Authors / CoAuthors
Jankowski, J. | Acworth, I.
Abstract
Fresh to brackish groundwaters in the range of 250 to 2250 mglL occur in fractured bedrock aquifers beneath dryland salinity sites at Yass in the Southern Tablelands of New South Wales. The fractured bedrock in these catchments comprises marine, early Paleozoic slates, shales and sandstones in Dicks Creek and Williams Creek catchments, and porphyritic dacite and rhyodacite in Spring Creek catchment. The groundwaters are known to originate from recent meteoric waters. The waters represent various hydrochemical types, generated by chemical processes through water-rock interactions along their flow paths. The present chemical composition of major cations and anions in groundwaters from these catchments is derived from the following processes: 1. water-rock interaction in recharge zones where dissolution of minerals and oxidation processes occur, 2. ion-exchange and reverse ion exchange reactions with clay where it is present in fractures and veins in the bedrock, and 3. microbially mediated reactions with organic matter which produce very low redox potentials.
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document
eCat Id
81362
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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2601
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Keywords
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- GA PublicationJournal
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- NSW
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1993-01-01T00:00:00
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geoscientificInformation
Series Information
AGSO Journal of Australian Geology and Geophysics 14:2-3:279-285
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Unknown
Parent Information
Extents
[-35.16, -34.45, 148.44, 149.46]
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