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

Progress in Earth and Planetary Science

Table 2 Regression coefficients for figures, y = a + bx

Comment	a	b	r ²
Figure 1: pressure (MPa) = a + b • temperature (°C)	−677 ± 308	1.7 ± 0.4	0.42
Figure 3: FWHH(cm⁻¹) = a + b • temperature (°C)
ZrO₂-H₂O	175 ± 4	0.116 ± 0.006	0.995
ZrO₂-NaOH-H₂O	255 ± 14	−0.19 ± 0.02	0.95
ZrO₂-SiO₂-H₂O	176 ± 6	−0.120 ± 0.008	0.993
ZrO₂-SiO₂-NaOH-H₂O	170 ± 15	−0.12 ± 0.02	0.96

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)
See also text for detailed description and discussion of these equilibria