Radon, helium and uranium survey in some thermal springs located in NW Himalayas, India: mobilization by tectonic features or by geochemical barriers?

摘要: Radon, helium and uranium measurements have been carried out in hot water springs the Parbati Beas valleys of Himachal Himalaya. Most these are known as famous pilgrimage centers. The activity dissolved radon liquid phase is found to vary widely, by an order magnitude, between 10 750 Bq L−1, whereas, content thermal varies 100 ppm. contents low from <0.01 5 μg L−1. measured values radon, possibly controlled structural geology, namely presence pervious fault systems, lithology leached host rocks. Redox-potential geochemical barriers cause mobilization uranile ions solution (UO2+); most plausible hypothesis when conditions oxidising, confirming importance physico-chemical up supergenic environment, control fluid geochemistry U–He–222Rn system. Some evidence available both geothermometric considerations data which will be reported elsewhere, whereas present study focused on U decay series–noble gas geochemistry. first analysis collected 3He/4He consistent with a crustal signature at studied springs.