Norseman Gold operates Australia's longest continuously running gold mining operation, having produced over 5.5 million ounces of gold over a period of more than 65 years from its Norseman field located 725km east of Perth, Western Australia.
Key projects
Harlequin region
The Harlequin mineralisation can be broadly grouped based on the host rock and mineralisation style. Mineralisation is either associated with structures passing through granodiorites/porphyry/basalt contact, for example the HV6, HV5A, and Salamander Reefs, hosted within coarse grained gabbroic host rocks, as is the case with the HV1 and HV1 East Reefs, or localised at the intersection of large NNE structures and shallow dipping tensional veins (HV5F and HV5B).
Typically the reef structures are more complex at Harlequin than those exploited at Main Fields, and are therefore more difficult to correlate between drilling. Gold grades are characterised by a high ‘nugget effect’ and are inhomogeneously distributed within the reefs with large barren or sub-grade regions common within reef.