Hydrouranium anomalies as an effective tool in exploration of concealed unconformity related U-deposit in Srisailam sub-basin, Andhra Pradesh 鈥?Case study from Chitrial area
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- 作者：M. B. Verma (1) mohanbverma@hotmail.com
P. S. Dandele (2)
G. Nagendra Babu (2)
K. Umamaheswar (2)
P. B. Maithani (2) - 关键词：Hydrouranium contours – ; Chitrial plateau – ; Srisailam Formation – ; Accumulate contour map – ; Andhra Pradesh
- 刊名：Journal of the Geological Society of India
- 出版时间：November 2011
- 出版年：2011
- 期刊代码：73_0974-6889
- 类别：ear
- 卷：78
- 期：5
- 页码：468-476
- 数据来源：sp
摘要
Relationship of hydro-uranium anomalies (2-649 ppb) vis-脿-vis underlying uranium ore body has been attempted based on seventy nine water samples collected from the exploratory boreholes on the northern periphery of Srisailam sub basin, Nalgonda district, A.P. Water table is hosted in the granitoid aquifer which underlies the cover rocks of Srisailam Formation. TDS (total dissolved salt) range from 123 to 1088 ppm (x− = 329 ppm) and analyzed >500 ppm in eight samples. Water samples show a strong positive correlation of TDS with Cl− (r=0.90), Na+ (r=0.82), Mg (r=0.80) and a moderate positive correlation with Sr (r=0.48) and Ca (r=0.70). Low value (<0.4) of Normalised Magnesium (NMg) indicates that host rock aquifer has not undergone chloritisation. Accumulate contour plan of uranium ore body shows NW-SE trend and coincides with the hydro-uranium contour. Correlation sections of ore body display true as well as false hydro-uranium anomalies in N-S and E-W profiles. Hydro-uranium anomalies owe their origin to uranium cations, dissolved from the mineralized horizon in to groundwater. Hydro-geochemical orientation survey carried out at Chitrial plateau may be applied regionally in the Srisailam sub basin as an effective tool to explore the concealed unconformity type uranium mineralization below Srisailam Formation.