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GEOREF RECORD

Ground waters with unradiogenic (super 87) Sr/ (super 86) Sr ratios in the Great Artesian Basin, Australia

Kenneth D. Collerson, William J. Ullman and T. Torgersen
Ground waters with unradiogenic (super 87) Sr/ (super 86) Sr ratios in the Great Artesian Basin, Australia
Geology (Boulder) (January 1988) 16 (1): 59-63

Abstract

Ground water from the major Jurassic aquifer in the Great Artesian Basin, Australia, shows significant variation in calcium and strontium concentration and strontium isotopic composition with age and distance from the recharge area. Hydrologically young bore waters in the eastern part of the basin exhibit surprisingly unradiogenic (super 87) Sr/ (super 86) Sr ratios (0.7045 to 0.7054). By contrast, hydrologically older waters in the central and discharge regions of the basin have significantly more radiogenic isotopic compositions (0.7060 to 0.7118). Waters with unradiogenic (super 87) Sr/ (super 86) Sr ratios are interpreted to be the result of reaction between recharge water in the aquifer and lithologies that have juvenile (super 87) Sr/ (super 86) Sr compositions. These juvenile strontium isotope signatures most likely reflect interaction with Cenozoic mafic igneous rocks which occur on the eastern side of the basin. More radiogenic waters in the basin are the result of addition of (super 87) Sr derived by in situ dissolution of aquifer silicates.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 16
Serial Issue: 1
Title: Ground waters with unradiogenic (super 87) Sr/ (super 86) Sr ratios in the Great Artesian Basin, Australia
Affiliation: Aust. Natl. Univ., Res. Sch. Earth Sci., Canberra, Australia
Pages: 59-63
Published: 198801
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 1988-019470
Categories: HydrogeologyHydrochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch maps
S27°30'00" - S25°45'00", E142°00'00" - E147°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1988
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