Geofluids / 2018 / Article / Tab 4

Research Article

Physiochemical Restrictions of Mineral Zoning of Sediment-Hosted Stratiform Copper Deposit in SW China

Table 4

Chemical reactions and , , and slope of chemical reactions at different temperature.

Chemical reactions = 373 K = 423 K = 473 K = 523 K

(1) 3Fe + 2O2 = Fe3O4−69.1−59.9−52.7−46.8
(2) 2Fe3O4 + 1/2O2 = 3Fe2O3−53.7−45.7−39.3−34.2
(3) Fe + 1/2S2 = FeS−37.9−32.5−28.3−24.9
(4) FeS + 1/2S2 = FeS2−25.0−20.5−16.9−14.0
(5) 3FeS + 2O2 = Fe3O4 + 1/2S2,
(6) 3FeS2 + 2O2 = Fe3O4 + 3S2,
(7) 2FeS2 + 3/2O2 = Fe2O3 + 2S2,
(8) 2Cu + 1/2O2 = Cu2O−39.1−33.6−29.3−25.9
(9) Cu2O + 1/2O2 = 2CuO−29.6−24.8−20.8−17.7
(10) 2Cu + 1/2S2 = Cu2S−34.3−29.7−26.1−23.2
(11) Cu2S + 1/2O2 = Cu2O + S2,
(12) Cu2S + 1/2O2 = 2CuO + S2,
(13) 2FeS + 5CuFeS2 + 4O2 = Cu5FeS4 + 2Fe3O4 + 4S2,
(14) 3FeS + CuFeS2 + 2O2 = CuFeS2+ Fe3O4 + 3/2S2,
(15) 3FeS2 + CuFeS2 + 2O2 = CuFeS2 + Fe3O4 + 3S2,
(16) FeS2 + 5CuFeS2 + S2 = Cu5FeS4 + 5FeS2−14.3−12.7−11.1−8.6
(17) Cu2S + 2Fe3O4 + 1/2O2 = Cu2S + 3Fe2O3−42.4−40.8−39.3−34.2
(18) 2FeS2 + CuFeS2 + 3/2O2 = CuFeS2 + Fe2O3 + 2S2,
(19) 2FeS2 + Cu5FeS4 + 3/2O2 = Cu5FeS4 + Fe2O3 + 2S2,
(20) Cu2S + Fe2O3 + 1/2O2 = Cu2O + Fe2O3 + S2,
(21) 3Cu5FeS4 + 2O2 = Cu2S + Fe3O4 + 9/4S2,
(22) 5CuFeS2 + Fe2O3 + 15/4O2 = Cu5FeS4 + 7/2Fe2O3 +3S2,
(23) 4S2 = S8−8.2−6.5−5.1−4.1

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