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Table 10 Comparison of model ore fluids with modern Na–Cl and Na–Ca–Cl basinal brines

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

Composite ore-brine (this study): log –pH regionsa
Parameter MVT Anderson (1975)c MVT Giordano and Barnes (1981)d MVT Sverjensky (1984)e RBRBM Giordano (1994)f
T/°C 100 100 100 100
TDS/mg L-1 179270 179270 179270 179270
∑Cl-/mg L-1 97450 97450 97450 97450
pH 6.0 7.5 4.6 6.0
∑H2S/mg L-1g 10-6.3 340 3.4 10-6.3
10-10.8 10-2 10-4 10-10.8
∑SO4/mg L-1h 960 10-2 960 960
10-2 10-7.2 10-2 10-2
∑monocbx/mg L-1i 7700 7700 7700 7700
mmonocbxi 0.13 0.13 0.13 0.13
∑dicbx/mg L-1j 300 300 300 300
mdicbxj 0.0029 0.0029 0.0029 0.0029
mCl/∑mcbx 23 23 23 23
mmonocbx/∑mdicbx 45 45 45 45
Pb/mg L-1k 65 0.001 0.02 65
Pb/mg L-1rangel Fig. 2 Fig. 2 Fig. 2 Fig. 2
Zn/mg L-1k 420 0.002 0.02 420
Zn/mg L-1rangel Fig. 3 Fig. 3 Fig. 3 Fig. 3
Modern petroleum field brinesb
Parameter Low ∑H2S, high trace metal content Low ∑H2S, low trace metal content High ∑H2S, low trace metal content  
T/°C 50 to 250 50 to 250 50 to 250  
TDS/mg L-1 100 000 to 330000 20 000 to 330000 20 000 to 330000  
∑Cl-/mg L-1 60000 to 210000 12000 to 210000 12000 to 210000  
pH 4 to 6.5 4 to 8 4 to 8  
∑H2S/mg L-1g <0.1 <1.0 1.0 to 1000  
<10-5.5 <10-4.5 10-4.5 to 10-1.4  
∑SO4/mg L-1h 0.1 to 1000 0.1 to 1000 0.1 to 1000  
10-6 to 10-2 10-6 to 10-2 10-6 to 10-2  
monocbx/mg L-1i < 1.0 to 300 < 1.0 to 10000 < 1.0 to 10000  
mmonocbx <10-4.8 to 0.005 <10-4.8 to ~ 0.15 <10-4.8 to ~ 0.15  
∑dicbx/mg L-1j <1.0 < 1.0 to 2600 < 1.0 to 2600  
mdicbxj <10-5 <10-5 to 0.025 <10-5 to 0.025  
mCl/∑mcbx >340 8 to >1000 8 to >1000  
mmonocbx/∑mdicbx ~ 30 to 300 >20 >20  
Pb/mg L-1k 5 to 70 (cluster) < 1.0 (cluster) <0.1 (cluster)  
Pb/mg L-1 rangel 1 to 111 BDL to 0.9 BDL to 0.9  
Zn/mg L-1k 15 to 250 (cluster) < 1.0 (cluster) <0.1 (cluster)  
Zn/mg L-1 rangel 1 to 575 BDL to 0.9 BDL to 0.9  
  1. aTable 1 and Fig. 1 through 5. bRittenhouse et al.,[98] Billings et al.,[99] Hitchon et al.,[100,101] Collins,[102] Carpenter et al.,[57] Carpenter and Trout,[103] Kharaka,[104] Kharaka et al.,[79,105,106] Land et al.,[107] Saunders and Swann,[108] Moldovanyi and Walter,[109] Kyle,[110] Lundegard and Kharaka,[78] Hanor,[59,60,61,62,111,112] Land,[113] Polandri and Reed.[114] cpH = 6.0, log = -50.0 dpH = 7.5, log = -57.0 epH = 4.7, log = -51.8 fpH = 6.0, log = -50.0 gTotal dissolved inorganic sulfide defined as ∑H2S = H2S + HS- (mg L-1) and (mol kg-1). hTotal dissolved sulfate defined as the sum of all dissolved sulfate species in mg L-1() and as the molal sum of all dissolved sulfate species (∑m SO4) in mol kg -1. iMonocbx = sum of monocarboxylate anions listed in Table 2: ∑monocbx = total dissolved monocbx in mg L-1; ∑mmonocbx = total molality of dissolved monocbx in mol kg-1, jdicbx = sum of dicarbonxylate anions listed in Table 2: ∑dicbx = total dissolved dicbx in mg L-1; ∑mdicbx = total molality of dissolved dicbx in mol kg-1. kFor composite ore-brine; the metal concentration at indicated log –pH conditions. Cluster = most common values observed for modern petroleum field brines. lBDL = below detection limit; less than about 0.01 mg L-1.