Hydrogeochemical exploration for unconformity-related uranium mineralization: example from Palnadu sub-basin, Cuddapah Basin, Andhra Pradesh, India

The chemical and isotopic compositions of river and groundwater reflect the different natural processes that provide chemical elements to the dissolved load, i.e. mainly the weathering of rocks and soils, atmospheric inputs and anthropogenic disturbances.This study reports on the geochemistry of surface-and groundwater along a part of the Subarnarekha River system (north-eastern India) collected during monsoon and dry season, during a monitoring program aimed at evaluating impacts of mining and metallurgy on the river system.The aquifer is of fracture type and the seasonal behaviour, groundwater flow conditions and pollutant transfer were observed through a network of 69 wells with typical depths of 50 meters.Geochemical observations, including major cations and anions, trace element concentrations and isotopic tracing (stable isotopes of the water molecule, strontium isotopes) come to conclusions on the origin and the relationships between the surface-and groundwater in the studied catchment.A large range of salinities is observed in surface-and groundwater, both for dry or wet periods.Surface water samples plot within the field HCO 3 -Ca during both water stages. Most groundwater samples plot within the field of Ca-SO 4 water type and HCO 3 -Ca water type. This reflects the high Ca input in groundwater, other than weathering. Such inputs could be related to (i) carbonate amendments used in agricultural practices and (ii) residues from ore processing.

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“…Pumping affects groundwater quality through salinity increase and heavy metal contamination, (Kamra et al, 2002;Singh et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical processes, mixing and isotope tracing in hard rock aquifers and surface waters from the Subarnarekha River Basin, (east Singhbhum District, Jharkhand State, India)

et al. 2007

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“…Uraninite, pitchblende, kasolite and uranophane are the main uranium minerals present in the deposits of Lambapur and Peddagattu (Sinha et al 1995). The primary uranium mineralization is of epigenetic hydrothermal in nature (Singh et al 2002). Lambapur mineralized zone occurs at shallow depth of about 10-15 m whereas it occurs below 50 m or more in Peddagattu.…”

Section: Geologymentioning

confidence: 99%

“…The presence of indoor radon/thoron concentration in this area was reported by Reddy et al (2003). Singh et al (2002) studied the uranium concentration (0.5 to 410 ppb) in groundwater in Palnadu sub-basin which is located adjacent to the present study area. The causes for the presence of high fluoride concentration in groundwater of parts of Nalgonda district was reported by Brindha et al (2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variation of uranium in a shallow weathered rock aquifer in southern India

2011

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Uranium occurs naturally in groundwater and surface water. The objective of this study is to understand the causes for the occurrence of uranium and its spatio-temporal variation in groundwater in a part of Nalgonda district, Andhra Pradesh, south India. Uranium deposits occur in the southeastern part of this area. Groundwater samples were collected from 44 wells every two months from March 2008 to January 2009. The samples were analyzed for pH, ORP and uranium concentration. The uranium concentration in groundwater varies from 0.2 ppb to a maximum of 68 ppb with a mean of 18.5 ppb. About 21.6% of the samples were above the drinking water limit of 30 ppb set by USEPA. The uranium concentration varied with fluctuation in groundwater level, pH and ORP. Uranium concentration in groundwater changes depending on lithology, degree of weathering and rainfall recharge.

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“…Uranium concentration in groundwater depends on several factors including lithological, geomorphologic and other geological conditions of the area (Sridhar-Babu MN, 2008). Uranium estimation of water systems of India has been reported by some authors likely Singh et al, 1984Singh et al, , 1995Singh et al, , 2001Singh et al, , 2002Singh et al, , 2008Ramola et al, 1988;Sarin et al, 1992 …”

Section: …………………………………………………………………………………………………… Introduction:-mentioning

confidence: 97%

“…U was analyzed by using laser fluorimeter. The uranium concentration in the groundwater of this region ranges from 0.1 ppb to 24 -. It is inferred that most of the samples are fresh to slightly saline in nature.…”

mentioning

confidence: 97%

“A Study on the Statistical Estimation of Uranium Ion in Groundwater of Cuddalore District, Tamilnadu, India”.

Paramaguru¹,

Anandhan²,

Chidambaram³

et al. 2017

IJAR

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The present study aim to examine mapping of uranium distribution in the Cuddalore district, Tamil Nadu, India. Uranium is a relatively abundant element with the highest atomic number of all naturally occurring elements. The occurrences of groundwater are identified porous formation and in fractured and the weathered hard rock aquifer matrix. The geology of the district underline by different range of age from oldest Archean rocks to recent sediments. The study area occupy in 3,678 Sq.km. Totally 93 groundwater samples were collected during Pre-Monsoon, 2015. The collected samples were analyzed for major cations and anions in standard scientific manner. U was analyzed by using laser fluorimeter. The uranium concentration in the groundwater of this region ranges from 0.1 ppb to 24.67 ppb with an average of 1.

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Hydrogeochemical exploration for unconformity-related uranium mineralization: example from Palnadu sub-basin, Cuddapah Basin, Andhra Pradesh, India

Cited by 28 publications

References 7 publications

Hydrogeochemical processes, mixing and isotope tracing in hard rock aquifers and surface waters from the Subarnarekha River Basin, (east Singhbhum District, Jharkhand State, India)

Hydrogeochemical processes, mixing and isotope tracing in hard rock aquifers and surface waters from the Subarnarekha River Basin, (east Singhbhum District, Jharkhand State, India)

Spatial and temporal variation of uranium in a shallow weathered rock aquifer in southern India

“A Study on the Statistical Estimation of Uranium Ion in Groundwater of Cuddalore District, Tamilnadu, India”.

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