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ACKNOWLEDGEMENTS We thank Dr John Millett (Volcanic Basin Petroleum Research VBPR) for providing the rock samples, Dr Maxim Lebedev (Curtin University) for helping us with the acquisition of the µCT images, and Prof Andrew Putnis for his insights in the mineralogical description of the samples. We also thank the Aberdeen-Curtin Alliance (http://aberdeencurtinalliance.org/) for providing funding for this research. Part of this study was undertaken using the TIMA instrumentation (ARC LE140100150) at the John de Laeter Center, Curtin University. This work was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia. DATA AVAILABILITY The data underlying this paper are available in Mendeley Data, at http://dx.doi.org/10.17632/ysmt4kcjtn.2. Results-related data are available in the paper and its online supplementary material.