Sir: We welcome the contribution of Pollard (2014) to van Dongen et al. (2013). Pollard’s main comment is that his observations at Ok Tedi imply a “very different picture of the relationships between intrusive rocks, host rocks, and mineralization” than the one we proposed. We would argue that his observations are actually broadly consistent with our model, but our interpretation was more concerned with the deposit-scale picture, as this better served the main aims of our paper. One of our primary aims was to present a 3-D geologic model and grade distribution images, as this is rare in Economic...

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