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\section{Results}  The results of isotopic and clumped isotope analysis of all samples and standards are reported in Table 1 and plotted in Figure 5 and 6. The spatial distribution of isotope values and temperature for DLR7 is plotted in Figure  5(a) to 5(d). and for DLR7i in Figure 5(b). Because the two sections were cut at different locations across the vein we don't expect a direct correlation between the two data sets.  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‰_{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.