Geofluids / 2020 / Article / Fig 8

Research Article

Structural Controls on Shallow Cenozoic Fluid Flow in the Otago Schist, New Zealand

Figure 8

Strontium and neodymium isotopes. (a) Measured in situ 87Sr/86Sr of carbonate phases (the grey area, see (b) for data) compared to age-corrected (20 Ma) measured whole-rock 87Sr/86Sr and 143Nd/144Nd from the greyschist, altered greyschist, and hydrothermal breccia. Published in-situ 87Sr/86Sr for epidote are plotted for comparison [11, 24]. (b) Individual in situ 87Sr/86Sr isotope data of the different types of carbonate phases from Akatore Creek and Bruce Rocks. The grey boxes represent the weighted average Sr isotope ratio with errors from each group of samples.

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