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Table 2 Chemical and stable isotopes results for confined aquifer systems
From: Groundwater age and hydrothermalism of confined aquifers in the Argentine Pampean plain
pH | EC (μS/cm) | HCO3 − (mg/L) | SO −24 (mg/L) | Cl− (mg/L) | Na+ (mg/L) | K+ (mg/L) | Ca+2 (mg/L) | Mg+2 (mg/L) | SiO2 (mg/L) | Li (µg/L) | ɛ (%) | δ18O (‰) | δ2H (‰) | 3H (TU) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A1 CAS (n = 5) | C7 | 7.64 | 2470 | 520.0 | 770.0 | 157.1 | 503.5 | 19.9 | 83.6 | 31.5 | 42 | 60 | 0.4 | −5.0 | −29 | 1.5 ± 0.2 |
C8 | 7.58 | 2170 | 405.0 | 834.0 | 142.9 | 386.8 | 17.7 | 114.8 | 24.1 | 40 | nd | 6.4 | −4.9 | −29 | nd | |
C9 | 7.71 | 2510 | 445.0 | 878.6 | 151.4 | 482.3 | 19.3 | 87.2 | 32.2 | 44 | nd | 3.1 | −4.8 | −25 | 2.1 ± 0.2 | |
C20 | 7.95 | 2170 | 407.5 | 634.9 | 131.4 | 429.7 | 17.4 | 81.6 | 24.1 | nd | nd | −2.6 | −4.8 | −28 | nd | |
C22 | 7.80 | 1960 | 310.0 | 476.2 | 148.6 | 394.3 | 16.4 | 64.8 | 21.0 | 99 | 70 | −7.2 | −5.4 | −32 | 1.6 ± 0.4 | |
A2a CAS (n = 5) | C1 | 7.87 | 1870 | 370.0 | 625.2 | 112.9 | 382.2 | 16.0 | 64.0 | 23.9 | 44 | nd | 0.9 | −5.4 | −31 | 1.5 ± 0.2 |
C6 | 7.50 | 3050 | 440.0 | 806.2 | 164.3 | 580.4 | 23.0 | 98.0 | 45.4 | nd | nd | −8.6 | −4.6 | −28 | nd | |
C10 | 7.74 | 2240 | 335.0 | 719.9 | 144.3 | 449.9 | 16.4 | 87.2 | 17.8 | 47 | 70 | −1.8 | −5.2 | −25 | nd | |
C11 | 7.86 | 1872 | 302.5 | 582.0 | 97.1 | 316.0 | 15.2 | 82.4 | 18.5 | 51 | 50 | 0.7 | −5.3 | −27 | 2.1 ± 0.2 | |
C13 | 7.77 | 1786 | 275.0 | 488.7 | 95.7 | 303.3 | 13.8 | 81.6 | 11.7 | 50 | 60 | −2.7 | −4.9 | −28 | 2.5 ± 0.2 | |
A2b CAS (n = 11) | C2 | 7.85 | 1268 | 275.0 | 376.2 | 78.6 | 219.9 | 12.2 | 52.0 | 7.8 | 79 | nd | 6.2 | −5.9 | −37 | 1.8 ± 0.4 |
C3 | 7.80 | 1298 | 317.5 | 350.0 | 77.1 | 232.1 | 13.5 | 47.2 | 8.3 | 85 | nd | 6.0 | −5.5 | −34 | nd | |
C4 | 7.72 | 1850 | 225.0 | 624.5 | 211.4 | 390.3 | 11.9 | 55.2 | 8.8 | 42 | 60 | 5.4 | −6.6 | −42 | nd | |
C5 | 7.85 | 1713 | 230.0 | 497.1 | 150.0 | 321.5 | 11.1 | 48.0 | 6.1 | 57 | nd | 4.3 | −6.1 | −41 | nd | |
C15 | 8.15 | 1484 | 230.0 | 502.6 | 85.7 | 289.2 | 10.7 | 52.8 | 4.4 | 43 | 50 | 3.2 | −4.9 | −31 | 1.5 ± 0.4 | |
C16 | 8.16 | 1286 | 230.0 | 433.3 | 65.7 | 230.5 | 11.4 | 53.6 | 6.3 | 41 | nd | 4.7 | −4.8 | −30 | nd | |
C17 | 8.04 | 944 | 217.5 | 276.2 | 57.1 | 190.1 | 9.2 | 29.6 | 2.9 | 83 | 50 | 4.3 | −5.5 | −34 | nd | |
C18 | 8.14 | 1140 | 210.0 | 253.6 | 127.1 | 242.7 | 6.9 | 24.0 | 1.5 | 48 | 50 | 2.1 | −6.5 | −41 | nd | |
C19 | 7.75 | 1458 | 200.0 | 370.2 | 175.7 | 262.9 | 9.4 | 32.8 | 2.9 | 42 | nd | 9.1 | −6.5 | −43 | nd | |
C21 | 7.73 | 1377 | 253.3 | 414.3 | 111.4 | 257.8 | 12.9 | 48.0 | 7.1 | nd | nd | 5.5 | −6.5 | −38 | 1.8 ± 0.4 | |
C23 | 7.41 | 1246 | 245.0 | 384.5 | 80.0 | 236.6 | 10.5 | 41.6 | 4.4 | 86 | nd | 5.5 | −6.3 | −34 | nd |