A volcanic sequence is described from the Golden Cross Mine, Waihi, New Zealand. The sequence includes seven
lithostratigraphic units comprising flow and pyroclastic units of Coromandel Group andesite and dacite and
overlying Whitianga Group dacite and rhyolite which is intruded by the Golden Cross dacite porphyry and rhyolite
dykes. The sequence is mineralized and is unconformably overlain bv_ two post-mineral units, the lacustnne
Waitekauri beds and Omahine Subgroup andesite. Detailed structural analysis of mine data has identified four deformational events (D 1-D4) and related these to the
gold-silver mineralizing events. Faulting was coeval with the mineralization and directly controlled the
development, localization, style and geometry of the ore shoots. Mineralization developed in competent lithologies
where dilation occurred during faulting. The Empire Fault is the master shear which controlled fluid flow.
Mineralized veining developed in response to tectonic pulses occurring at slightly different stages as represented by
the underground Empire vein complex and the open pit vein array. The mineralizing events culminated with the
deposition of barren calcite veins. Post-mineral movement along the Western Boundary fault appears to have offset
the ore body.