Noble-gas evidence for geothermal activity in a karstic terrain: Rocky Mountains, Canada.

Details Noble-gas evidence for geothermal activity in a karstic terrain: Rocky Mountains, Canada. Noble-gas evidence for geothermal activity in a karstic terrain: Rocky Mountains, Canada.

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.1111m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 47, Issue 6, pp.1111-1115

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Scientific paper

Geothermally heated fluids are identified as a component in warm (up to 54°C) springs in the southern Canadian Rocky Mountains. High concentrations of radiogenic He (10 -3 ccSTP/cc gas) and atmospheric Ne, Ar, Kr and Xe in the gases that vigorously bubble at the Fairmont Hot Spring, assign the latter to be a "drowned" fumarole, fed by geothermal steam. Up to 75% depletions in the atmospheric noble gases in several warm springs indicate contributions of residual geothermal water. On the other hand, in a few cases noble gases were found in excess ( W ) over the expected concentrations in airequilibrated recharge water. The observed "reversed" pattern of w nc > W Ar > W kr > W xe is interpreted as excess air, incorporated during recharge through karstic conduits. The mixing ratios of geothermal and karstic waters can be deduced.

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