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Table 1 Model ore-fluids for Mississippi Valley-type (MVT) and red-bed related base metal (RBRBM) deposits

From: Transport of Pb and Zn by carboxylate complexes in basinal ore fluids and related petroleum-field brines at 100 °C: the influence of pH and oxygen fugacity

Parameter MVT Anderson [37] MVT Giordano and Barnes [39] MVT Sverjensky[41] RBRBMaGiordano[76] Composite ore-brine (this study)
T/°C 100 100 125 100 100
pH 5.7 to 6.7 6.8 to 7.8 4.5 to 5.5 5.5 to 6.5 variable
log ?1? -48 to -51 -54 to -58 -50.5 to -51.5 -49 to -51 variable
log ∑msulfur –2 -2 -4.6 -2 -2
log ∑mcarbonate -1.37 -2 to -4 -1.52 -2.4 -2
3.0 (2.0) 2.76 (1.4) 2.0 3.0
3.0 (1.5) 1.67 (1.0) (1.0) 2.81
  (0.02) 0.012 (.007) (0.01) 0.05
0.1 (0.05) 0.491 (.074) (0.01) 0.2
  (0.02) 0.056 (0.013) (0.005) 0.1
Chlorinityb 99530 99530 93450 69050 97450
SalinityC 169 200 169 200 158 865 132480 179 270
Saturation
Galena X X X X X
Sphalerite X X   X X
Pyrite   X X   xd
Hematite X    x xe
Magnetite      xf
Calcite X X   X  
Dolomite    X   
Quartz   X X X X
K-Feldspar   X    X
Muscovite   X    
Kaolinite    X   
  1. aThe composition of this model ore fluid is a composite based on parameter values proposed by Rose,[23,24] Sverjensky,[31,32] and Branam and Ripley.[75] bChlorinity = Cl- concentration in mg L-1. Calculated from and assuming a fluid density of l.l g cm-3 cSalinity = total dissolved solids (TDS) in mg L-1. Calculated assuming a fluid density of l.l g cm-3. dPyrite stability field only. eHematite stability field only. fMagnetite stability field only.