Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

H. S. Virk ¹, Anand K. Sharma ¹, Naresh Kumar ¹

Affiliations
1 Department of Physics, Guru Nanak Dev University, Amitsar - 143005, IN

Abstract

India has more than 300 thermal springs spread over the entire geographical area of the sub-continent Some of these springs have linkage with Indian mythology and are famous pilgrimage centres since historical times. The temperature of water recorded in these springs varies from 40°C to that of steam. Some of them are being exploited as a source for geothermal energy.

The purpose of this study is to measure radon and helium activity in the thermal springs of Himachal Himalaya. Radon is estimated in the soil and thermal waters using alpha spectrometry and scintil1ometry, respectively. The radon activity is maximum (716.3 Bq/L) in thermal spring (3) at Kasol and minimum (15.9 Bq/L) in a natural spring (bauli) at Takrer Radon concentration is highly variable in the Parbati valley with minimum value of 2230±430 Bq/m³ recorded at Chhinjra on the banks of river Parbati and a maximum value of 57700±2050 Bq/m³ at Dharmaur, the site of uranium ore exploitation by the AMD(DAE). Helium is estimated in the thennal springs by using a Helium Leak Detector (sniffing technique). The radon and helium contents of Kasol thermal springs are correJatable with high radioactivity in the soil of the area as revealed by Alpha Guard survey in the environs of Parbati valley. The helium content recorded in thermal springs is found to vary between 15-90 ppm.

Radon and Helium are well established as geochemical precursors for earthquake prediction studies. Helium/Radon ratio seems to be a better predictive tool for earthquakes in comparison to individual radon and helium precursors.

Keywords

Thermal Springs, Earthquake, Lineaments, Radon, Helium, Alpha Spectrometry, Himachal Himalaya.

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S. L. Koul ¹, H. S. Virk ¹

Affiliations
1 Department of Physics, Panjabi University, Patiala, IN

Abstract

Fission track ages of 10 samples of muscovite and biotite collected from different areas of Paddar Valley, Kishtwar (J and K State, India) have been determined. The mean ages obtained for this region for muscovite and biotite are 6.9±1.4 and 38.2±4.2 m.y, respectively. The micaceous minerals have been found to contain low concentration of Uranium ∼ 10^-10 atom/atom. The f.t. ages correspond to the Tertiary era of the great Himalayan range and agree very well with the f.t. ages determined for the Himalayan orogeny.

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