Noble gas composition of deep brines from the Palo Duro Basin, Texas

Details Noble gas composition of deep brines from the Palo Duro Basin, Texas Noble gas composition of deep brines from the Palo Duro Basin, Texas

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51...73z&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 51, Issue 1, pp.73-84

Mathematics

Logic

3

Scientific paper

Deep groundwaters in sedimentary basins can be sufficiently old (> 10 m.y.) to have accumulated both radiogenic 4 He and 40 Ar * . Differences in the ratio of( U + Th )/ K for aquifer lithologies lead to variations for 4 He / 40 Ar * in the groundwater. These variations can be used to resolve chronologically significant noble gas components. Application of a binary model to brine samples from the Palo Duro Basin, Texas yields (U, Th)- 4 He residence times of 100 to 300 m.y. Concentrations of two non-radiogenic noble gases ( 20 Ne and 36 Ar) provide information on the salinities of the water that recharged these aquifers.

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