This project will integrate micro- and meso-scale structural and geochemical data from the Irish midlands in order to understand the fluid flow and fluid mixing responsible for the development of world-class Zn-Pb orebodies. These data will be used to characterise "building blocks" of differing scales which will constrain numerical modelling of flow associated with individual faults as well as the regional system. We have assembled a multi-disciplinary, international team from Leeds, Imperial College, SURRC, Edinburgh, CSIRO (Australia) and Colorado together with assistance from Tara mines in Ireland to tackle this project.