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Progress in Earth and Planetary Science

Table 3 Regression coefficients for figures, y = a + bx

From: An in situ experimental study of Zr4+ transport capacity of water-rich fluids in the temperature and pressure range of the deep crust and upper mantle

Comment

a

b

r 2

∆H (kJ/mol)

Figure 6: ln K = a + b/T(K −1)

 ZrO2-H2O (ZH)

−2.4 ± 1.9

−5121 ± 1940

0.78

43 ± 16

 ZrO2-NaOH-H2O (low-dens) (ZHN-lo)

32 ± 3

−23,436 ± 2910

0.98

195 ± 24

 ZrO2-NaOH-H2O (high-dens) (ZHN-hi)

39 ± 4

−27,866 ± 3540

0.95

232 ± 29

 ZrO2-NaOH-H2O (ZHNS)

19 ± 1

−11,467 ± 1350

0.98

94 ± 11

 ZrO2-NaOH-H2O (ZHN-Wilke et al. 2012)

44 ± 1

−33,845 ± 175

0.999

282 ± 15

 ZrO2-SiO2-NaOH-H2O (ZHNS)

5.7 ± 0.5

−3655 ± 473

0.95

30 ± 4

  1. Abbreviations: ZH: ZrO2-H2O; ZHN (-lo, -hi, -Wilke et al. 2012 , and ZHNS): ZrO2-NaOH-H2O with low- and high-density (pressure) trajectories, interpolation from Wilke et al. (2012), and the ZHN equilibrium in the more complete system ZrO2SiO2-NaOH-H2O; ZHNS: ZrO2SiO2-NaOH-H2O
  2. Note that data from the system ZrO2-SiO2-H2O are not shown because only two compositions at nearby temperatures were determined, and for those, there was no discernible temperature effect (see also Fig. 3)
  3. See also text for detailed description and discussion of these equilibria
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