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The results of isotopic and clumped isotope analysis of all samples and standards are reported in Table 1 and plotted in Figure 5(a) to 5(d).  The bulk isotope composition of the vein occupies a restricted range of $\delta^{13}$C and $\delta^{18}$O values, Figure 5(a). $\delta^{13}$C values in particular lie between +1.5 to +3.7\perthousand_{VPDB}. +3.7‰_{VPDB}. There is a similar restricted range in $\\delta^{18}$O values between -7 and -10‰_{VPDB}. There is a degree of structure beginning to emerge from the plot.