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|Title:||Sr ISOTOPIC ANALYSIS OF RAIN WATER OF LUCKNOW|
EARTH SCIENCE ENGINEERING
|Abstract:||Monsoons play a vital role in bringing about precipitation on to the earth's surface and thereby increasing the surface runoff. The atmospheric precipitation includes water vapour, dust particles, and some anthropogenic materials which affects the chemical composition of rainfall. Due to heavy rain during the pre-monsoon period the 87Sr/86Sr isotopic ratios increases and with the passage of time this ratio keeps on decreasing till the retreat of monsoon. The present study encompasses the determination of 87Sr/86Sr isotopic ratios of rainwater samples from the roof of Geology Department, Lucknow University. For this purpose 6 samples have been collected from Lucknow University and the analysis has been carried out in Institute Instrumentation Centre, IIT Roorkee. The study also encompasses to check the effect of monsoon on the Sr isotopic ratios during the rain events from July to January. From the study it is seen that the Sr concentration in rainwater is generally variable and fluctuating according to aerosol sources. The 87Sr/86Sr ratio is varying between 0.71210 to 0.71625 which clearly indicates that the source is of crustal origin and the most suitable candidate for the crustal dust incorporated in rain water is from local as well as distant continental bedrock and soil which are more radiogenic. It is also observed that the Sr isotopic ratios are decreasing with the passage of monsoon which indicates that the monsoon has a major role to play with the change in the Sr isotopic ratios.|
|Appears in Collections:||MASTERS' DISSERTATIONS (Earth Sci.)|
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