Geofluids

Research Article

Palaeohydrogeology and Transport Parameters Derived from 4He and Cl Profiles in Aquitard Pore Waters in a Large Multilayer Aquifer System, Central Australia

Table 1

Aquitard pore water chemistry, measured aquitard properties, groundwater chemistry in italics, and uranium and thorium concentrations in sediment samples.
FormationDepth
(m)		Elevation (m AHD)Water Level (m AHD)Temperature
°C		Hydraulic conductivity - (m/yr)Density - (g/cm3)Porosity - (% vol)Moisture content
(%)		Thorium (mg/kg)Uranium (mg/kg)4He (ccSTP/)Ne (ccSTP/)Ar (ccSTP/)Cl
(mg/L)		δ2H ( VSMOW)δ18O ( VSMOW)
Bulldog Shale (aquitard)0.00154.00              
10.80143.20  6.31 × 10−31.6558.1048        
Upper aquifer (J-aquifer)17.80136.20              
34.55119.45  1.89 × 10+11.8042.80192.320.96      
39.00115.00114.9625.2    1.121.088.70 × 10−81.87 × 10−72.61 × 10−46390−32.2−2.7
46.60107.403.15 × 10−12.4013.305  
Stuart Range Formation (aquitard)46.60107.40              
47.23106.78      1.121.08   6302
48.33105.68  3.15 × 10−42.2126.0011      
48.68105.33           6053  
50.68103.33109.6524.89      1.17 × 10−61.16 × 10−72.02 × 10−45532
52.23101.78           6029
53.70100.30  2.52 × 10−42.2625.0011        
55.5898.43        3.08 × 10−61.34 × 10−72.09 × 10−45416
56.7397.28           5222  
58.6095.40  6.31 × 10−52.2624.70111.211.23      
59.7394.28           5466
61.1392.88        5.73 × 10−61.28 × 10−72.11 × 10−45472
62.6391.38108.7324.92         5237
66.3887.63           4518
68.0086.00           5226
68.3085.70  1.26 × 10−22.3121.9010        
69.7384.28        9.38 × 10−61.24 × 10−72.09 × 10−4   
71.2582.75           6909
73.1580.85        9.65 × 10−61.70 × 10−61.02 × 10−35658
76.1577.85106.4425.36         5955
77.3076.70  1.89 × 10−52.3220.709        
78.2075.80        1.20 × 10−51.59 × 10−72.00 × 10−46142
80.6573.35           6192
83.1570.85           6886
84.2069.80  1.26 × 10−52.3320.408  1.75 × 10−51.13 × 10−71.97 × 10−4   
85.4568.55           8008
87.0866.93      0.792.31   9173
90.4863.53105.0125.7            
90.6063.40        1.81 × 10−54.29 × 10−61.68 × 10−314439
91.7862.23  6.31 × 10−52.4912.104        
93.1560.85           10548
95.2358.78           12001
97.3056.70        2.10 × 10−51.17 × 10−71.83 × 10−415087
99.2554.75  2.21 × 10−42.2722.3011        
99.7354.28           14469
102.0851.93103.3325.96         14347
103.7350.28        2.94 × 10−51.11 × 10−71.95 × 10−4   
103.8850.13      2.071.68   16564  
Lower aquifer (Boorthanna Formation)104.0050.00              
106.7347.28      2.641.76      
108.0046.00107.7427.441.58 × 10−42.3120.108.1  7.99 × 10−51.98 × 10−72.64 × 10−421500−35.8−3.7
138.0016.00