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      https://www.ias.ac.in/article/fulltext/jess/109/01/0109-0115

    • Keywords

       

      Himalaya; springs; stable isotopes; altitude effect

    • Abstract

       

      Stable hydrogen (δD) and oxygen (δ18O) isotope ratios of the headwaters of the Indus and its tributaries, surface ice in glaciers, saline and fresh water lakes and thermal springs in the Himalayan and Trans-Himalayan (Kashmir) region are reported. The δ5D-δ18 relationship for the river samples shows a slope of 9.12 +-0.29 which agrees well with the estimate of 8.99 ±0.33 based on a simple Rayleigh fractionation model. The unique signature of a higher deuterium excess (d) of the ‘Western Disturbance’ is preserved in these samples. An altitude effect of -0.9 per mil/km is observed in the δ18O of Indus waters. At a lower altitude (Beas) the altitude effect is almost double, indicating that the altitude effect decreases with elevation in this region.

    • Author Affiliations

       

      Kanchan Pande1 J T Padia1 R Ramesh1 K K Sharma1 2

      1. Physical Research Laboratory, Ahmedabad - 380 009, India
      2. Wadia Institute of Himalayan Geology, Dehradun - 248 002, India
    • Dates

       
  • Journal of Earth System Science | News

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