Page 151 - Hydrogeology Principles and Practice

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36 Cl age (ka)* 58–94 47–190 160–290 380–490 550–790 540–670 460 30–530 110–580 200–540 200–470 250–400 270–340 600–710

Environmental isotope data and modelled 36 Cl ages for groundwaters from the south-west margin of the Great Artesian Basin (26°30′–28°30′S; 133°30′–136°30′E).
36 Cl × 10 6 × (atoms L −1 ) 1888 ± 140 2520 ± 235 2026 ± 160 1162 ± 110 1186 ± 125 934 ± 60 594 ± 65 439 ± 60 444 ± 65 780 ± 85 1030 ± 85 1478 ± 175 1296 ± 140 1914 ± 250 1691 ± 210 1295 ± 85 1149 ± 130 1135 ± 145 1012 ± 115 969 ± 210 461 ± 60

36 Cl/Cl × 10 −15 × 129 ± 8 132 ± 10 108 ± 7 102 ± 8 109 ± 10 89 ± 4 52 ± 5 25 ± 3 31 ± 4 134 ± 13 115 ± 8 54 ± 6 54 ± 5 47 ± 5 41 ± 4 37 ± 3 40 ± 4 46 ± 5 53 ± 5 61 ± 1.2 29 ± 3

14 C (pmc) 6.6 ± 1.2 11 ± 1.3 2.4 ± 1.2 2.5 ± 2.5 2.0 ± 2.0 1.7 ± 1.2 49.1 ± 5.1 41.2 ± 4.5 1.8 ± 1.2 3.3 ± 1.2 3.8 ± 1.2

d 13 C (‰ PDB) −11.0 −10.6 −11.7 −11.1 −11.7 −11.6 −11.0 −10.4 −8.9 −10.9 −11.4 −11.9 −11.5 −10.7

V SMOW )

d 18 O (‰ −5.84 −5.97 −6.33 −6.71 −6.66 −6.56 −6.71 −6.35 −6.61 −4.85 −3.81 −5.02 −5.16 −4.89 −5.10 −5.47 −5.29 −5.73 −5.68 −6.07 −6.56

(‰ V SMOW )

d 2 H −46.3 −42.6 −49.7 −47.6 −51.3 −45.7 −48.2 −42.7 −49.5 −35.7 −33.0 −39.4 −40.0 −38.5 −39.4 −41.4 −43.3 −42.8 −42.0 −44.1 −46.4

Distance along transect (km) 47 61 71 129 145 154 203 246 261 96 6 33 43 67 80 89 95 114 136 141 183 * Age range calculated using equation 4.16 and two variants to allow for the addition of Cl via leakage or diffusion from an adjacent aquitard. † Data for the unconfined Appatinna Bore have been used to determine the initial 36 Cl/Cl ratio.

Sample name Lambina Homestead Warrungadinna Lambina Soak Marys Well 3 Murdarinna 2 Midway Bore Oodnadatta Town Bore 1 Watson Creek 2 Duckhole 2 (24701) Appatinna Bore† C.B. Bore Ross Bore Evelyn Downs Homestead Woodys Bore Windmill Robyns Bore 2 Ricky Bore 2 Paulines Bore Nicks Bore Leos Bore Fergys Bore Lagoon Hill Drill Hole 15 (New Peake)

After Love et al. (2000). Northern Transect (NW to SE) 574400015 574400003 574400004 584300025 584300026 594300017 594200001 604200021 614200004 574300005 Southern Transect (W to E) 574100007 574100014 574100049 584100053 584100050 584100011 594100003 594100017 594100013 594100006 604100037 pmc, % modern carbon.

Table 4.2 Unit number