - 302 004, IN
2 Central Ground Water Board, 419 - A, Kanwali Road, Balliwala, Dehradun-248 001, IN
3 Wadia Institute of Himalayan Geology, # 33, GMS Road, Dehradun – 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 80, No 3 (2012), Pagination: 363-368Abstract
A buried channel has been located, in the basaltic terrain, near village Shenoli, District Satara, Maharashtra. It is composed of a gritty mass formed of a semi-consolidated material. The resistivity value of the semi-consolidated formation is 6.30 Ohm - m whereas the resistivity values of the vesicular basalts range between 18 and 32 Ohm-m. The specific capacity, unit area specific capacity, specific capacity index, transmissivity and hydraulic conductivity, with respect of the buried channel, are 609.07 LPM/m of drawdown, 12.12 LPM/m3, 95.47 LPM/m2, 353.26 m2/day and 55.37 m/day, respectively whereas the values of these parameters for basalt aquifers range from 67 to 117 LPM/m of drawdown, 0.7 to 4.27 LPM/ m3, 14.08 to 31.04 LPM/m2, 33.5 to 73.71 m2/day and 9.44 to 18.32 m/day, respectively. A comparison of the well characteristics and aquifer parameters reveal that the buried channel with semi-consolidated formation has distinctly better groundwater yielding properties.
The groundwater from the semi-consolidated formation has distinctly different quality. The electrical conductivity (EC) of the water from the basalt aquifers ranges between 417 and 555 micro mhos/cm with a modal value of 430 micro mhos/cm, which is 960 micro mhos/cm at 25° C for the semi-consolidated material forming the buried channel. The plots on the Trilinear diagram show that all the samples fall in field 5 where alkaline earths exceed alkalies and weak acids exceed strong acids but it is clear that the proportion of alkalies and weak acids in the water from the buried channel aquifer is higher than the water from the basalt aquifers.
Keywords
Specific Capacity, Transmissivity, Hydraulic Conductivity, Hydrochemistry, Buried Channel, Basaltic Terrain, Maharashtra.References
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