Isotopic composition of noble gases in geothermal fluids of the Kru né Hory Mts., Czechoslovakia, and the nature of the local geothermal anomaly

Details Isotopic composition of noble gases in geothermal fluids of the Kru né Hory Mts., Czechoslovakia, and the nature of the local geothermal anomaly Isotopic composition of noble gases in geothermal fluids of the Kru né Hory Mts., Czechoslovakia, and the nature of the local geothermal anomaly

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49..695p&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 49, Issue 3, pp.695-699

Computer Science

2

Scientific paper

The contents and isotopic composition of all noble gases in the fluids from two localities (Karlovy Vary and Franti kovy Lázn ) in Western Czechoslovakia are given. The data show: (1) atmospheric Ne, Ar, Kr and Xe, which indicates meteoric recharge; (2) excess He, attributed to radiogenic contributions; (3) a small excess of Ne, but the data shed no light on its origin. Even though there is no evidence of any juvenile component in these mineral waters, part of the dissolved He is believed to be of deep (mantle) origin. Correlation between the ratio 3 He / 4 He and heat flow has been reported in the literature: our data enabled a direct test of this relationship and proved its fairly good validity. The combined interpretation of the heat flow and isotopic composition shows that the local heat flow anomaly in the Kru né Hory graben is of deep origin and was produced by the mass outflow which occurred during the Alpine activation of the Bohemian Massif.

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